606 changed files with 52073 additions and 57459 deletions
--- a/.eslintrc
+++ b/.eslintrc
@ -11,7 +11,6 @@
 		"comma-dangle": [ 2, "never" ],
 		"curly": 0,
 		"no-bitwise": 0,
-		"no-cond-assign": 1,
 		"no-console": 0,
 		"no-control-regex": 0,
 		"no-unused-vars": 1,
--- a/.gitattributes
+++ b/.gitattributes
@ -13,5 +13,3 @@ xlsx.js           linguist-generated=true binary
 xlsxworker.js     linguist-generated=true binary
 tests/core.js     linguist-generated=true binary
 tests/fixtures.js linguist-generated=true binary
-
-test.mjs    lingust-generated=false binary=false text eol=lf
--- a/.github/workflows/bun.yml
+++ b/.github/workflows/bun.yml
@ -1,20 +0,0 @@
-name: 'Tests: Bun'
-
-on: [pull_request, push]
-
-jobs:
-  # misc test
-  misc:
-    name: 'misc (with codepage)'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: antongolub/action-setup-bun@v1
-      - uses: ljharb/actions/node/install@main
-        with:
-          node-version: '16.'
-      - run: sudo curl -Lo /usr/bin/rooster https://github.com/SheetJS/rooster/releases/download/v0.2.0/rooster-v0.2.0-linux-amd64
-      - run: sudo chmod a+x /usr/bin/rooster
-      - run: make init
-      - run: 'cd test_files; make all; cd -'
-      - run: 'env FMTS=misc bun hotcross.mjs'
--- a/.github/workflows/deno.yml
+++ b/.github/workflows/deno.yml
@ -3,9 +3,26 @@ name: 'Tests: deno 1.x'
 on: [pull_request, push]

 jobs:
+  # small test
+  misc:
+    runs-on: ubuntu-latest
+    env:
+      FMTS: misc
+    steps:
+      - uses: actions/checkout@v2
+      - uses: denoland/setup-deno@main
+        with:
+          deno-version: v1.x
+      - uses: ljharb/actions/node/install@main
+        with:
+          node-version: '16.'
+      - run: sudo curl -Lo /usr/bin/rooster https://github.com/SheetJS/rooster/releases/download/v0.2.0/rooster-v0.2.0-linux-amd64
+      - run: sudo chmod a+x /usr/bin/rooster
+      - run: make init
+      - run: 'cd test_files; make all; cd -'
+      - run: deno test --allow-env --allow-read --allow-write test.ts
  # full test
  full:
-    name: 'full (with codepage)'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
@ -19,21 +36,4 @@ jobs:
      - run: sudo chmod a+x /usr/bin/rooster
      - run: make init
      - run: 'cd test_files; make all; cd -'
-      - run: deno test --allow-env --allow-read --allow-write --config misc/test.deno.jsonc test.ts
-  # full test (no codepage)
-  fullnocp:
-    name: 'full (no codepage)'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: denoland/setup-deno@main
-        with:
-          deno-version: v1.x
-      - uses: ljharb/actions/node/install@main
-        with:
-          node-version: '16.'
-      - run: sudo curl -Lo /usr/bin/rooster https://github.com/SheetJS/rooster/releases/download/v0.2.0/rooster-v0.2.0-linux-amd64
-      - run: sudo chmod a+x /usr/bin/rooster
-      - run: make init
-      - run: 'cd test_files; make all; cd -'
-      - run: deno test --allow-env --allow-read --allow-write --config misc/test.deno.jsonc testnocp.ts
+      - run: deno test --allow-env --allow-read --allow-write test.ts
--- a/.gitignore
+++ b/.gitignore
@ -14,7 +14,6 @@ tmp
 *.[pP][mM][dD]*
 *.[pP][dD][fF]
 *.[sS][lL][kK]
-*.[sS][yY][lL][kK]
 *.socialcalc
 *.[xX][lL][sSwWcCaAtTmMrR]
 *.[xX][lL][sSaAtT][xXmMbB]
@ -23,16 +22,13 @@ tmp
 *.[xX][mM][lL]
 *.[xX][lL][mM][lL]
 *.[uU][oO][sS]
-*.[wW][kKqQbB][sS1234567890]
+*.[wW][kKqQbB][S1234567890]
 *.[qQ][pP][wW]
 *.[fF][mM][3tT]
 *.[bB][iI][fF][fF][23458]
 *.[rR][tT][fF]
-*.[eE][tT]
 *.[eE][tT][hH]
 *.[nN][uU][mM][bB][eE][rR][sS]
-*.[mM][oO][dD]
-*.[dD][tT][aA]
 *.123
 *.htm
 *.html
--- a/.gitmodules
+++ b/.gitmodules
@ -1,4 +1,3 @@
 [submodule "test_files"]
 	path = test_files
 	url = https://github.com/SheetJS/test_files
-	ignore = dirty
--- a/.npmignore
+++ b/.npmignore
@ -8,10 +8,8 @@ index.html
 misc/
 node_modules
 *.tgz
-*.jsx
 _book
 book.json
-v8.log
 tmp
 *.[tT][xX][tT]
 *.[cC][sS][vV]
@ -20,24 +18,18 @@ tmp
 *.[pP][mM][dD]*
 *.[pP][dD][fF]
 *.[sS][lL][kK]
-*.[sS][yY][lL][kK]
 *.socialcalc
-*.[xX][lL][sSwWcCaAtTmMrR]
+*.[xX][lL][sSwWcCaAtTmM]
 *.[xX][lL][sSaAtT][xXmMbB]
 *.[oO][dD][sS]
 *.[fF][oO][dD][sS]
 *.[xX][mM][lL]
-*.[xX][lL][mM][lL]
 *.[uU][oO][sS]
 *.[wW][kKqQbB][S1234567890]
 *.[qQ][pP][wW]
-*.[fF][mM][3tT]
 *.[bB][iI][fF][fF][23458]
 *.[rR][tT][fF]
-*.[eE][tT]
 *.[eE][tT][hH]
-*.[nN][uU][mM][bB][eE][rR][sS]
-*.[mM][oO][dD]
 *.123
 *.htm
 *.html
@ -63,9 +55,6 @@ shim.js
 test.js
 test.mjs
 test.ts
-test.mts
-testnocp.ts
-testbun.mjs
 .jscs.json
 .gitmodules
 .travis.yml
--- a/.spelling
+++ b/.spelling
@ -39,22 +39,18 @@ CommonJS
 Deno
 Ethercalc
 ExtendScript
-InDesign
 IndexedDB
 JavaScriptCore
 LocalStorage
 NestJS
 NPM
 Nuxt
-PhantomJS
-Photoshop
 Redis
 RequireJS
 Rollup
 SessionStorage
 SQLite
 SystemJS
-Vite
 VueJS
 WebKit
 WebSQL
@ -99,7 +95,6 @@ codepage
 config
 customizable
 datagrid
-dataset
 deduplication
 destructuring
 embeddable
@ -124,7 +119,6 @@ utils
 commonjs
 async
 uncheck
-vendoring

 - demos/altjs/README.md
 ChakraCore
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -4,95 +4,6 @@ This log is intended to keep track of backwards-incompatible changes, including
 but not limited to API changes and file location changes.  Minor behavioral
 changes may not be included if they are not expected to break existing code.

-## v0.20.2
-
-* Reworked parsing methods to avoid slow regexes (CVE-2024-22363)
-* HTML properly encode data-v attribute
-* SYLK read and write error cells
-
-## v0.20.1
-
-* `init` use packaged test files to work around GitHub breaking changes
-* SSF date code rounding to 15 decimal digits (h/t @davidtamaki)
-* `sheet_to_json` force UTC interpretation for formatted strings (h/t @Blanay)
-* QPW extract result of string formula
-* XLSX parse non-compliant merge cell expressions
-* NUMBERS correctly handle rows omitted from official exports
-* DBF parse empty logical field (h/t @Roman91)
-* `dense` option added to types
-* package.json add mini and core scripts to export map (h/t @stof)
-
-## v0.20.0
-
-* Use UTC interpretation of Date objects for date cells (potentially breaking)
-* API functions support UTC and local time value interpretations
-* Export `NaN` values to `#NUM!` and infinite values to `#DIV/0!`
-
-## v0.19.3
-
-* XLSX Ensure comment address is valid (h/t @slonser)
-* Enforce Excel worksheet name restrictions
-* Fixed "Prototype Pollution" vulnerability (CVE-2023-30533)
-
-## v0.19.2
-
-* XLSX proper decoding of hyperlinks (h/t @tw-yaxu)
-* XLSX ignore unexpected attributes in rich text (h/t @colin4)
-* `sheet_to_json` type fix (h/t @chsdwn)
-
-## v0.19.1
-
-* Fixed types issue in strict mode (h/t @younes-io)
-* Numbers 12.2 parsing skip ActivityStream.iwa
-
-## v0.19.0
-
-* XLSX export hyperlinks compatible with google sheets (h/t Evan Bovie)
-* NUMBERS export multiple sheets, full worksheet range
-* formalized `dense` mode
-
-## v0.18.12
-
-* `package.json` added types in `exports` structure
-* uncapped NUMBERS single-sheet single-table export
-* DBF export records using supported codepages
-
-## v0.18.11
-
-* Base64 input ignore data URI wrapper
-* Parse ZIP files that use ZIP64 extended information field
-* More precise handling of time-only values
-* Threaded Comment fallback text for older Excel
-
-## v0.18.10
-
-* `exports` field in package.json to satiate ViteJS and newer tooling
-* JSC (Safari / Bun) perf, see <https://bugs.webkit.org/show_bug.cgi?id=243148>
-* workbook `bookType` property to denote the origin format when parsed from file
-* XLSX force export of stub cells with number formats when `sheetStubs` is set
-
-## v0.18.9
-
-* XLSX / ODS write defined names
-* sync defined names to AutoFilter setting on export
-* 1904 date system setting properly roundtripped
-* ODS read/write number formats
-
-## v0.18.8
-
-* Plaintext parsing of dateless meridien time values (`1:23:45 PM`)
-* Legacy format (SYLK / WK# / Multiplan) minutiae
-
-## v0.18.7
-
-* Normalized handling of `\r` and `\n` newline characters
-
-## v0.18.6
-
-* Removed all npm dependencies
-* Auto-correct bad Google Sheets format `d.m`
-* NUMBERS write merge cells, cells up to column "ALL"
-
 ## v0.18.5

 * Enabled `sideEffects: false` in package.json
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -12,9 +12,9 @@ no commercial product should depend on them.

 These are pretty short reads and emphasize the importance of proper licensing:

- https://github.com/jazzband/tablib/issues/114 (discussion of other tools)
+- https://github.com/kennethreitz/tablib/issues/114 (discussion of other tools)

- https://web.archive.org/web/20120615223756/http://www.codinghorror.com/blog/2007/04/pick-a-license-any-license.html
+- http://www.codinghorror.com/blog/2007/04/pick-a-license-any-license.html


 # Raising Issues
--- a/91
+++ b/91
@ -9,7 +9,7 @@ HTMLLINT=index.html

 MINITGT=xlsx.mini.js
 MINIFLOW=xlsx.mini.flow.js
-MINIDEPS=$(shell cat misc/mini.lst)
+MINIDEPS=$(shell cat mini.lst)

 ESMJSTGT=xlsx.mjs
 ESMJSDEPS=$(shell cat misc/mjs.lst)
@ -59,7 +59,7 @@ $(MTSBITS): misc/%: modules/%

 .PHONY: clean
 clean: ## Remove targets and build artifacts
-	rm -f $(TARGET) $(FLOWTARGET) $(ESMJSTGT) $(MINITGT) $(MINIFLOW)
+	rm -f $(TARGET) $(FLOWTARGET)

 .PHONY: clean-data
 clean-data:
@ -67,9 +67,11 @@ clean-data:

 .PHONY: init
 init: ## Initial setup for development
-	rm -rf test_files
-	if [ ! -e test_files.zip ]; then curl -LO https://test-files.sheetjs.com/test_files.zip; fi
-	unzip test_files.zip
+	git submodule init
+	git submodule update
+	#git submodule foreach git pull origin master
+	#git submodule foreach make
+	git submodule foreach make all
 	mkdir -p tmp

 DISTHDR=misc/suppress_export.js
@ -92,7 +94,7 @@ dist: dist-deps $(TARGET) bower.json ## Prepare JS files for distribution
 	uglifyjs dist/$(MINITGT) $(UGLIFYOPTS) -o dist/$(LIB).mini.min.js --source-map dist/$(LIB).mini.min.map --preamble "$$(head -n 1 bits/00_header.js)"
 	misc/strip_sourcemap.sh dist/$(LIB).mini.min.js
 	@# extendscript
-	cat <(printf '\xEF\xBB\xBF') <(head -n 1 bits/00_header.js) shim.js $(DISTHDR) $(REQS) dist/$(TARGET) > dist/$(LIB).extendscript.js
+	cat <(head -n 1 bits/00_header.js) shim.js $(DISTHDR) $(REQS) dist/$(TARGET) > dist/$(LIB).extendscript.js
 	@# zahl
 	cp modules/xlsx.zahl.js modules/xlsx.zahl.mjs dist/
 	@#
@ -106,18 +108,23 @@ dist-deps: ## Copy dependencies for distribution
 .PHONY: aux
 aux: $(AUXTARGETS)

-BYTEFILEC=dist/xlsx.{full,core,mini}.min.js xlsx.mjs
-BYTEFILER=dist/xlsx.extendscript.js
+BYTEFILEC=dist/xlsx.{full,core,mini}.min.js
+BYTEFILER=dist/xlsx.extendscript.js xlsx.mjs
 .PHONY: bytes
 bytes: ## Display minified and gzipped file sizes
 	@for i in $(BYTEFILEC); do npx printj "%-30s %7d %10d" $$i $$(wc -c < $$i) $$(gzip --best --stdout $$i | wc -c); done
 	@for i in $(BYTEFILER); do npx printj "%-30s %7d" $$i $$(wc -c < $$i); done
-	@npx printj "%-30s         %10d" "treeshake" "$$(npx -y esbuild@0.14.14 --bundle misc/import.js | wc -c)"

+.PHONY: graph
+graph: formats.png legend.png ## Rebuild format conversion graph
+misc/formats.svg: misc/formats.dot
+	circo -Tsvg -o$@ $<
+misc/legend.svg: misc/legend.dot
+	dot -Tsvg -o$@ $<
+formats.png legend.png: %.png: misc/%.svg
+	node misc/coarsify.js misc/$*.svg misc/$*.svg.svg
+	npx svgexport misc/$*.svg.svg $@ 0.5x

-.PHONY: git
-git: ## show version string
-	@echo "$$(node -pe 'require("./package.json").version')"

 .PHONY: nexe
 nexe: xlsx.exe ## Build nexe standalone executable
@ -137,62 +144,31 @@ pkg: bin/xlsx.njs xlsx.js ## Build pkg standalone executable
 test mocha: test.js ## Run test suite
 	mocha -R spec -t 30000

-#*                      To run tests for one format, make test_<fmt>
-#*                      To run the core test suite, make test_misc
-
-.PHONY: testdot
-testdot: test.js ## Run test suite using dot reporter
-	mocha -R dot -t 30000
-
 .PHONY: test-esm
 test-esm: test.mjs ## Run Node ESM test suite
-	npx -y mocha@9 -R spec -t 30000 $<
-
-test.ts: test.mts
-	node -pe 'var data = fs.readFileSync("'$<'", "utf8"); data.split("\n").map(function(l) { return l.replace(/^describe\((.*?)function\(\)/, "Deno.test($$1async function(t)").replace(/\b(?:it|describe)\((.*?)function\(\)/g, "await t.step($$1async function(t)").replace("assert.ok", "assert.assert"); }).join("\n")' > $@
-
-.PHONY: test-bun
-test-bun: testbun.mjs ## Run Bun test suite
-	bun $<
+	npx mocha -r esm -R spec -t 30000 $<

 .PHONY: test-deno
 test-deno: test.ts ## Run Deno test suite
-	deno test --check --allow-env --allow-read --allow-write --config misc/test.deno.jsonc $<
-
-.PHONY: test-denocp
-test-denocp: testnocp.ts ## Run Deno test suite (without codepage)
-	deno test --check --allow-env --allow-read --allow-write --config misc/test.deno.jsonc $<
+	deno test --allow-env --allow-read --allow-write $<

+#*                      To run tests for one format, make test_<fmt>
+#*                      To run the core test suite, make test_misc
 TESTFMT=$(patsubst %,test_%,$(FMT))
 .PHONY: $(TESTFMT)
 $(TESTFMT): test_%:
 	FMTS=$* make test

-TESTFMT=$(patsubst %,testdot_%,$(FMT))
-.PHONY: $(TESTFMT)
-$(TESTFMT): testdot_%:
-	FMTS=$* make testdot
-
 TESTESMFMT=$(patsubst %,test-esm_%,$(FMT))
 .PHONY: $(TESTESMFMT)
 $(TESTESMFMT): test-esm_%:
 	FMTS=$* make test-esm

 TESTDENOFMT=$(patsubst %,test-deno_%,$(FMT))
-.PHONY: $(TESTDENOFMT)
+.PHONY: $(TESTESMFMT)
 $(TESTDENOFMT): test-deno_%:
 	FMTS=$* make test-deno

-TESTDENOCPFMT=$(patsubst %,test-denocp_%,$(FMT))
-.PHONY: $(TESTDENOCPFMT)
-$(TESTDENOCPFMT): test-denocp_%:
-	FMTS=$* make test-denocp
-
-TESTBUNFMT=$(patsubst %,test-bun_%,$(FMT))
-.PHONY: $(TESTBUNFMT)
-$(TESTBUNFMT): test-bun_%:
-	FMTS=$* make test-bun
-
 .PHONY: travis
 travis: ## Run test suite with minimal output
 	mocha -R dot -t 30000
@ -203,7 +179,7 @@ ctest: ## Build browser test fixtures

 .PHONY: ctestserv
 ctestserv: ## Start a test server on port 8000
-	@cd tests && python -mSimpleHTTPServer || python3 -mhttp.server || npx -y http-server -p 8000 .
+	@cd tests && python -mSimpleHTTPServer

 ## Code Checking

@ -254,7 +230,22 @@ misc/coverage.html: $(TARGET) test.js
 coveralls: ## Coverage Test + Send to coveralls.io
 	mocha --require blanket --reporter mocha-lcov-reporter -t 30000 | node ./node_modules/coveralls/bin/coveralls.js

-MDLINT=README.md
+READEPS=$(sort $(wildcard docbits/*.md))
+README.md: $(READEPS)
+	awk 'FNR==1{p=0}/#/{p=1}p' $^ | tr -d '\15\32' > $@
+
+.PHONY: readme
+readme: README.md ## Update README Table of Contents
+	markdown-toc -i README.md
+
+.PHONY: book
+book: readme graph ## Update summary for documentation
+	printf "# Summary\n\n- [xlsx](README.md#sheetjs-js-xlsx)\n" > misc/docs/SUMMARY.md
+	markdown-toc README.md | sed 's/(#/(README.md#/g'>> misc/docs/SUMMARY.md
+	<README.md grep -vE "(details|summary)>" > misc/docs/README.md
+
+DEMOMDS=$(sort $(wildcard demos/*/README.md))
+MDLINT=$(DEMOMDS) $(READEPS) demos/README.md
 .PHONY: mdlint
 mdlint: $(MDLINT) ## Check markdown documents
 	./node_modules/.bin/alex $^
--- a/README.md
+++ b/README.md
--- a/bits/00_header.js
+++ b/bits/00_header.js
@ -1,6 +1,6 @@
 /*! xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
 /* vim: set ts=2: */
 /*exported XLSX */
-/*global global, exports, module, require:false, process:false, Buffer:false, ArrayBuffer:false, DataView:false, Deno:false, Set:false, Float32Array:false */
+/*global exports, module, require:false, process:false, Buffer:false, ArrayBuffer:false, DataView:false, Deno:false */
 var XLSX = {};
 function make_xlsx_lib(XLSX){
--- a/bits/01_version.js
+++ b/bits/01_version.js
@ -1 +1 @@
-XLSX.version = '0.20.2';
+XLSX.version = '0.18.5';
--- a/bits/02_codepage.js
+++ b/bits/02_codepage.js
@ -2,30 +2,34 @@ var current_codepage = 1200, current_ansi = 1252;
 /*:: declare var cptable:any; */
 /*global cptable:true, window */
 var $cptable;
+if(typeof cptable !== 'undefined') $cptable = cptable;
+else if(typeof module !== "undefined" && typeof require !== 'undefined') {
+	$cptable = require('./dist/cpexcel.js');
+}

 var VALID_ANSI = [ 874, 932, 936, 949, 950, 1250, 1251, 1252, 1253, 1254, 1255, 1256, 1257, 1258, 10000 ];
 /* ECMA-376 Part I 18.4.1 charset to codepage mapping */
 var CS2CP = ({
-	0:    1252, /* ANSI */
-	1:   65001, /* DEFAULT */
-	2:   65001, /* SYMBOL */
-	77:  10000, /* MAC */
-	128:   932, /* SHIFTJIS */
-	129:   949, /* HANGUL */
-	130:  1361, /* JOHAB */
-	134:   936, /* GB2312 */
-	136:   950, /* CHINESEBIG5 */
-	161:  1253, /* GREEK */
-	162:  1254, /* TURKISH */
-	163:  1258, /* VIETNAMESE */
-	177:  1255, /* HEBREW */
-	178:  1256, /* ARABIC */
-	186:  1257, /* BALTIC */
-	204:  1251, /* RUSSIAN */
-	222:   874, /* THAI */
-	238:  1250, /* EASTEUROPE */
-	255:  1252, /* OEM */
-	69:   6969  /* MISC */
+	/*::[*/0/*::]*/:    1252, /* ANSI */
+	/*::[*/1/*::]*/:   65001, /* DEFAULT */
+	/*::[*/2/*::]*/:   65001, /* SYMBOL */
+	/*::[*/77/*::]*/:  10000, /* MAC */
+	/*::[*/128/*::]*/:   932, /* SHIFTJIS */
+	/*::[*/129/*::]*/:   949, /* HANGUL */
+	/*::[*/130/*::]*/:  1361, /* JOHAB */
+	/*::[*/134/*::]*/:   936, /* GB2312 */
+	/*::[*/136/*::]*/:   950, /* CHINESEBIG5 */
+	/*::[*/161/*::]*/:  1253, /* GREEK */
+	/*::[*/162/*::]*/:  1254, /* TURKISH */
+	/*::[*/163/*::]*/:  1258, /* VIETNAMESE */
+	/*::[*/177/*::]*/:  1255, /* HEBREW */
+	/*::[*/178/*::]*/:  1256, /* ARABIC */
+	/*::[*/186/*::]*/:  1257, /* BALTIC */
+	/*::[*/204/*::]*/:  1251, /* RUSSIAN */
+	/*::[*/222/*::]*/:   874, /* THAI */
+	/*::[*/238/*::]*/:  1250, /* EASTEUROPE */
+	/*::[*/255/*::]*/:  1252, /* OEM */
+	/*::[*/69/*::]*/:   6969  /* MISC */
 }/*:any*/);

 var set_ansi = function(cp/*:number*/) { if(VALID_ANSI.indexOf(cp) == -1) return; current_ansi = CS2CP[0] = cp; };
@ -41,11 +45,6 @@ function utf16leread(data/*:string*/)/*:string*/ {
 	for(var i = 0; i < (data.length>>1); ++i) o[i] = String.fromCharCode(data.charCodeAt(2*i) + (data.charCodeAt(2*i+1)<<8));
 	return o.join("");
 }
-function utf16lereadu(data/*:Uint8Array*/)/*:string*/ {
-	var o/*:Array<string>*/ = [];
-	for(var i = 0; i < (data.length>>1); ++i) o[i] = String.fromCharCode(data[2*i] + (data[2*i+1]<<8));
-	return o.join("");
-}
 function utf16beread(data/*:string*/)/*:string*/ {
 	var o/*:Array<string>*/ = [];
 	for(var i = 0; i < (data.length>>1); ++i) o[i] = String.fromCharCode(data.charCodeAt(2*i+1) + (data.charCodeAt(2*i)<<8));
@ -62,9 +61,7 @@ var debom = function(data/*:string*/)/*:string*/ {

 var _getchar = function _gc1(x/*:number*/)/*:string*/ { return String.fromCharCode(x); };
 var _getansi = function _ga1(x/*:number*/)/*:string*/ { return String.fromCharCode(x); };
-
-function set_cptable(cptable) {
-	$cptable = cptable;
+if(typeof $cptable !== 'undefined') {
 	set_cp = function(cp/*:number*/) { current_codepage = cp; set_ansi(cp); };
 	debom = function(data/*:string*/) {
 		if(data.charCodeAt(0) === 0xFF && data.charCodeAt(1) === 0xFE) { return $cptable.utils.decode(1200, char_codes(data.slice(2))); }
@ -77,5 +74,4 @@ function set_cptable(cptable) {
 	_getansi = function _ga2(x/*:number*/)/*:string*/ {
 		return $cptable.utils.decode(current_ansi, [x])[0];
 	};
-	cpdoit();
 }
--- a/bits/04_base64.js
+++ b/bits/04_base64.js
@ -19,60 +19,9 @@ function Base64_encode(input) {
  }
  return o;
 }
-function Base64_encode_pass(input) {
-  var o = "";
-  var c1 = 0, c2 = 0, c3 = 0, e1 = 0, e2 = 0, e3 = 0, e4 = 0;
-  for (var i = 0; i < input.length; ) {
-    c1 = input.charCodeAt(i++);
-    if (c1 > 255)
-      c1 = 95;
-    e1 = c1 >> 2;
-    c2 = input.charCodeAt(i++);
-    if (c2 > 255)
-      c2 = 95;
-    e2 = (c1 & 3) << 4 | c2 >> 4;
-    c3 = input.charCodeAt(i++);
-    if (c3 > 255)
-      c3 = 95;
-    e3 = (c2 & 15) << 2 | c3 >> 6;
-    e4 = c3 & 63;
-    if (isNaN(c2)) {
-      e3 = e4 = 64;
-    } else if (isNaN(c3)) {
-      e4 = 64;
-    }
-    o += Base64_map.charAt(e1) + Base64_map.charAt(e2) + Base64_map.charAt(e3) + Base64_map.charAt(e4);
-  }
-  return o;
-}
-function Base64_encode_arr(input) {
-  var o = "";
-  var c1 = 0, c2 = 0, c3 = 0, e1 = 0, e2 = 0, e3 = 0, e4 = 0;
-  for (var i = 0; i < input.length; ) {
-    c1 = input[i++];
-    e1 = c1 >> 2;
-    c2 = input[i++];
-    e2 = (c1 & 3) << 4 | c2 >> 4;
-    c3 = input[i++];
-    e3 = (c2 & 15) << 2 | c3 >> 6;
-    e4 = c3 & 63;
-    if (isNaN(c2)) {
-      e3 = e4 = 64;
-    } else if (isNaN(c3)) {
-      e4 = 64;
-    }
-    o += Base64_map.charAt(e1) + Base64_map.charAt(e2) + Base64_map.charAt(e3) + Base64_map.charAt(e4);
-  }
-  return o;
-}
 function Base64_decode(input) {
  var o = "";
  var c1 = 0, c2 = 0, c3 = 0, e1 = 0, e2 = 0, e3 = 0, e4 = 0;
-  if (input.slice(0, 5) == "data:") {
-    var i = input.slice(0, 1024).indexOf(";base64,");
-    if (i > -1)
-      input = input.slice(i + 8);
-  }
  input = input.replace(/[^\w\+\/\=]/g, "");
  for (var i = 0; i < input.length; ) {
    e1 = Base64_map.indexOf(input.charAt(i++));
--- a/bits/05_buf.js
+++ b/bits/05_buf.js
@ -8,13 +8,6 @@ var Buffer_from = /*#__PURE__*/(function() {
 	}
 	return function() {};
 })();
-var buf_utf16le = /*#__PURE__*/(function() {
-	if(typeof Buffer === 'undefined') return false;
-	var x = Buffer_from([65,0]);
-	if(!x) return false;
-	var o = x.toString("utf16le");
-	return o.length == 1;
-})();


 function new_raw_buf(len/*:number*/) {
@ -71,7 +64,7 @@ var bconcat = has_buf ? function(bufs) { return Buffer.concat(bufs.map(function(
 		for(i = 0, maxlen = 0; i < bufs.length; maxlen += len, ++i) {
 			len = bufs[i].length;
 			if(bufs[i] instanceof Uint8Array) o.set(bufs[i], maxlen);
-			else if(typeof bufs[i] == "string") o.set(new Uint8Array(s2a(bufs[i])), maxlen);
+			else if(typeof bufs[i] == "string") { throw "wtf"; }
 			else o.set(new Uint8Array(bufs[i]), maxlen);
 		}
 		return o;
--- a/bits/10_ssf.js
+++ b/bits/10_ssf.js
@ -173,20 +173,8 @@ function SSF_frac(x/*:number*/, D/*:number*/, mixed/*:?boolean*/)/*:Array<number
 	var q = Math.floor(sgn * P/Q);
 	return [q, sgn*P - q*Q, Q];
 }
-function SSF_normalize_xl_unsafe(v/*:number*/)/*:number*/ {
-	var s = v.toPrecision(16);
-	if(s.indexOf("e") > -1) {
-		var m = s.slice(0, s.indexOf("e"));
-		m = m.indexOf(".") > -1 ? m.slice(0, (m.slice(0,2) == "0." ? 17 : 16)) : (m.slice(0,15) + fill("0", m.length - 15));
-		return m + s.slice(s.indexOf("e"));
-	}
-	var n = s.indexOf(".") > -1 ? s.slice(0, (s.slice(0,2) == "0." ? 17 : 16)) : (s.slice(0,15) + fill("0", s.length - 15));
-	return Number(n);
-}
-
 function SSF_parse_date_code(v/*:number*/,opts/*:?any*/,b2/*:?boolean*/) {
 	if(v > 2958465 || v < 0) return null;
-	v = SSF_normalize_xl_unsafe(v);
 	var date = (v|0), time = Math.floor(86400 * (v - date)), dow=0;
 	var dout=[];
 	var out={D:date, T:time, u:86400*(v-date)-time,y:0,m:0,d:0,H:0,M:0,S:0,q:0};
@ -215,6 +203,15 @@ function SSF_parse_date_code(v/*:number*/,opts/*:?any*/,b2/*:?boolean*/) {
 	out.q = dow;
 	return out;
 }
+var SSFbasedate = /*#__PURE__*/new Date(1899, 11, 31, 0, 0, 0);
+var SSFdnthresh = /*#__PURE__*/SSFbasedate.getTime();
+var SSFbase1904 = /*#__PURE__*/new Date(1900, 2, 1, 0, 0, 0);
+function datenum_local(v/*:Date*/, date1904/*:?boolean*/)/*:number*/ {
+	var epoch = /*#__PURE__*/v.getTime();
+	if(date1904) epoch -= 1461*24*60*60*1000;
+	else if(v >= SSFbase1904) epoch += 24*60*60*1000;
+	return (epoch - (SSFdnthresh + (/*#__PURE__*/v.getTimezoneOffset() - /*#__PURE__*/SSFbasedate.getTimezoneOffset()) * 60000)) / (24 * 60 * 60 * 1000);
+}
 /* ECMA-376 18.8.30 numFmt*/
 /* Note: `toPrecision` uses standard form when prec > E and E >= -6 */
 /* exponent >= -9 and <= 9 */
@ -272,7 +269,7 @@ function SSF_general(v/*:any*/, opts/*:any*/) {
 		case 'undefined': return "";
 		case 'object':
 			if(v == null) return "";
-			if(v instanceof Date) return SSF_format(14, datenum(v, opts && opts.date1904), opts);
+			if(v instanceof Date) return SSF_format(14, datenum_local(v, opts && opts.date1904), opts);
 	}
 	throw new Error("unsupported value in General format: " + v);
 }
@ -340,7 +337,7 @@ function SSF_write_date(type/*:number*/, fmt/*:string*/, val, ss0/*:?number*/)/*
 		switch(fmt) {
 			case '[h]': case '[hh]': out = val.D*24+val.H; break;
 			case '[m]': case '[mm]': out = (val.D*24+val.H)*60+val.M; break;
-			case '[s]': case '[ss]': out = ((val.D*24+val.H)*60+val.M)*60+(ss0 == 0 ? Math.round(val.S+val.u) : val.S); break;
+			case '[s]': case '[ss]': out = ((val.D*24+val.H)*60+val.M)*60+Math.round(val.S+val.u); break;
 			default: throw 'bad abstime format: ' + fmt;
 		} outl = fmt.length === 3 ? 1 : 2; break;
 		case 101: /* 'e' era */
@ -408,7 +405,7 @@ function write_num_f2(r/*:Array<string>*/, aval/*:number*/, sign/*:string*/)/*:s
 	return sign + (aval === 0 ? "" : ""+aval) + fill(" ", r[1].length + 2 + r[4].length);
 }
 var dec1 = /^#*0*\.([0#]+)/;
-var closeparen = /\)[^)]*[0#]/;
+var closeparen = /\).*[0#]/;
 var phone = /\(###\) ###\\?-####/;
 function hashq(str/*:string*/)/*:string*/ {
 	var o = "", cc;
@ -737,7 +734,7 @@ function eval_fmt(fmt/*:string*/, v/*:any*/, opts/*:any*/, flen/*:number*/) {
 			case 'A': case 'a': case '上':
 				var q={t:c, v:c};
 				if(dt==null) dt=SSF_parse_date_code(v, opts);
-				if(fmt.substr(i, 3).toUpperCase() === "A/P") { if(dt!=null) q.v = dt.H >= 12 ? fmt.charAt(i+2) : c; q.t = 'T'; hr='h';i+=3;}
+				if(fmt.substr(i, 3).toUpperCase() === "A/P") { if(dt!=null) q.v = dt.H >= 12 ? "P" : "A"; q.t = 'T'; hr='h';i+=3;}
 				else if(fmt.substr(i,5).toUpperCase() === "AM/PM") { if(dt!=null) q.v = dt.H >= 12 ? "PM" : "AM"; q.t = 'T'; i+=5; hr='h'; }
 				else if(fmt.substr(i,5).toUpperCase() === "上午/下午") { if(dt!=null) q.v = dt.H >= 12 ? "下午" : "上午"; q.t = 'T'; i+=5; hr='h'; }
 				else { q.t = "t"; ++i; }
@ -788,11 +785,10 @@ function eval_fmt(fmt/*:string*/, v/*:any*/, opts/*:any*/, flen/*:number*/) {
 		switch(out[i].t) {
 			case 'h': case 'H': out[i].t = hr; lst='h'; if(bt < 1) bt = 1; break;
 			case 's':
-				if((ssm=out[i].v.match(/\.0+$/))) { ss0=Math.max(ss0,ssm[0].length-1); bt = 4;}
+				if((ssm=out[i].v.match(/\.0+$/))) ss0=Math.max(ss0,ssm[0].length-1);
 				if(bt < 3) bt = 3;
 			/* falls through */
-			case 'd': case 'y': case 'e': lst=out[i].t; break;
-			case 'M': lst=out[i].t; if(bt < 2) bt = 2; break;
+			case 'd': case 'y': case 'M': case 'e': lst=out[i].t; break;
 			case 'm': if(lst === 's') { out[i].t = 'M'; if(bt < 2) bt = 2; } break;
 			case 'X': /*if(out[i].v === "B2");*/
 				break;
@ -802,29 +798,19 @@ function eval_fmt(fmt/*:string*/, v/*:any*/, opts/*:any*/, flen/*:number*/) {
 				if(bt < 3 && out[i].v.match(/[Ss]/)) bt = 3;
 		}
 	}
-
 	/* time rounding depends on presence of minute / second / usec fields */
-	var _dt;
 	switch(bt) {
 		case 0: break;
 		case 1:
-		case 2:
-		case 3:
+			/*::if(!dt) break;*/
 			if(dt.u >= 0.5) { dt.u = 0; ++dt.S; }
 			if(dt.S >=  60) { dt.S = 0; ++dt.M; }
 			if(dt.M >=  60) { dt.M = 0; ++dt.H; }
-			if(dt.H >=  24) { dt.H = 0; ++dt.D; _dt = SSF_parse_date_code(dt.D); _dt.u = dt.u; _dt.S = dt.S; _dt.M = dt.M; _dt.H = dt.H; dt = _dt; }
 			break;
-		case 4:
-			switch(ss0) {
-				case 1: dt.u = Math.round(dt.u * 10)/10; break;
-				case 2: dt.u = Math.round(dt.u * 100)/100; break;
-				case 3: dt.u = Math.round(dt.u * 1000)/1000; break;
-			}
-			if(dt.u >=   1) { dt.u = 0; ++dt.S; }
+		case 2:
+			/*::if(!dt) break;*/
+			if(dt.u >= 0.5) { dt.u = 0; ++dt.S; }
 			if(dt.S >=  60) { dt.S = 0; ++dt.M; }
-			if(dt.M >=  60) { dt.M = 0; ++dt.H; }
-			if(dt.H >=  24) { dt.H = 0; ++dt.D; _dt = SSF_parse_date_code(dt.D); _dt.u = dt.u; _dt.S = dt.S; _dt.M = dt.M; _dt.H = dt.H; dt = _dt; }
 			break;
 	}

@ -971,7 +957,7 @@ function SSF_format(fmt/*:string|number*/,v/*:any*/,o/*:?any*/) {
 			break;
 	}
 	if(SSF_isgeneral(sfmt,0)) return SSF_general(v, o);
-	if(v instanceof Date) v = datenum(v, o.date1904);
+	if(v instanceof Date) v = datenum_local(v, o.date1904);
 	var f = choose_fmt(sfmt, v);
 	if(SSF_isgeneral(f[1])) return SSF_general(v, o);
 	if(v === true) v = "TRUE"; else if(v === false) v = "FALSE";
--- a/bits/11_ssfutils.js
+++ b/bits/11_ssfutils.js
@ -43,7 +43,6 @@ var dateNFregex = /[dD]+|[mM]+|[yYeE]+|[Hh]+|[Ss]+/g;
 function dateNF_regex(dateNF/*:string|number*/)/*:RegExp*/ {
 	var fmt = typeof dateNF == "number" ? table_fmt[dateNF] : dateNF;
 	fmt = fmt.replace(dateNFregex, "(\\d+)");
-	dateNFregex.lastIndex = 0;
 	return new RegExp("^" + fmt + "$");
 }
 function dateNF_fix(str/*:string*/, dateNF/*:string*/, match/*:Array<string>*/)/*:string*/ {
@ -56,7 +55,6 @@ function dateNF_fix(str/*:string*/, dateNF/*:string*/, match/*:Array<string>*/)/
 			case 'm': if(H >= 0) M = v; else m = v; break;
 		}
 	});
-	dateNFregex.lastIndex = 0;
 	if(S >= 0 && M == -1 && m >= 0) { M = m; m = -1; }
 	var datestr = (("" + (Y>=0?Y: new Date().getFullYear())).slice(-4) + "-" + ("00" + (m>=1?m:1)).slice(-2) + "-" + ("00" + (d>=1?d:1)).slice(-2));
 	if(datestr.length == 7) datestr = "0" + datestr;
@ -67,12 +65,3 @@ function dateNF_fix(str/*:string*/, dateNF/*:string*/, match/*:Array<string>*/)/
 	return datestr + "T" + timestr;
 }

-/* table of bad formats written by third-party tools */
-var bad_formats = {
-	"d.m": "d\\.m" // Issue #2571 Google Sheets writes invalid format 'd.m', correct format is 'd"."m' or 'd\\.m'
-};
-
-function SSF__load(fmt, idx) {
-	return SSF_load(bad_formats[fmt] || fmt, idx);
-}
-
--- a/bits/18_cfb.js
+++ b/bits/18_cfb.js
@ -73,7 +73,7 @@ function slice_by_16_tables(T) {
 		for(c = 256 + n; c < 4096; c += 256) v = table[c] = (v >>> 8) ^ T[v & 0xFF];
 	}
 	var out = [];
-	for(n = 1; n != 16; ++n) out[n - 1] = typeof Int32Array !== 'undefined' && typeof table.subarray == "function" ? table.subarray(n * 256, n * 256 + 256) : table.slice(n * 256, n * 256 + 256);
+	for(n = 1; n != 16; ++n) out[n - 1] = typeof Int32Array !== 'undefined' ? table.subarray(n * 256, n * 256 + 256) : table.slice(n * 256, n * 256 + 256);
 	return out;
 }
 var TT = slice_by_16_tables(T0);
@ -133,7 +133,7 @@ return CRC32;
 /* [MS-CFB] v20171201 */
 var CFB = /*#__PURE__*/(function _CFB(){
 var exports/*:CFBModule*/ = /*::(*/{}/*:: :any)*/;
-exports.version = '1.2.2';
+exports.version = '1.2.1';
 /* [MS-CFB] 2.6.4 */
 function namecmp(l/*:string*/, r/*:string*/)/*:number*/ {
 	var L = l.split("/"), R = r.split("/");
@ -211,15 +211,8 @@ function parse_extra_field(blob/*:CFBlob*/)/*:any*/ {
 					if(flags & 4) p.ctime = blob.read_shift(4);
 				}
 				if(p.mtime) p.mt = new Date(p.mtime*1000);
-			} break;
-			/* ZIP64 Extended Information Field */
-			case 0x0001: {
-				var sz1 = blob.read_shift(4), sz2 = blob.read_shift(4);
-				p.usz = (sz2 * Math.pow(2,32) + sz1);
-				sz1 = blob.read_shift(4); sz2 = blob.read_shift(4);
-				p.csz = (sz2 * Math.pow(2,32) + sz1);
-				// NOTE: volume fields are skipped
-			} break;
+			}
+			break;
 		}
 		blob.l = tgt;
 		o[type] = p;
@ -227,7 +220,7 @@ function parse_extra_field(blob/*:CFBlob*/)/*:any*/ {
 	return o;
 }
 var fs/*:: = require('fs'); */;
-function get_fs() { return fs || (fs = _fs); }
+function get_fs() { return fs || (fs = require('fs')); }
 function parse(file/*:RawBytes*/, options/*:CFBReadOpts*/)/*:CFBContainer*/ {
 if(file[0] == 0x50 && file[1] == 0x4b) return parse_zip(file, options);
 if((file[0] | 0x20) == 0x6d && (file[1]|0x20) == 0x69) return parse_mad(file, options);
@ -306,7 +299,7 @@ sleuth_fat(difat_start, difat_sec_cnt, sectors, ssz, fat_addrs);
 /** Chains */
 var sector_list/*:SectorList*/ = make_sector_list(sectors, dir_start, fat_addrs, ssz);

-if(dir_start < sector_list.length) sector_list[dir_start].name = "!Directory";
+sector_list[dir_start].name = "!Directory";
 if(nmfs > 0 && minifat_start !== ENDOFCHAIN) sector_list[minifat_start].name = "!MiniFAT";
 sector_list[fat_addrs[0]].name = "!FAT";
 sector_list.fat_addrs = fat_addrs;
@ -440,7 +433,7 @@ function sleuth_fat(idx/*:number*/, cnt/*:number*/, sectors/*:Array<RawBytes>*/,
 			if((q = __readInt32LE(sector,i*4)) === ENDOFCHAIN) break;
 			fat_addrs.push(q);
 		}
-		if(cnt >= 1) sleuth_fat(__readInt32LE(sector,ssz-4),cnt - 1, sectors, ssz, fat_addrs);
+		sleuth_fat(__readInt32LE(sector,ssz-4),cnt - 1, sectors, ssz, fat_addrs);
 	}
 }

@ -616,9 +609,7 @@ function rebuild_cfb(cfb/*:CFBContainer*/, f/*:?boolean*/)/*:void*/ {
 	for(i = 0; i < data.length; ++i) {
 		var dad = dirname(data[i][0]);
 		s = fullPaths[dad];
-		while(!s) {
-			while(dirname(dad) && !fullPaths[dirname(dad)]) dad = dirname(dad);
-
+		if(!s) {
 			data.push([dad, ({
 				name: filename(dad).replace("/",""),
 				type: 1,
@ -626,12 +617,8 @@ function rebuild_cfb(cfb/*:CFBContainer*/, f/*:?boolean*/)/*:void*/ {
 				ct: now, mt: now,
 				content: null
 			}/*:any*/)]);
-
 			// Add name to set
 			fullPaths[dad] = true;
-
-			dad = dirname(data[i][0]);
-			s = fullPaths[dad];
 		}
 	}

@ -679,6 +666,7 @@ function _write(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes|strin
 		for(var i = 0; i < cfb.FileIndex.length; ++i) {
 			var file = cfb.FileIndex[i];
 			if(!file.content) continue;
+			/*:: if(file.content == null) throw new Error("unreachable"); */
 			var flen = file.content.length;
 			if(flen > 0){
 				if(flen < 0x1000) mini_size += (flen + 0x3F) >> 6;
@ -769,10 +757,6 @@ function _write(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes|strin
 		file = cfb.FileIndex[i];
 		if(i === 0) file.start = file.size ? file.start - 1 : ENDOFCHAIN;
 		var _nm/*:string*/ = (i === 0 && _opts.root) || file.name;
-		if(_nm.length > 31) {
-			console.error("Name " + _nm + " will be truncated to " + _nm.slice(0,31));
-			_nm = _nm.slice(0, 31);
-		}
 		flen = 2*(_nm.length+1);
 		o.write_shift(64, _nm, "utf16le");
 		o.write_shift(2, flen);
@ -1408,15 +1392,9 @@ function parse_zip(file/*:RawBytes*/, options/*:CFBReadOpts*/)/*:CFBContainer*/

 		var L = blob.l;
 		blob.l = offset + 4;
-		/* ZIP64 lengths */
-		if(EF && EF[0x0001]) {
-			if((EF[0x0001]||{}).usz) usz = EF[0x0001].usz;
-			if((EF[0x0001]||{}).csz) csz = EF[0x0001].csz;
-		}
 		parse_local_file(blob, csz, usz, o, EF);
 		blob.l = L;
 	}
-
 	return o;
 }

@ -1442,13 +1420,7 @@ function parse_local_file(blob/*:CFBlob*/, csz/*:number*/, usz/*:number*/, o/*:C
 	if(efsz) {
 		var ef = parse_extra_field(/*::(*/blob.slice(blob.l, blob.l + efsz)/*:: :any)*/);
 		if((ef[0x5455]||{}).mt) date = ef[0x5455].mt;
-		if((ef[0x0001]||{}).usz) _usz = ef[0x0001].usz;
-		if((ef[0x0001]||{}).csz) _csz = ef[0x0001].csz;
-		if(EF) {
-			if((EF[0x5455]||{}).mt) date = EF[0x5455].mt;
-			if((EF[0x0001]||{}).usz) _usz = ef[0x0001].usz;
-			if((EF[0x0001]||{}).csz) _csz = ef[0x0001].csz;
-		}
+		if(((EF||{})[0x5455]||{}).mt) date = EF[0x5455].mt;
 	}
 	blob.l += efsz;

@ -1500,9 +1472,9 @@ function write_zip(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes*/
 		var namebuf = new_buf(fp.length);
 		for(j = 0; j < fp.length; ++j) namebuf.write_shift(1, fp.charCodeAt(j) & 0x7F);
 		namebuf = namebuf.slice(0, namebuf.l);
-		crcs[fcnt] = typeof fi.content == "string" ? CRC32.bstr(fi.content, 0) : CRC32.buf(/*::((*/fi.content/*::||[]):any)*/, 0);
+		crcs[fcnt] = CRC32.buf(/*::((*/fi.content/*::||[]):any)*/, 0);

-		var outbuf = typeof fi.content == "string" ? s2a(fi.content) : fi.content/*::||[]*/;
+		var outbuf = fi.content/*::||[]*/;
 		if(method == 8) outbuf = _deflateRawSync(outbuf);

 		/* local file header */
@ -1683,7 +1655,7 @@ function parse_mime(cfb/*:CFBContainer*/, data/*:Array<string>*/, root/*:string*
 	for(;di < 10; ++di) {
 		var line = data[di];
 		if(!line || line.match(/^\s*$/)) break;
-		var m = line.match(/^([^:]*?):\s*([^\s].*)$/);
+		var m = line.match(/^(.*?):\s*([^\s].*)$/);
 		if(m) switch(m[1].toLowerCase()) {
 			case "content-location": fname = m[2].trim(); break;
 			case "content-type": ctype = m[2].trim(); break;
--- a/bits/19_fsutils.js
+++ b/bits/19_fsutils.js
@ -1,5 +1,5 @@
 var _fs;
-function set_fs(fs) { _fs = fs; }
+if(typeof require !== 'undefined') try { _fs = require('fs'); } catch(e) {}

 /* normalize data for blob ctor */
 function blobify(data) {
@ -35,7 +35,7 @@ function write_dl(fname/*:string*/, payload/*:any*/, enc/*:?string*/) {
 			/*:: declare var chrome: any; */
 			if(typeof chrome === 'object' && typeof (chrome.downloads||{}).download == "function") {
 				if(URL.revokeObjectURL && typeof setTimeout !== 'undefined') setTimeout(function() { URL.revokeObjectURL(url); }, 60000);
-				return chrome.downloads.download({ url: url, filename: fname, saveAs: true });
+				return chrome.downloads.download({ url: url, filename: fname, saveAs: true});
 			}
 			var a = document.createElement("a");
 			if(a.download != null) {
@ -45,10 +45,6 @@ function write_dl(fname/*:string*/, payload/*:any*/, enc/*:?string*/) {
 				if(URL.revokeObjectURL && typeof setTimeout !== 'undefined') setTimeout(function() { URL.revokeObjectURL(url); }, 60000);
 				return url;
 			}
-		} else if(typeof URL !== 'undefined' && !URL.createObjectURL && typeof chrome === 'object') {
-			/* manifest v3 extensions -- no URL.createObjectURL */
-			var b64 = "data:application/octet-stream;base64," + Base64_encode_arr(new Uint8Array(blobify(data)));
-			return chrome.downloads.download({ url: b64, filename: fname, saveAs: true });
 		}
 	}
 	// $FlowIgnore
@ -57,7 +53,7 @@ function write_dl(fname/*:string*/, payload/*:any*/, enc/*:?string*/) {
 		var out = File(fname); out.open("w"); out.encoding = "binary";
 		if(Array.isArray(payload)) payload = a2s(payload);
 		out.write(payload); out.close(); return payload;
-	} catch(e) { if(!e.message || e.message.indexOf("onstruct") == -1) throw e; }
+	} catch(e) { if(!e.message || !e.message.match(/onstruct/)) throw e; }
 	throw new Error("cannot save file " + fname);
 }

@ -71,6 +67,6 @@ function read_binary(path/*:string*/) {
 		var infile = File(path); infile.open("r"); infile.encoding = "binary";
 		var data = infile.read(); infile.close();
 		return data;
-	} catch(e) { if(!e.message || e.message.indexOf("onstruct") == -1) throw e; }
+	} catch(e) { if(!e.message || !e.message.match(/onstruct/)) throw e; }
 	throw new Error("Cannot access file " + path);
 }
--- a/bits/20_jsutils.js
+++ b/bits/20_jsutils.js
@ -31,19 +31,22 @@ function evert_arr(obj/*:any*/)/*:EvertArrType*/ {
 	return o;
 }

-var dnthresh  = /*#__PURE__*/Date.UTC(1899, 11, 30, 0, 0, 0); // -2209161600000
-var dnthresh1 = /*#__PURE__*/Date.UTC(1899, 11, 31, 0, 0, 0); // -2209075200000
-var dnthresh2 = /*#__PURE__*/Date.UTC(1904, 0, 1, 0, 0, 0); // -2209075200000
+var basedate = /*#__PURE__*/new Date(1899, 11, 30, 0, 0, 0); // 2209161600000
 function datenum(v/*:Date*/, date1904/*:?boolean*/)/*:number*/ {
 	var epoch = /*#__PURE__*/v.getTime();
-	var res = (epoch - dnthresh) / (24 * 60 * 60 * 1000);
-	if(date1904) { res -= 1462; return res < -1402 ? res - 1 : res; }
-	return res < 60 ? res - 1 : res;
+	if(date1904) epoch -= 1462*24*60*60*1000;
+	var dnthresh = /*#__PURE__*/basedate.getTime() + (/*#__PURE__*/v.getTimezoneOffset() - /*#__PURE__*/basedate.getTimezoneOffset()) * 60000;
+	return (epoch - dnthresh) / (24 * 60 * 60 * 1000);
 }
-function numdate(v/*:number*/)/*:Date|number*/ {
-	if(v >= 60 && v < 61) return v;
+var refdate = /*#__PURE__*/new Date();
+var dnthresh = /*#__PURE__*/basedate.getTime() + (/*#__PURE__*/refdate.getTimezoneOffset() - /*#__PURE__*/basedate.getTimezoneOffset()) * 60000;
+var refoffset = /*#__PURE__*/refdate.getTimezoneOffset();
+function numdate(v/*:number*/)/*:Date*/ {
 	var out = new Date();
-	out.setTime((v>60 ? v : (v+1)) * 24 * 60 * 60 * 1000 + dnthresh);
+	out.setTime(v * 24 * 60 * 60 * 1000 + dnthresh);
+	if (out.getTimezoneOffset() !== refoffset) {
+		out.setTime(out.getTime() + (out.getTimezoneOffset() - refoffset) * 60000);
+	}
 	return out;
 }

@ -74,28 +77,33 @@ function parse_isodur(s) {
 	return sec;
 }

-/* Blame https://bugs.chromium.org/p/v8/issues/detail?id=7863 for the regexide */
-var pdre1 = /^(\d+):(\d+)(:\d+)?(\.\d+)?$/; // HH:MM[:SS[.UUU]]
-var pdre2 = /^(\d+)-(\d+)-(\d+)$/; // YYYY-mm-dd
-var pdre3 = /^(\d+)-(\d+)-(\d+)[T ](\d+):(\d+)(:\d+)?(\.\d+)?$/; // YYYY-mm-dd(T or space)HH:MM[:SS[.UUU]], sans "Z"
-/* parses a date string as a UTC date */
-function parseDate(str/*:string*/, date1904/*:boolean*/)/*:Date*/ {
-	if(str instanceof Date) return str;
-	var m = str.match(pdre1);
-	if(m) return new Date((date1904 ? dnthresh2 : dnthresh1) + ((parseInt(m[1], 10)*60 + parseInt(m[2], 10))*60 + (m[3] ? parseInt(m[3].slice(1), 10) : 0))*1000 + (m[4] ? parseInt((m[4]+"000").slice(1,4), 10) : 0));
-	m = str.match(pdre2);
-	if(m) return new Date(Date.UTC(+m[1], +m[2]-1, +m[3], 0, 0, 0, 0));
-	/* TODO: 1900-02-29T00:00:00.000 should return a flag to treat as a date code (affects xlml) */
-	m = str.match(pdre3);
-	if(m) return new Date(Date.UTC(+m[1], +m[2]-1, +m[3], +m[4], +m[5], ((m[6] && parseInt(m[6].slice(1), 10))|| 0), ((m[7] && parseInt((m[7] + "0000").slice(1,4), 10))||0)));
+var good_pd_date_1 = /*#__PURE__*/new Date('2017-02-19T19:06:09.000Z');
+var good_pd_date = /*#__PURE__*/isNaN(/*#__PURE__*/good_pd_date_1.getFullYear()) ? /*#__PURE__*/new Date('2/19/17') : good_pd_date_1;
+var good_pd = /*#__PURE__*/good_pd_date.getFullYear() == 2017;
+/* parses a date as a local date */
+function parseDate(str/*:string|Date*/, fixdate/*:?number*/)/*:Date*/ {
 	var d = new Date(str);
-	return d;
+	if(good_pd) {
+		/*:: if(fixdate == null) fixdate = 0; */
+		if(fixdate > 0) d.setTime(d.getTime() + d.getTimezoneOffset() * 60 * 1000);
+		else if(fixdate < 0) d.setTime(d.getTime() - d.getTimezoneOffset() * 60 * 1000);
+		return d;
+	}
+	if(str instanceof Date) return str;
+	if(good_pd_date.getFullYear() == 1917 && !isNaN(d.getFullYear())) {
+		var s = d.getFullYear();
+		if(str.indexOf("" + s) > -1) return d;
+		d.setFullYear(d.getFullYear() + 100); return d;
+	}
+	var n = str.match(/\d+/g)||["2017","2","19","0","0","0"];
+	var out = new Date(+n[0], +n[1] - 1, +n[2], (+n[3]||0), (+n[4]||0), (+n[5]||0));
+	if(str.indexOf("Z") > -1) out = new Date(out.getTime() - out.getTimezoneOffset() * 60 * 1000);
+	return out;
 }

 function cc2str(arr/*:Array<number>*/, debomit)/*:string*/ {
 	if(has_buf && Buffer.isBuffer(arr)) {
-		if(debomit && buf_utf16le) {
-			// TODO: temporary patch
+		if(debomit) {
 			if(arr[0] == 0xFF && arr[1] == 0xFE) return utf8write(arr.slice(2).toString("utf16le"));
 			if(arr[1] == 0xFE && arr[2] == 0xFF) return utf8write(utf16beread(arr.slice(2).toString("binary")));
 		}
@ -120,18 +128,8 @@ function cc2str(arr/*:Array<number>*/, debomit)/*:string*/ {
 		return new TextDecoder("latin1").decode(arr).replace(/[€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ]/g, function(c) { return rev[c] || c; });
 	} catch(e) {}

-	var o = [], i = 0;
-	// this cascade is for the browsers and runtimes of antiquity (and for modern runtimes that lack TextEncoder)
-	try {
-		for(i = 0; i < arr.length - 65536; i+=65536) o.push(String.fromCharCode.apply(0, arr.slice(i, i + 65536)));
-		o.push(String.fromCharCode.apply(0, arr.slice(i)));
-	} catch(e) { try {
-			for(; i < arr.length - 16384; i+=16384) o.push(String.fromCharCode.apply(0, arr.slice(i, i + 16384)));
-			o.push(String.fromCharCode.apply(0, arr.slice(i)));
-		} catch(e) {
-			for(; i != arr.length; ++i) o.push(String.fromCharCode(arr[i]));
-		}
-	}
+	var o = [];
+	for(var i = 0; i != arr.length; ++i) o.push(String.fromCharCode(arr[i]));
 	return o.join("");
 }

@ -154,56 +152,23 @@ function fuzzynum(s/*:string*/)/*:number*/ {
 	var wt = 1;
 	var ss = s.replace(/([\d]),([\d])/g,"$1$2").replace(/[$]/g,"").replace(/[%]/g, function() { wt *= 100; return "";});
 	if(!isNaN(v = Number(ss))) return v / wt;
-	ss = ss.replace(/[(]([^()]*)[)]/,function($$, $1) { wt = -wt; return $1;});
+	ss = ss.replace(/[(](.*)[)]/,function($$, $1) { wt = -wt; return $1;});
 	if(!isNaN(v = Number(ss))) return v / wt;
 	return v;
 }
-
-/* NOTE: Chrome rejects bare times like 1:23 PM */
-var FDRE1 = /^(0?\d|1[0-2])(?:|:([0-5]?\d)(?:|(\.\d+)(?:|:([0-5]?\d))|:([0-5]?\d)(|\.\d+)))\s+([ap])m?$/;
-var FDRE2 = /^([01]?\d|2[0-3])(?:|:([0-5]?\d)(?:|(\.\d+)(?:|:([0-5]?\d))|:([0-5]?\d)(|\.\d+)))$/;
-var FDISO = /^(\d+)-(\d+)-(\d+)[T ](\d+):(\d+)(:\d+)(\.\d+)?[Z]?$/; // YYYY-mm-dd(T or space)HH:MM:SS[.UUU][Z]
-
-/* TODO: 1904 adjustment */
-var utc_append_works = new Date("6/9/69 00:00 UTC").valueOf() == -17798400000;
-function fuzzytime1(M) /*:Date*/ {
-	if(!M[2]) return new Date(Date.UTC(1899,11,31,(+M[1]%12) + (M[7] == "p" ? 12 : 0), 0, 0, 0));
-	if(M[3]) {
-			if(M[4]) return new Date(Date.UTC(1899,11,31,(+M[1]%12) + (M[7] == "p" ? 12 : 0), +M[2], +M[4], parseFloat(M[3])*1000));
-			else return new Date(Date.UTC(1899,11,31,(M[7] == "p" ? 12 : 0), +M[1], +M[2], parseFloat(M[3])*1000));
-	}
-	else if(M[5]) return new Date(Date.UTC(1899,11,31, (+M[1]%12) + (M[7] == "p" ? 12 : 0), +M[2], +M[5], M[6] ? parseFloat(M[6]) * 1000 : 0));
-	else return new Date(Date.UTC(1899,11,31,(+M[1]%12) + (M[7] == "p" ? 12 : 0), +M[2], 0, 0));
-}
-function fuzzytime2(M) /*:Date*/ {
-	if(!M[2]) return new Date(Date.UTC(1899,11,31,+M[1], 0, 0, 0));
-	if(M[3]) {
-			if(M[4]) return new Date(Date.UTC(1899,11,31,+M[1], +M[2], +M[4], parseFloat(M[3])*1000));
-			else return new Date(Date.UTC(1899,11,31,0, +M[1], +M[2], parseFloat(M[3])*1000));
-	}
-	else if(M[5]) return new Date(Date.UTC(1899,11,31, +M[1], +M[2], +M[5], M[6] ? parseFloat(M[6]) * 1000 : 0));
-	else return new Date(Date.UTC(1899,11,31,+M[1], +M[2], 0, 0));
-}
 var lower_months = ['january', 'february', 'march', 'april', 'may', 'june', 'july', 'august', 'september', 'october', 'november', 'december'];
 function fuzzydate(s/*:string*/)/*:Date*/ {
-	// See issue 2863 -- this is technically not supported in Excel but is otherwise useful
-	if(FDISO.test(s)) return s.indexOf("Z") == -1 ? local_to_utc(new Date(s)) : new Date(s);
-	var lower = s.toLowerCase();
-	var lnos = lower.replace(/\s+/g, " ").trim();
-	var M = lnos.match(FDRE1);
-	if(M) return fuzzytime1(M);
-	M = lnos.match(FDRE2);
-	if(M) return fuzzytime2(M);
-	M = lnos.match(pdre3);
-	if(M) return new Date(Date.UTC(+M[1], +M[2]-1, +M[3], +M[4], +M[5], ((M[6] && parseInt(M[6].slice(1), 10))|| 0), ((M[7] && parseInt((M[7] + "0000").slice(1,4), 10))||0)));
-	var o = new Date(utc_append_works && s.indexOf("UTC") == -1 ? s + " UTC": s), n = new Date(NaN);
+	var o = new Date(s), n = new Date(NaN);
 	var y = o.getYear(), m = o.getMonth(), d = o.getDate();
 	if(isNaN(d)) return n;
+	var lower = s.toLowerCase();
 	if(lower.match(/jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec/)) {
 		lower = lower.replace(/[^a-z]/g,"").replace(/([^a-z]|^)[ap]m?([^a-z]|$)/,"");
 		if(lower.length > 3 && lower_months.indexOf(lower) == -1) return n;
-	} else if(lower.replace(/[ap]m?/, "").match(/[a-z]/)) return n;
-	if(y < 0 || y > 8099 || s.match(/[^-0-9:,\/\\\ ]/)) return n;
+	} else if(lower.match(/[a-z]/)) return n;
+	if(y < 0 || y > 8099) return n;
+	if((m > 0 || d > 1) && y != 101) return o;
+	if(s.match(/[^-0-9:,\/\\]/)) return n;
 	return o;
 }

@ -216,165 +181,3 @@ var split_regex = /*#__PURE__*/(function() {
 		return o;
 	};
 })();
-
-function utc_to_local(utc) {
-	return new Date(utc.getUTCFullYear(), utc.getUTCMonth(), utc.getUTCDate(), utc.getUTCHours(), utc.getUTCMinutes(), utc.getUTCSeconds(), utc.getUTCMilliseconds());
-}
-function local_to_utc(local) {
-	return new Date(Date.UTC(local.getFullYear(), local.getMonth(), local.getDate(), local.getHours(), local.getMinutes(), local.getSeconds(), local.getMilliseconds()));
-}
-
-function remove_doctype(str) {
-	var preamble = str.slice(0, 1024);
-	var si = preamble.indexOf("<!DOCTYPE");
-	if(si == -1) return str;
-	var m = str.match(/<[\w]/);
-	if(!m) return str;
-	return str.slice(0, si) + str.slice(m.index);
-}
-
-/* str.match(/<!--[\s\S]*?-->/g) --> str_match_ng(str, "<!--", "-->") */
-function str_match_ng(str, s, e) {
-  var out = [];
-
-  var si = str.indexOf(s);
-  while(si > -1) {
-    var ei = str.indexOf(e, si + s.length);
-		if(ei == -1) break;
-
-		out.push(str.slice(si, ei + e.length));
-		si = str.indexOf(s, ei + e.length);
-	}
-
-  return out.length > 0 ? out : null;
-}
-
-/* str.replace(/<!--[\s\S]*?-->/g, "") --> str_remove_ng(str, "<!--", "-->") */
-function str_remove_ng(str, s, e) {
-  var out = [], last = 0;
-
-  var si = str.indexOf(s);
-	if(si == -1) return str;
-  while(si > -1) {
-		out.push(str.slice(last, si));
-    var ei = str.indexOf(e, si + s.length);
-		if(ei == -1) break;
-
-		if((si = str.indexOf(s, (last = ei + e.length))) == -1) out.push(str.slice(last));
-	}
-
-  return out.join("");
-}
-
-/* str.match(/<tag\b[^>]*?>([\s\S]*?)</tag>/) --> str_match_xml(str, "tag") */
-var xml_boundary = { " ": 1, "\t": 1, "\r": 1, "\n": 1, ">": 1 };
-function str_match_xml(str, tag) {
-	var si = str.indexOf('<' + tag), w = tag.length + 1, L = str.length;
-	while(si >= 0 && si <= L - w && !xml_boundary[str.charAt(si + w)]) si = str.indexOf('<' + tag, si+1);
-	if(si === -1) return null;
-	var sf = str.indexOf(">", si + tag.length);
-	if(sf === -1) return null;
-	var et = "</" + tag + ">";
-	var ei = str.indexOf(et, sf);
-	if(ei == -1) return null;
-	return [str.slice(si, ei + et.length), str.slice(sf + 1, ei)];
-}
-
-/* str.match(/<(?:\w+:)?tag\b[^<>]*?>([\s\S]*?)<\/(?:\w+:)?tag>/) --> str_match_xml(str, "tag") */
-var str_match_xml_ns = /*#__PURE__*/(function() {
-	var str_match_xml_ns_cache = {};
-	return function str_match_xml_ns(str, tag) {
-		var res = str_match_xml_ns_cache[tag];
-		if(!res) str_match_xml_ns_cache[tag] = res = [
-			new RegExp('<(?:\\w+:)?'+tag+'\\b[^<>]*>', "g"),
-			new RegExp('</(?:\\w+:)?'+tag+'>', "g")
-		];
-		res[0].lastIndex = res[1].lastIndex = 0;
-		var m = res[0].exec(str);
-		if(!m) return null;
-		var si = m.index;
-		var sf = res[0].lastIndex;
-		res[1].lastIndex = res[0].lastIndex;
-		m = res[1].exec(str);
-		if(!m) return null;
-		var ei = m.index;
-		var ef = res[1].lastIndex;
-		return [str.slice(si, ef), str.slice(sf, ei)];
-	};
-})();
-
-/* str.match(/<(?:\w+:)?tag\b[^<>]*?>([\s\S]*?)<\/(?:\w+:)?tag>/g) --> str_match_xml_ns_g(str, "tag") */
-var str_match_xml_ns_g = /*#__PURE__*/(function() {
-	var str_match_xml_ns_cache = {};
-	return function str_match_xml_ns(str, tag) {
-		var out = [];
-		var res = str_match_xml_ns_cache[tag];
-		if(!res) str_match_xml_ns_cache[tag] = res = [
-			new RegExp('<(?:\\w+:)?'+tag+'\\b[^<>]*>', "g"),
-			new RegExp('</(?:\\w+:)?'+tag+'>', "g")
-		];
-		res[0].lastIndex = res[1].lastIndex = 0;
-		var m;
-		while((m = res[0].exec(str))) {
-			var si = m.index;
-			res[1].lastIndex = res[0].lastIndex;
-			m = res[1].exec(str);
-			if(!m) return null;
-			var ef = res[1].lastIndex;
-			out.push(str.slice(si, ef));
-			res[0].lastIndex = res[1].lastIndex;
-		}
-		return out.length == 0 ? null : out;
-	};
-})();
-var str_remove_xml_ns_g = /*#__PURE__*/(function() {
-	var str_remove_xml_ns_cache = {};
-	return function str_remove_xml_ns_g(str, tag) {
-		var out = [];
-		var res = str_remove_xml_ns_cache[tag];
-		if(!res) str_remove_xml_ns_cache[tag] = res = [
-			new RegExp('<(?:\\w+:)?'+tag+'\\b[^<>]*>', "g"),
-			new RegExp('</(?:\\w+:)?'+tag+'>', "g")
-		];
-		res[0].lastIndex = res[1].lastIndex = 0;
-		var m;
-		var si = 0, ef = 0;
-		while((m = res[0].exec(str))) {
-			si = m.index;
-			out.push(str.slice(ef, si));
-			ef = si;
-			res[1].lastIndex = res[0].lastIndex;
-			m = res[1].exec(str);
-			if(!m) return null;
-			ef = res[1].lastIndex;
-			res[0].lastIndex = res[1].lastIndex;
-		}
-		out.push(str.slice(ef));
-		return out.length == 0 ? "" : out.join("");
-	};
-})();
-
-/* str.match(/<(?:\w+:)?tag\b[^>]*?>([\s\S]*?)<\/(?:\w+:)?tag>/gi) --> str_match_xml_ns_ig(str, "tag") */
-var str_match_xml_ig = /*#__PURE__*/(function() {
-	var str_match_xml_ns_cache = {};
-	return function str_match_xml_ns(str, tag) {
-		var out = [];
-		var res = str_match_xml_ns_cache[tag];
-		if(!res) str_match_xml_ns_cache[tag] = res = [
-			new RegExp('<'+tag+'\\b[^<>]*>', "ig"),
-			new RegExp('</'+tag+'>', "ig")
-		];
-		res[0].lastIndex = res[1].lastIndex = 0;
-		var m;
-		while((m = res[0].exec(str))) {
-			var si = m.index;
-			res[1].lastIndex = res[0].lastIndex;
-			m = res[1].exec(str);
-			if(!m) return null;
-			var ef = res[1].lastIndex;
-			out.push(str.slice(si, ef));
-			res[0].lastIndex = res[1].lastIndex;
-		}
-		return out.length == 0 ? null : out;
-	};
-})();
--- a/bits/22_xmlutils.js
+++ b/bits/22_xmlutils.js
@ -1,6 +1,6 @@
 var XML_HEADER = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\r\n';
-var attregexg=/\s([^"\s?>\/]+)\s*=\s*((?:")([^"]*)(?:")|(?:')([^']*)(?:')|([^'">\s]+))/g;
-var tagregex1=/<[\/\?]?[a-zA-Z0-9:_-]+(?:\s+[^"\s?<>\/]+\s*=\s*(?:"[^"]*"|'[^']*'|[^'"<>\s=]+))*\s*[\/\?]?>/mg, tagregex2 = /<[^<>]*>/g;
+var attregexg=/([^"\s?>\/]+)\s*=\s*((?:")([^"]*)(?:")|(?:')([^']*)(?:')|([^'">\s]+))/g;
+var tagregex1=/<[\/\?]?[a-zA-Z0-9:_-]+(?:\s+[^"\s?>\/]+\s*=\s*(?:"[^"]*"|'[^']*'|[^'">\s=]+))*\s*[\/\?]?>/mg, tagregex2 = /<[^>]*>/g;
 var tagregex = /*#__PURE__*/XML_HEADER.match(tagregex1) ? tagregex1 : tagregex2;
 var nsregex=/<\w*:/, nsregex2 = /<(\/?)\w+:/;
 function parsexmltag(tag/*:string*/, skip_root/*:?boolean*/, skip_LC/*:?boolean*/)/*:any*/ {
@ -11,7 +11,7 @@ function parsexmltag(tag/*:string*/, skip_root/*:?boolean*/, skip_LC/*:?boolean*
 	if(eq === tag.length) return z;
 	var m = tag.match(attregexg), j=0, v="", i=0, q="", cc="", quot = 1;
 	if(m) for(i = 0; i != m.length; ++i) {
-		cc = m[i].slice(1);
+		cc = m[i];
 		for(c=0; c != cc.length; ++c) if(cc.charCodeAt(c) === 61) break;
 		q = cc.slice(0,c).trim();
 		while(cc.charCodeAt(c+1) == 32) ++c;
@ -48,19 +48,15 @@ var rencoding = /*#__PURE__*/evert(encodings);
 var unescapexml/*:StringConv*/ = /*#__PURE__*/(function() {
 	/* 22.4.2.4 bstr (Basic String) */
 	var encregex = /&(?:quot|apos|gt|lt|amp|#x?([\da-fA-F]+));/ig, coderegex = /_x([\da-fA-F]{4})_/ig;
-	function raw_unescapexml(text/*:string*/)/*:string*/ {
+	return function unescapexml(text/*:string*/)/*:string*/ {
 		var s = text + '', i = s.indexOf("<![CDATA[");
 		if(i == -1) return s.replace(encregex, function($$, $1) { return encodings[$$]||String.fromCharCode(parseInt($1,$$.indexOf("x")>-1?16:10))||$$; }).replace(coderegex,function(m,c) {return String.fromCharCode(parseInt(c,16));});
 		var j = s.indexOf("]]>");
-		return raw_unescapexml(s.slice(0, i)) + s.slice(i+9,j) + raw_unescapexml(s.slice(j+3));
-	}
-	return function unescapexml(text/*:string*/, xlsx/*:boolean*/) {
-		var out = raw_unescapexml(text);
-		return xlsx ? out.replace(/\r\n/g, "\n") : out;
+		return unescapexml(s.slice(0, i)) + s.slice(i+9,j) + unescapexml(s.slice(j+3));
 	};
 })();

-var decregex=/[&<>'"]/g, charegex = /[\u0000-\u0008\u000b-\u001f\uFFFE-\uFFFF]/g;
+var decregex=/[&<>'"]/g, charegex = /[\u0000-\u0008\u000b-\u001f]/g;
 function escapexml(text/*:string*/)/*:string*/{
 	var s = text + '';
 	return s.replace(decregex, function(y) { return rencoding[y]; }).replace(charegex,function(s) { return "_x" + ("000"+s.charCodeAt(0).toString(16)).slice(-4) + "_";});
@ -86,14 +82,12 @@ var xlml_fixstr/*:StringConv*/ = /*#__PURE__*/(function() {
 })();
 function xlml_unfixstr(str/*:string*/)/*:string*/ { return str.replace(/(\r\n|[\r\n])/g,"\&#10;"); }

-/* note: xsd:boolean valid values: true / 1 / false / 0 */
 function parsexmlbool(value/*:any*/)/*:boolean*/ {
 	switch(value) {
-		case 1: case true:  case '1': case 'true':  return true;
-		case 0: case false: case '0': case 'false': return false;
-		//default: throw new Error("Invalid xsd:boolean " + value);
+		case 1: case true: case '1': case 'true': case 'TRUE': return true;
+		/* case '0': case 'false': case 'FALSE':*/
+		default: return false;
 	}
-	return false;
 }

 function utf8reada(orig/*:string*/)/*:string*/ {
@ -161,6 +155,16 @@ var utf8write/*:StringConv*/ = has_buf ? function(data) { return Buffer_from(dat
 	return out.join("");
 };

+// matches <foo>...</foo> extracts content
+var matchtag = /*#__PURE__*/(function() {
+	var mtcache/*:{[k:string]:RegExp}*/ = ({}/*:any*/);
+	return function matchtag(f/*:string*/,g/*:?string*/)/*:RegExp*/ {
+		var t = f+"|"+(g||"");
+		if(mtcache[t]) return mtcache[t];
+		return (mtcache[t] = new RegExp('<(?:\\w+:)?'+f+'(?: xml:space="preserve")?(?:[^>]*)>([\\s\\S]*?)</(?:\\w+:)?'+f+'>',((g||"")/*:any*/)));
+	};
+})();
+
 var htmldecode/*:{(s:string):string}*/ = /*#__PURE__*/(function() {
 	var entities/*:Array<[RegExp, string]>*/ = [
 		['nbsp', ' '], ['middot', '·'],
@ -171,25 +175,30 @@ var htmldecode/*:{(s:string):string}*/ = /*#__PURE__*/(function() {
 				// Remove new lines and spaces from start of content
 				.replace(/^[\t\n\r ]+/, "")
 				// Remove new lines and spaces from end of content
-				.replace(/(^|[^\t\n\r ])[\t\n\r ]+$/,"$1")
+				.replace(/[\t\n\r ]+$/,"")
 				// Added line which removes any white space characters after and before html tags
-				.replace(/>\s+/g,">").replace(/\b\s+</g,"<")
+				.replace(/>\s+/g,">").replace(/\s+</g,"<")
 				// Replace remaining new lines and spaces with space
 				.replace(/[\t\n\r ]+/g, " ")
 				// Replace <br> tags with new lines
 				.replace(/<\s*[bB][rR]\s*\/?>/g,"\n")
 				// Strip HTML elements
-				.replace(/<[^<>]*>/g,"");
+				.replace(/<[^>]*>/g,"");
 		for(var i = 0; i < entities.length; ++i) o = o.replace(entities[i][0], entities[i][1]);
 		return o;
 	};
 })();

-var vtvregex = /<\/?(?:vt:)?variant>/g, vtmregex = /<(?:vt:)([^<"'>]*)>([\s\S]*)</;
+var vtregex = /*#__PURE__*/(function(){ var vt_cache = {};
+	return function vt_regex(bt) {
+		if(vt_cache[bt] !== undefined) return vt_cache[bt];
+		return (vt_cache[bt] = new RegExp("<(?:vt:)?" + bt + ">([\\s\\S]*?)</(?:vt:)?" + bt + ">", 'g') );
+};})();
+var vtvregex = /<\/?(?:vt:)?variant>/g, vtmregex = /<(?:vt:)([^>]*)>([\s\S]*)</;
 function parseVector(data/*:string*/, opts)/*:Array<{v:string,t:string}>*/ {
 	var h = parsexmltag(data);

-	var matches/*:Array<string>*/ = str_match_xml_ns_g(data, h.baseType)||[];
+	var matches/*:Array<string>*/ = data.match(vtregex(h.baseType))||[];
 	var res/*:Array<any>*/ = [];
 	if(matches.length != h.size) {
 		if(opts.WTF) throw new Error("unexpected vector length " + matches.length + " != " + h.size);
@ -230,8 +239,9 @@ function xlml_normalize(d)/*:string*/ {
 	if(typeof Uint8Array !== 'undefined' && d instanceof Uint8Array) return utf8read(a2s(ab2a(d)));
 	throw new Error("Bad input format: expected Buffer or string");
 }
-/* UOS uses CJK in tags, ODS uses invalid XML */
-var xlmlregex = /<([\/]?)([^\s?><!\/:"]*:|)([^\s?<>:\/"]+)(?:\s+[^<>=?"'\s]+="[^"]*?")*\s*[\/]?>/mg;
+/* UOS uses CJK in tags */
+var xlmlregex = /<(\/?)([^\s?><!\/:]*:|)([^\s?<>:\/]+)(?:[\s?:\/][^>]*)?>/mg;
+//var xlmlregex = /<(\/?)([a-z0-9]*:|)(\w+)[^>]*>/mg;

 var XMLNS = ({
 	CORE_PROPS: 'http://schemas.openxmlformats.org/package/2006/metadata/core-properties',
--- a/bits/23_binutils.js
+++ b/bits/23_binutils.js
@ -29,7 +29,7 @@ var ___toBuffer = function(bufs/*:Array<Array<RawBytes> >*/)/*:RawBytes*/ { var
 var __toBuffer = has_buf ? function(bufs) { return (bufs[0].length > 0 && Buffer.isBuffer(bufs[0][0])) ? Buffer.concat(bufs[0].map(function(x) { return Buffer.isBuffer(x) ? x : Buffer_from(x); })) : ___toBuffer(bufs);} : ___toBuffer;

 var ___utf16le = function(b/*:RawBytes|CFBlob*/,s/*:number*/,e/*:number*/)/*:string*/ { var ss/*:Array<string>*/=[]; for(var i=s; i<e; i+=2) ss.push(String.fromCharCode(__readUInt16LE(b,i))); return ss.join("").replace(chr0,''); };
-var __utf16le = has_buf ? function(b/*:RawBytes|CFBlob*/,s/*:number*/,e/*:number*/)/*:string*/ { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/ || !buf_utf16le) return ___utf16le(b,s,e); return b.toString('utf16le',s,e).replace(chr0,'')/*.replace(chr1,'!')*/; } : ___utf16le;
+var __utf16le = has_buf ? function(b/*:RawBytes|CFBlob*/,s/*:number*/,e/*:number*/)/*:string*/ { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/) return ___utf16le(b,s,e); return b.toString('utf16le',s,e).replace(chr0,'')/*.replace(chr1,'!')*/; } : ___utf16le;

 var ___hexlify = function(b/*:RawBytes|CFBlob*/,s/*:number*/,l/*:number*/)/*:string*/ { var ss/*:Array<string>*/=[]; for(var i=s; i<s+l; ++i) ss.push(("0" + b[i].toString(16)).slice(-2)); return ss.join(""); };
 var __hexlify = has_buf ? function(b/*:RawBytes|CFBlob*/,s/*:number*/,l/*:number*/)/*:string*/ { return Buffer.isBuffer(b)/*:: && b instanceof Buffer*/ ? b.toString('hex',s,s+l) : ___hexlify(b,s,l); } : ___hexlify;
@ -60,8 +60,8 @@ var is_buf = function is_buf_a(a) { return Array.isArray(a) || (typeof Uint8Arra
 if(has_buf/*:: && typeof Buffer !== 'undefined'*/) {
 	__lpstr = function lpstr_b(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/) return ___lpstr(b, i); var len = b.readUInt32LE(i); return len > 0 ? b.toString('utf8',i+4,i+4+len-1) : "";};
 	__cpstr = function cpstr_b(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/) return ___cpstr(b, i); var len = b.readUInt32LE(i); return len > 0 ? b.toString('utf8',i+4,i+4+len-1) : "";};
-	__lpwstr = function lpwstr_b(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/ || !buf_utf16le) return ___lpwstr(b, i); var len = 2*b.readUInt32LE(i); return b.toString('utf16le',i+4,i+4+len-1);};
-	__lpp4 = function lpp4_b(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/ || !buf_utf16le) return ___lpp4(b, i); var len = b.readUInt32LE(i); return b.toString('utf16le',i+4,i+4+len);};
+	__lpwstr = function lpwstr_b(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/) return ___lpwstr(b, i); var len = 2*b.readUInt32LE(i); return b.toString('utf16le',i+4,i+4+len-1);};
+	__lpp4 = function lpp4_b(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/) return ___lpp4(b, i); var len = b.readUInt32LE(i); return b.toString('utf16le',i+4,i+4+len);};
 	__8lpp4 = function lpp4_8b(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(!Buffer.isBuffer(b)/*:: || !(b instanceof Buffer)*/) return ___8lpp4(b, i); var len = b.readUInt32LE(i); return b.toString('utf8',i+4,i+4+len);};
 	__double = function double_(b/*:RawBytes|CFBlob*/, i/*:number*/) { if(Buffer.isBuffer(b)/*::&& b instanceof Buffer*/) return b.readDoubleLE(i); return ___double(b,i); };
 	is_buf = function is_buf_b(a) { return Buffer.isBuffer(a) || Array.isArray(a) || (typeof Uint8Array !== "undefined" && a instanceof Uint8Array); };
@ -91,7 +91,7 @@ function ReadShift(size/*:number*/, t/*:?string*/)/*:number|string*/ {
 	switch(t) {
 		case 'dbcs':
 			loc = this.l;
-			if(has_buf && Buffer.isBuffer(this)  && buf_utf16le) o = this.slice(this.l, this.l+2*size).toString("utf16le");
+			if(has_buf && Buffer.isBuffer(this)) o = this.slice(this.l, this.l+2*size).toString("utf16le");
 			else for(i = 0; i < size; ++i) { o+=String.fromCharCode(__readUInt16LE(this, loc)); loc+=2; }
 			size *= 2;
 			break;
@ -181,29 +181,21 @@ function WriteShift(t/*:number*/, val/*:string|number*/, f/*:?string*/)/*:any*/
 		/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 		for(i = 0; i != val.length; ++i) __writeUInt16LE(this, val.charCodeAt(i), this.l + 2 * i);
 		size = 2 * val.length;
-	} else if(f === 'sbcs' || f == 'cpstr') {
+	} else if(f === 'sbcs') {
 		if(typeof $cptable !== 'undefined' && current_ansi == 874) {
 			/* TODO: use tables directly, don't encode */
 			/*:: if(typeof val !== "string") throw new Error("unreachable"); */
 			for(i = 0; i != val.length; ++i) {
-				var cpp = $cptable.utils.encode(current_ansi, val.charAt(i));
-				this[this.l + i] = cpp[0];
+				var cppayload = $cptable.utils.encode(current_ansi, val.charAt(i));
+				this[this.l + i] = cppayload[0];
 			}
-			size = val.length;
-		} else if(typeof $cptable !== 'undefined' && f == 'cpstr') {
-			cpp = $cptable.utils.encode(current_codepage, val);
-			/* replace null bytes with _ when relevant */
-      if(cpp.length == val.length) for(i = 0; i < val.length; ++i) if(cpp[i] == 0 && val.charCodeAt(i) != 0) cpp[i] = 0x5F;
-      if(cpp.length == 2 * val.length) for(i = 0; i < val.length; ++i) if(cpp[2*i] == 0 && cpp[2*i+1] == 0 && val.charCodeAt(i) != 0) cpp[2*i] = 0x5F;
-			for(i = 0; i < cpp.length; ++i) this[this.l + i] = cpp[i];
-			size = cpp.length;
 		} else {
 			/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 			val = val.replace(/[^\x00-\x7F]/g, "_");
 			/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 			for(i = 0; i != val.length; ++i) this[this.l + i] = (val.charCodeAt(i) & 0xFF);
-			size = val.length;
 		}
+		size = val.length;
 	} else if(f === 'hex') {
 		for(; i < t; ++i) {
 			/*:: if(typeof val !== "string") throw new Error("unreachable"); */
--- a/bits/24_hoppers.js
+++ b/bits/24_hoppers.js
@ -31,11 +31,8 @@ function buf_array()/*:BufArray*/ {

 	var endbuf = function ba_endbuf() {
 		if(!curbuf) return;
-		// workaround for new Buffer(3).slice(0,0) bug in bun 0.1.3
-		if(curbuf.l) {
-			if(curbuf.length > curbuf.l) { curbuf = curbuf.slice(0, curbuf.l); curbuf.l = curbuf.length; }
-			if(curbuf.length > 0) bufs.push(curbuf);
-		}
+		if(curbuf.length > curbuf.l) { curbuf = curbuf.slice(0, curbuf.l); curbuf.l = curbuf.length; }
+		if(curbuf.length > 0) bufs.push(curbuf);
 		curbuf = null;
 	};

--- a/bits/26_cptable.js
+++ b/bits/26_cptable.js
@ -1,4 +0,0 @@
-if(typeof cptable !== 'undefined') set_cptable(cptable);
-else if(typeof module !== "undefined" && typeof require !== 'undefined') {
-	set_cptable(require('./dist/cpexcel.js'));
-}
--- a/bits/27_csfutils.js
+++ b/bits/27_csfutils.js
@ -9,6 +9,7 @@ function fix_col(cstr/*:string*/)/*:string*/ { return cstr.replace(/^([A-Z])/,"$
 function unfix_col(cstr/*:string*/)/*:string*/ { return cstr.replace(/^\$([A-Z])/,"$1"); }

 function split_cell(cstr/*:string*/)/*:Array<string>*/ { return cstr.replace(/(\$?[A-Z]*)(\$?\d*)/,"$1,$2").split(","); }
+//function decode_cell(cstr/*:string*/)/*:CellAddress*/ { var splt = split_cell(cstr); return { c:decode_col(splt[0]), r:decode_row(splt[1]) }; }
 function decode_cell(cstr/*:string*/)/*:CellAddress*/ {
 	var R = 0, C = 0;
 	for(var i = 0; i < cstr.length; ++i) {
@ -18,6 +19,7 @@ function decode_cell(cstr/*:string*/)/*:CellAddress*/ {
 	}
 	return { c: C - 1, r:R - 1 };
 }
+//function encode_cell(cell/*:CellAddress*/)/*:string*/ { return encode_col(cell.c) + encode_row(cell.r); }
 function encode_cell(cell/*:CellAddress*/)/*:string*/ {
 	var col = cell.c + 1;
 	var s="";
@ -42,17 +44,6 @@ function encode_range(cs/*:CellAddrSpec|Range*/,ce/*:?CellAddrSpec*/)/*:string*/
 /*:: if(typeof ce !== 'string') throw "unreachable"; */
 	return cs == ce ? cs : cs + ":" + ce;
 }
-function fix_range(a1/*:string*/)/*:string*/ {
-	var s = decode_range(a1);
-	return "$" + encode_col(s.s.c) + "$" + encode_row(s.s.r) + ":$" + encode_col(s.e.c) + "$" + encode_row(s.e.r);
-}
-
-// List of invalid characters needs to be tested further
-function formula_quote_sheet_name(sname/*:string*/, opts)/*:string*/ {
-	if(!sname && !(opts && opts.biff <= 5 && opts.biff >= 2)) throw new Error("empty sheet name");
-	if (/[^\w\u4E00-\u9FFF\u3040-\u30FF]/.test(sname)) return "'" + sname.replace(/'/g, "''") + "'";
-	return sname;
-}

 function safe_decode_range(range/*:string*/)/*:Range*/ {
 	var o = {s:{c:0,r:0},e:{c:0,r:0}};
@ -108,19 +99,11 @@ function sheet_to_workbook(sheet/*:Worksheet*/, opts)/*:Workbook*/ {
 	return { SheetNames: [n], Sheets: sheets };
 }

-function sheet_new(opts) {
-	var out = {};
-	var o = opts || {};
-	if(o.dense) out["!data"] = [];
-	return out;
-}
-
 function sheet_add_aoa(_ws/*:?Worksheet*/, data/*:AOA*/, opts/*:?any*/)/*:Worksheet*/ {
 	var o = opts || {};
-	var dense = _ws ? (_ws["!data"] != null) : o.dense;
+	var dense = _ws ? Array.isArray(_ws) : o.dense;
 	if(DENSE != null && dense == null) dense = DENSE;
-	var ws/*:Worksheet*/ = _ws || ({}/*:any*/);
-	if(dense && !ws["!data"]) ws["!data"] = [];
+	var ws/*:Worksheet*/ = _ws || (dense ? ([]/*:any*/) : ({}/*:any*/));
 	var _R = 0, _C = 0;
 	if(ws && o.origin != null) {
 		if(typeof o.origin == 'number') _R = o.origin;
@ -128,37 +111,28 @@ function sheet_add_aoa(_ws/*:?Worksheet*/, data/*:AOA*/, opts/*:?any*/)/*:Worksh
 			var _origin/*:CellAddress*/ = typeof o.origin == "string" ? decode_cell(o.origin) : o.origin;
 			_R = _origin.r; _C = _origin.c;
 		}
+		if(!ws["!ref"]) ws["!ref"] = "A1:A1";
 	}
 	var range/*:Range*/ = ({s: {c:10000000, r:10000000}, e: {c:0, r:0}}/*:any*/);
-	if(ws["!ref"]){
+	if(ws['!ref']) {
 		var _range = safe_decode_range(ws['!ref']);
 		range.s.c = _range.s.c;
 		range.s.r = _range.s.r;
 		range.e.c = Math.max(range.e.c, _range.e.c);
 		range.e.r = Math.max(range.e.r, _range.e.r);
-		if(_R == -1) range.e.r = _R = (ws["!ref"] ? _range.e.r + 1 : 0);
-	} else {
-		range.s.c = range.e.c = range.s.r = range.e.r = 0;
+		if(_R == -1) range.e.r = _R = _range.e.r + 1;
 	}
-	var row = [], seen = false;
 	for(var R = 0; R != data.length; ++R) {
 		if(!data[R]) continue;
 		if(!Array.isArray(data[R])) throw new Error("aoa_to_sheet expects an array of arrays");
-		var __R = _R + R, __Rstr = "" + (__R + 1);
-		//console.log("!!", R, _R, __R);
-		if(dense) {
-			if(!ws["!data"][__R]) ws["!data"][__R] = [];
-			row = ws["!data"][__R];
-		}
 		for(var C = 0; C != data[R].length; ++C) {
 			if(typeof data[R][C] === 'undefined') continue;
 			var cell/*:Cell*/ = ({v: data[R][C] }/*:any*/);
-			var __C = _C + C;
+			var __R = _R + R, __C = _C + C;
 			if(range.s.r > __R) range.s.r = __R;
 			if(range.s.c > __C) range.s.c = __C;
 			if(range.e.r < __R) range.e.r = __R;
 			if(range.e.c < __C) range.e.c = __C;
-			seen = true;
 			if(data[R][C] && typeof data[R][C] === 'object' && !Array.isArray(data[R][C]) && !(data[R][C] instanceof Date)) cell = data[R][C];
 			else {
 				if(Array.isArray(cell.v)) { cell.f = data[R][C][1]; cell.v = cell.v[0]; }
@ -172,23 +146,23 @@ function sheet_add_aoa(_ws/*:?Worksheet*/, data/*:AOA*/, opts/*:?any*/)/*:Worksh
 				else if(typeof cell.v === 'boolean') cell.t = 'b';
 				else if(cell.v instanceof Date) {
 					cell.z = o.dateNF || table_fmt[14];
-					if(!o.UTC) cell.v = local_to_utc(cell.v);
-					if(o.cellDates) { cell.t = 'd'; cell.w = SSF_format(cell.z, datenum(cell.v, o.date1904)); }
-					else { cell.t = 'n'; cell.v = datenum(cell.v, o.date1904); cell.w = SSF_format(cell.z, cell.v); }
+					if(o.cellDates) { cell.t = 'd'; cell.w = SSF_format(cell.z, datenum(cell.v)); }
+					else { cell.t = 'n'; cell.v = datenum(cell.v); cell.w = SSF_format(cell.z, cell.v); }
 				}
 				else cell.t = 's';
 			}
 			if(dense) {
-				if(row[__C] && row[__C].z) cell.z = row[__C].z;
-				row[__C] = cell;
+				if(!ws[__R]) ws[__R] = [];
+				if(ws[__R][__C] && ws[__R][__C].z) cell.z = ws[__R][__C].z;
+				ws[__R][__C] = cell;
 			} else {
-				var cell_ref = encode_col(__C) + __Rstr/*:any*/;
+				var cell_ref = encode_cell(({c:__C,r:__R}/*:any*/));
 				if(ws[cell_ref] && ws[cell_ref].z) cell.z = ws[cell_ref].z;
 				ws[cell_ref] = cell;
 			}
 		}
 	}
-	if(seen && range.s.c < 10400000) ws['!ref'] = encode_range(range);
+	if(range.s.c < 10000000) ws['!ref'] = encode_range(range);
 	return ws;
 }
 function aoa_to_sheet(data/*:AOA*/, opts/*:?any*/)/*:Worksheet*/ { return sheet_add_aoa(null, data, opts); }
--- a/bits/29_xlsenum.js
+++ b/bits/29_xlsenum.js
@ -21,7 +21,7 @@ var VT_UI4      = 0x0013;
 //var VT_UI8      = 0x0015;
 //var VT_INT      = 0x0016;
 //var VT_UINT     = 0x0017;
-//var VT_LPSTR    = 0x001E;
+var VT_LPSTR    = 0x001E;
 //var VT_LPWSTR   = 0x001F;
 var VT_FILETIME = 0x0040;
 var VT_BLOB     = 0x0041;
@ -33,7 +33,7 @@ var VT_BLOB     = 0x0041;
 var VT_CF       = 0x0047;
 //var VT_CLSID    = 0x0048;
 //var VT_VERSIONED_STREAM = 0x0049;
-//var VT_VECTOR   = 0x1000;
+var VT_VECTOR   = 0x1000;
 var VT_VECTOR_VARIANT = 0x100C;
 var VT_VECTOR_LPSTR   = 0x101E;
 //var VT_ARRAY    = 0x2000;
@ -44,118 +44,118 @@ var VT_CUSTOM   = [VT_STRING, VT_USTR];

 /* [MS-OSHARED] 2.3.3.2.2.1 Document Summary Information PIDDSI */
 var DocSummaryPIDDSI = {
-	0x01: { n: 'CodePage', t: VT_I2 },
-	0x02: { n: 'Category', t: VT_STRING },
-	0x03: { n: 'PresentationFormat', t: VT_STRING },
-	0x04: { n: 'ByteCount', t: VT_I4 },
-	0x05: { n: 'LineCount', t: VT_I4 },
-	0x06: { n: 'ParagraphCount', t: VT_I4 },
-	0x07: { n: 'SlideCount', t: VT_I4 },
-	0x08: { n: 'NoteCount', t: VT_I4 },
-	0x09: { n: 'HiddenCount', t: VT_I4 },
-	0x0a: { n: 'MultimediaClipCount', t: VT_I4 },
-	0x0b: { n: 'ScaleCrop', t: VT_BOOL },
-	0x0c: { n: 'HeadingPairs', t: VT_VECTOR_VARIANT /* VT_VECTOR | VT_VARIANT */ },
-	0x0d: { n: 'TitlesOfParts', t: VT_VECTOR_LPSTR /* VT_VECTOR | VT_LPSTR */ },
-	0x0e: { n: 'Manager', t: VT_STRING },
-	0x0f: { n: 'Company', t: VT_STRING },
-	0x10: { n: 'LinksUpToDate', t: VT_BOOL },
-	0x11: { n: 'CharacterCount', t: VT_I4 },
-	0x13: { n: 'SharedDoc', t: VT_BOOL },
-	0x16: { n: 'HyperlinksChanged', t: VT_BOOL },
-	0x17: { n: 'AppVersion', t: VT_I4, p: 'version' },
-	0x18: { n: 'DigSig', t: VT_BLOB },
-	0x1A: { n: 'ContentType', t: VT_STRING },
-	0x1B: { n: 'ContentStatus', t: VT_STRING },
-	0x1C: { n: 'Language', t: VT_STRING },
-	0x1D: { n: 'Version', t: VT_STRING },
-	0xFF: {},
+	/*::[*/0x01/*::]*/: { n: 'CodePage', t: VT_I2 },
+	/*::[*/0x02/*::]*/: { n: 'Category', t: VT_STRING },
+	/*::[*/0x03/*::]*/: { n: 'PresentationFormat', t: VT_STRING },
+	/*::[*/0x04/*::]*/: { n: 'ByteCount', t: VT_I4 },
+	/*::[*/0x05/*::]*/: { n: 'LineCount', t: VT_I4 },
+	/*::[*/0x06/*::]*/: { n: 'ParagraphCount', t: VT_I4 },
+	/*::[*/0x07/*::]*/: { n: 'SlideCount', t: VT_I4 },
+	/*::[*/0x08/*::]*/: { n: 'NoteCount', t: VT_I4 },
+	/*::[*/0x09/*::]*/: { n: 'HiddenCount', t: VT_I4 },
+	/*::[*/0x0a/*::]*/: { n: 'MultimediaClipCount', t: VT_I4 },
+	/*::[*/0x0b/*::]*/: { n: 'ScaleCrop', t: VT_BOOL },
+	/*::[*/0x0c/*::]*/: { n: 'HeadingPairs', t: VT_VECTOR_VARIANT /* VT_VECTOR | VT_VARIANT */ },
+	/*::[*/0x0d/*::]*/: { n: 'TitlesOfParts', t: VT_VECTOR_LPSTR /* VT_VECTOR | VT_LPSTR */ },
+	/*::[*/0x0e/*::]*/: { n: 'Manager', t: VT_STRING },
+	/*::[*/0x0f/*::]*/: { n: 'Company', t: VT_STRING },
+	/*::[*/0x10/*::]*/: { n: 'LinksUpToDate', t: VT_BOOL },
+	/*::[*/0x11/*::]*/: { n: 'CharacterCount', t: VT_I4 },
+	/*::[*/0x13/*::]*/: { n: 'SharedDoc', t: VT_BOOL },
+	/*::[*/0x16/*::]*/: { n: 'HyperlinksChanged', t: VT_BOOL },
+	/*::[*/0x17/*::]*/: { n: 'AppVersion', t: VT_I4, p: 'version' },
+	/*::[*/0x18/*::]*/: { n: 'DigSig', t: VT_BLOB },
+	/*::[*/0x1A/*::]*/: { n: 'ContentType', t: VT_STRING },
+	/*::[*/0x1B/*::]*/: { n: 'ContentStatus', t: VT_STRING },
+	/*::[*/0x1C/*::]*/: { n: 'Language', t: VT_STRING },
+	/*::[*/0x1D/*::]*/: { n: 'Version', t: VT_STRING },
+	/*::[*/0xFF/*::]*/: {},
 	/* [MS-OLEPS] 2.18 */
-	0x80000000: { n: 'Locale', t: VT_UI4 },
-	0x80000003: { n: 'Behavior', t: VT_UI4 },
-	0x72627262: {}
+	/*::[*/0x80000000/*::]*/: { n: 'Locale', t: VT_UI4 },
+	/*::[*/0x80000003/*::]*/: { n: 'Behavior', t: VT_UI4 },
+	/*::[*/0x72627262/*::]*/: {}
 };

 /* [MS-OSHARED] 2.3.3.2.1.1 Summary Information Property Set PIDSI */
 var SummaryPIDSI = {
-	0x01: { n: 'CodePage', t: VT_I2 },
-	0x02: { n: 'Title', t: VT_STRING },
-	0x03: { n: 'Subject', t: VT_STRING },
-	0x04: { n: 'Author', t: VT_STRING },
-	0x05: { n: 'Keywords', t: VT_STRING },
-	0x06: { n: 'Comments', t: VT_STRING },
-	0x07: { n: 'Template', t: VT_STRING },
-	0x08: { n: 'LastAuthor', t: VT_STRING },
-	0x09: { n: 'RevNumber', t: VT_STRING },
-	0x0A: { n: 'EditTime', t: VT_FILETIME },
-	0x0B: { n: 'LastPrinted', t: VT_FILETIME },
-	0x0C: { n: 'CreatedDate', t: VT_FILETIME },
-	0x0D: { n: 'ModifiedDate', t: VT_FILETIME },
-	0x0E: { n: 'PageCount', t: VT_I4 },
-	0x0F: { n: 'WordCount', t: VT_I4 },
-	0x10: { n: 'CharCount', t: VT_I4 },
-	0x11: { n: 'Thumbnail', t: VT_CF },
-	0x12: { n: 'Application', t: VT_STRING },
-	0x13: { n: 'DocSecurity', t: VT_I4 },
-	0xFF: {},
+	/*::[*/0x01/*::]*/: { n: 'CodePage', t: VT_I2 },
+	/*::[*/0x02/*::]*/: { n: 'Title', t: VT_STRING },
+	/*::[*/0x03/*::]*/: { n: 'Subject', t: VT_STRING },
+	/*::[*/0x04/*::]*/: { n: 'Author', t: VT_STRING },
+	/*::[*/0x05/*::]*/: { n: 'Keywords', t: VT_STRING },
+	/*::[*/0x06/*::]*/: { n: 'Comments', t: VT_STRING },
+	/*::[*/0x07/*::]*/: { n: 'Template', t: VT_STRING },
+	/*::[*/0x08/*::]*/: { n: 'LastAuthor', t: VT_STRING },
+	/*::[*/0x09/*::]*/: { n: 'RevNumber', t: VT_STRING },
+	/*::[*/0x0A/*::]*/: { n: 'EditTime', t: VT_FILETIME },
+	/*::[*/0x0B/*::]*/: { n: 'LastPrinted', t: VT_FILETIME },
+	/*::[*/0x0C/*::]*/: { n: 'CreatedDate', t: VT_FILETIME },
+	/*::[*/0x0D/*::]*/: { n: 'ModifiedDate', t: VT_FILETIME },
+	/*::[*/0x0E/*::]*/: { n: 'PageCount', t: VT_I4 },
+	/*::[*/0x0F/*::]*/: { n: 'WordCount', t: VT_I4 },
+	/*::[*/0x10/*::]*/: { n: 'CharCount', t: VT_I4 },
+	/*::[*/0x11/*::]*/: { n: 'Thumbnail', t: VT_CF },
+	/*::[*/0x12/*::]*/: { n: 'Application', t: VT_STRING },
+	/*::[*/0x13/*::]*/: { n: 'DocSecurity', t: VT_I4 },
+	/*::[*/0xFF/*::]*/: {},
 	/* [MS-OLEPS] 2.18 */
-	0x80000000: { n: 'Locale', t: VT_UI4 },
-	0x80000003: { n: 'Behavior', t: VT_UI4 },
-	0x72627262: {}
+	/*::[*/0x80000000/*::]*/: { n: 'Locale', t: VT_UI4 },
+	/*::[*/0x80000003/*::]*/: { n: 'Behavior', t: VT_UI4 },
+	/*::[*/0x72627262/*::]*/: {}
 };

 /* [MS-XLS] 2.4.63 Country/Region codes */
 var CountryEnum = {
-	0x0001: "US", // United States
-	0x0002: "CA", // Canada
-	0x0003: "", // Latin America (except Brazil)
-	0x0007: "RU", // Russia
-	0x0014: "EG", // Egypt
-	0x001E: "GR", // Greece
-	0x001F: "NL", // Netherlands
-	0x0020: "BE", // Belgium
-	0x0021: "FR", // France
-	0x0022: "ES", // Spain
-	0x0024: "HU", // Hungary
-	0x0027: "IT", // Italy
-	0x0029: "CH", // Switzerland
-	0x002B: "AT", // Austria
-	0x002C: "GB", // United Kingdom
-	0x002D: "DK", // Denmark
-	0x002E: "SE", // Sweden
-	0x002F: "NO", // Norway
-	0x0030: "PL", // Poland
-	0x0031: "DE", // Germany
-	0x0034: "MX", // Mexico
-	0x0037: "BR", // Brazil
-	0x003d: "AU", // Australia
-	0x0040: "NZ", // New Zealand
-	0x0042: "TH", // Thailand
-	0x0051: "JP", // Japan
-	0x0052: "KR", // Korea
-	0x0054: "VN", // Viet Nam
-	0x0056: "CN", // China
-	0x005A: "TR", // Turkey
-	0x0069: "JS", // Ramastan
-	0x00D5: "DZ", // Algeria
-	0x00D8: "MA", // Morocco
-	0x00DA: "LY", // Libya
-	0x015F: "PT", // Portugal
-	0x0162: "IS", // Iceland
-	0x0166: "FI", // Finland
-	0x01A4: "CZ", // Czech Republic
-	0x0376: "TW", // Taiwan
-	0x03C1: "LB", // Lebanon
-	0x03C2: "JO", // Jordan
-	0x03C3: "SY", // Syria
-	0x03C4: "IQ", // Iraq
-	0x03C5: "KW", // Kuwait
-	0x03C6: "SA", // Saudi Arabia
-	0x03CB: "AE", // United Arab Emirates
-	0x03CC: "IL", // Israel
-	0x03CE: "QA", // Qatar
-	0x03D5: "IR", // Iran
-	0xFFFF: "US"  // United States
+	/*::[*/0x0001/*::]*/: "US", // United States
+	/*::[*/0x0002/*::]*/: "CA", // Canada
+	/*::[*/0x0003/*::]*/: "", // Latin America (except Brazil)
+	/*::[*/0x0007/*::]*/: "RU", // Russia
+	/*::[*/0x0014/*::]*/: "EG", // Egypt
+	/*::[*/0x001E/*::]*/: "GR", // Greece
+	/*::[*/0x001F/*::]*/: "NL", // Netherlands
+	/*::[*/0x0020/*::]*/: "BE", // Belgium
+	/*::[*/0x0021/*::]*/: "FR", // France
+	/*::[*/0x0022/*::]*/: "ES", // Spain
+	/*::[*/0x0024/*::]*/: "HU", // Hungary
+	/*::[*/0x0027/*::]*/: "IT", // Italy
+	/*::[*/0x0029/*::]*/: "CH", // Switzerland
+	/*::[*/0x002B/*::]*/: "AT", // Austria
+	/*::[*/0x002C/*::]*/: "GB", // United Kingdom
+	/*::[*/0x002D/*::]*/: "DK", // Denmark
+	/*::[*/0x002E/*::]*/: "SE", // Sweden
+	/*::[*/0x002F/*::]*/: "NO", // Norway
+	/*::[*/0x0030/*::]*/: "PL", // Poland
+	/*::[*/0x0031/*::]*/: "DE", // Germany
+	/*::[*/0x0034/*::]*/: "MX", // Mexico
+	/*::[*/0x0037/*::]*/: "BR", // Brazil
+	/*::[*/0x003d/*::]*/: "AU", // Australia
+	/*::[*/0x0040/*::]*/: "NZ", // New Zealand
+	/*::[*/0x0042/*::]*/: "TH", // Thailand
+	/*::[*/0x0051/*::]*/: "JP", // Japan
+	/*::[*/0x0052/*::]*/: "KR", // Korea
+	/*::[*/0x0054/*::]*/: "VN", // Viet Nam
+	/*::[*/0x0056/*::]*/: "CN", // China
+	/*::[*/0x005A/*::]*/: "TR", // Turkey
+	/*::[*/0x0069/*::]*/: "JS", // Ramastan
+	/*::[*/0x00D5/*::]*/: "DZ", // Algeria
+	/*::[*/0x00D8/*::]*/: "MA", // Morocco
+	/*::[*/0x00DA/*::]*/: "LY", // Libya
+	/*::[*/0x015F/*::]*/: "PT", // Portugal
+	/*::[*/0x0162/*::]*/: "IS", // Iceland
+	/*::[*/0x0166/*::]*/: "FI", // Finland
+	/*::[*/0x01A4/*::]*/: "CZ", // Czech Republic
+	/*::[*/0x0376/*::]*/: "TW", // Taiwan
+	/*::[*/0x03C1/*::]*/: "LB", // Lebanon
+	/*::[*/0x03C2/*::]*/: "JO", // Jordan
+	/*::[*/0x03C3/*::]*/: "SY", // Syria
+	/*::[*/0x03C4/*::]*/: "IQ", // Iraq
+	/*::[*/0x03C5/*::]*/: "KW", // Kuwait
+	/*::[*/0x03C6/*::]*/: "SA", // Saudi Arabia
+	/*::[*/0x03CB/*::]*/: "AE", // United Arab Emirates
+	/*::[*/0x03CC/*::]*/: "IL", // Israel
+	/*::[*/0x03CE/*::]*/: "QA", // Qatar
+	/*::[*/0x03D5/*::]*/: "IR", // Iran
+	/*::[*/0xFFFF/*::]*/: "US"  // United States
 };

 /* [MS-XLS] 2.5.127 */
@ -258,8 +258,8 @@ var _XLSIcv = /*#__PURE__*/ rgbify([
 	0x333333,

 	/* Other entries to appease BIFF8/12 */
-	0x000000, /* 0x40 icvForeground ?? */
-	0xFFFFFF, /* 0x41 icvBackground ?? */
+	0xFFFFFF, /* 0x40 icvForeground ?? */
+	0x000000, /* 0x41 icvBackground ?? */
 	0x000000, /* 0x42 icvFrame ?? */
 	0x000000, /* 0x43 icv3D ?? */
 	0x000000, /* 0x44 icv3DText ?? */
@ -281,15 +281,15 @@ var XLSIcv = /*#__PURE__*/dup(_XLSIcv);

 /* [MS-XLSB] 2.5.97.2 */
 var BErr = {
-	0x00: "#NULL!",
-	0x07: "#DIV/0!",
-	0x0F: "#VALUE!",
-	0x17: "#REF!",
-	0x1D: "#NAME?",
-	0x24: "#NUM!",
-	0x2A: "#N/A",
-	0x2B: "#GETTING_DATA",
-	0xFF: "#WTF?"
+	/*::[*/0x00/*::]*/: "#NULL!",
+	/*::[*/0x07/*::]*/: "#DIV/0!",
+	/*::[*/0x0F/*::]*/: "#VALUE!",
+	/*::[*/0x17/*::]*/: "#REF!",
+	/*::[*/0x1D/*::]*/: "#NAME?",
+	/*::[*/0x24/*::]*/: "#NUM!",
+	/*::[*/0x2A/*::]*/: "#N/A",
+	/*::[*/0x2B/*::]*/: "#GETTING_DATA",
+	/*::[*/0xFF/*::]*/: "#WTF?"
 };
 //var RBErr = evert_num(BErr);
 var RBErr = {
@ -304,20 +304,3 @@ var RBErr = {
 	"#WTF?":         0xFF
 };

-var XLSLblBuiltIn = [
-	"_xlnm.Consolidate_Area",
-	"_xlnm.Auto_Open",
-	"_xlnm.Auto_Close",
-	"_xlnm.Extract",
-	"_xlnm.Database",
-	"_xlnm.Criteria",
-	"_xlnm.Print_Area",
-	"_xlnm.Print_Titles",
-	"_xlnm.Recorder",
-	"_xlnm.Data_Form",
-	"_xlnm.Auto_Activate",
-	"_xlnm.Auto_Deactivate",
-	"_xlnm.Sheet_Title",
-	"_xlnm._FilterDatabase"
-];
-
--- a/bits/30_ctype.js
+++ b/bits/30_ctype.js
@ -177,45 +177,45 @@ var ct2type/*{[string]:string}*/ = ({
 }/*:any*/);

 var CT_LIST = {
-	workbooks: {
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml",
-		xlsm: "application/vnd.ms-excel.sheet.macroEnabled.main+xml",
-		xlsb: "application/vnd.ms-excel.sheet.binary.macroEnabled.main",
-		xlam: "application/vnd.ms-excel.addin.macroEnabled.main+xml",
-		xltx: "application/vnd.openxmlformats-officedocument.spreadsheetml.template.main+xml"
-	},
-	strs: { /* Shared Strings */
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml",
-		xlsb: "application/vnd.ms-excel.sharedStrings"
-	},
-	comments: { /* Comments */
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.comments+xml",
-		xlsb: "application/vnd.ms-excel.comments"
-	},
-	sheets: { /* Worksheet */
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml",
-		xlsb: "application/vnd.ms-excel.worksheet"
-	},
-	charts: { /* Chartsheet */
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.chartsheet+xml",
-		xlsb: "application/vnd.ms-excel.chartsheet"
-	},
-	dialogs: { /* Dialogsheet */
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.dialogsheet+xml",
-		xlsb: "application/vnd.ms-excel.dialogsheet"
-	},
-	macros: { /* Macrosheet (Excel 4.0 Macros) */
-		xlsx: "application/vnd.ms-excel.macrosheet+xml",
-		xlsb: "application/vnd.ms-excel.macrosheet"
-	},
-	metadata: { /* Metadata (Stock/Geography and Dynamic Array) */
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheetMetadata+xml",
-		xlsb: "application/vnd.ms-excel.sheetMetadata"
-	},
-	styles: { /* Styles */
-		xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml",
-		xlsb: "application/vnd.ms-excel.styles"
-	}
+		workbooks: {
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml",
+			xlsm: "application/vnd.ms-excel.sheet.macroEnabled.main+xml",
+			xlsb: "application/vnd.ms-excel.sheet.binary.macroEnabled.main",
+			xlam: "application/vnd.ms-excel.addin.macroEnabled.main+xml",
+			xltx: "application/vnd.openxmlformats-officedocument.spreadsheetml.template.main+xml"
+		},
+		strs: { /* Shared Strings */
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml",
+			xlsb: "application/vnd.ms-excel.sharedStrings"
+		},
+		comments: { /* Comments */
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.comments+xml",
+			xlsb: "application/vnd.ms-excel.comments"
+		},
+		sheets: { /* Worksheet */
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml",
+			xlsb: "application/vnd.ms-excel.worksheet"
+		},
+		charts: { /* Chartsheet */
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.chartsheet+xml",
+			xlsb: "application/vnd.ms-excel.chartsheet"
+		},
+		dialogs: { /* Dialogsheet */
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.dialogsheet+xml",
+			xlsb: "application/vnd.ms-excel.dialogsheet"
+		},
+		macros: { /* Macrosheet (Excel 4.0 Macros) */
+			xlsx: "application/vnd.ms-excel.macrosheet+xml",
+			xlsb: "application/vnd.ms-excel.macrosheet"
+		},
+		metadata: { /* Metadata (Stock/Geography and Dynamic Array) */
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheetMetadata+xml",
+			xlsb: "application/vnd.ms-excel.sheetMetadata"
+		},
+		styles: { /* Styles */
+			xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml",
+			xlsb: "application/vnd.ms-excel.styles"
+		}
 };

 function new_ct()/*:any*/ {
@ -236,7 +236,7 @@ function parse_ct(data/*:?string*/) {
 		switch(y[0].replace(nsregex,"<")) {
 			case '<?xml': break;
 			case '<Types': ct.xmlns = y['xmlns' + (y[0].match(/<(\w+):/)||["",""])[1] ]; break;
-			case '<Default': ctext[y.Extension.toLowerCase()] = y.ContentType; break;
+			case '<Default': ctext[y.Extension] = y.ContentType; break;
 			case '<Override':
 				if(ct[ct2type[y.ContentType]] !== undefined) ct[ct2type[y.ContentType]].push(y.PartName);
 				break;
@ -251,37 +251,35 @@ function parse_ct(data/*:?string*/) {
 	return ct;
 }

-function write_ct(ct, opts, raw)/*:string*/ {
+function write_ct(ct, opts)/*:string*/ {
 	var type2ct/*{[string]:Array<string>}*/ = evert_arr(ct2type);

 	var o/*:Array<string>*/ = [], v;
+	o[o.length] = (XML_HEADER);
+	o[o.length] = writextag('Types', null, {
+		'xmlns': XMLNS.CT,
+		'xmlns:xsd': XMLNS.xsd,
+		'xmlns:xsi': XMLNS.xsi
+	});

-	if(!raw) {
-		o[o.length] = (XML_HEADER);
-		o[o.length] = writextag('Types', null, {
-			'xmlns': XMLNS.CT,
-			'xmlns:xsd': XMLNS.xsd,
-			'xmlns:xsi': XMLNS.xsi
-		});
-		o = o.concat([
-			['xml', 'application/xml'],
-			['bin', 'application/vnd.ms-excel.sheet.binary.macroEnabled.main'],
-			['vml', 'application/vnd.openxmlformats-officedocument.vmlDrawing'],
-			['data', 'application/vnd.openxmlformats-officedocument.model+data'],
-			/* from test files */
-			['bmp', 'image/bmp'],
-			['png', 'image/png'],
-			['gif', 'image/gif'],
-			['emf', 'image/x-emf'],
-			['wmf', 'image/x-wmf'],
-			['jpg', 'image/jpeg'], ['jpeg', 'image/jpeg'],
-			['tif', 'image/tiff'], ['tiff', 'image/tiff'],
-			['pdf', 'application/pdf'],
-			['rels', 'application/vnd.openxmlformats-package.relationships+xml']
-		].map(function(x) {
-			return writextag('Default', null, {'Extension':x[0], 'ContentType': x[1]});
-		}));
-	}
+	o = o.concat([
+		['xml', 'application/xml'],
+		['bin', 'application/vnd.ms-excel.sheet.binary.macroEnabled.main'],
+		['vml', 'application/vnd.openxmlformats-officedocument.vmlDrawing'],
+		['data', 'application/vnd.openxmlformats-officedocument.model+data'],
+		/* from test files */
+		['bmp', 'image/bmp'],
+		['png', 'image/png'],
+		['gif', 'image/gif'],
+		['emf', 'image/x-emf'],
+		['wmf', 'image/x-wmf'],
+		['jpg', 'image/jpeg'], ['jpeg', 'image/jpeg'],
+		['tif', 'image/tiff'], ['tiff', 'image/tiff'],
+		['pdf', 'application/pdf'],
+		['rels', 'application/vnd.openxmlformats-package.relationships+xml']
+	].map(function(x) {
+		return writextag('Default', null, {'Extension':x[0], 'ContentType': x[1]});
+	}));

 	/* only write first instance */
 	var f1 = function(w) {
@ -326,6 +324,6 @@ function write_ct(ct, opts, raw)/*:string*/ {
 	f3('drawings');
 	f2('metadata');
 	f3('people');
-	if(!raw && o.length>2){ o[o.length] = ('</Types>'); o[1]=o[1].replace("/>",">"); }
+	if(o.length>2){ o[o.length] = ('</Types>'); o[1]=o[1].replace("/>",">"); }
 	return o.join("");
 }
--- a/bits/31_rels.js
+++ b/bits/31_rels.js
@ -30,10 +30,10 @@ var RELS = ({
 	XLMETA: "http://schemas.openxmlformats.org/officeDocument/2006/relationships/sheetMetadata",
 	TCMNT: "http://schemas.microsoft.com/office/2017/10/relationships/threadedComment",
 	PEOPLE: "http://schemas.microsoft.com/office/2017/10/relationships/person",
-	CONN: "http://schemas.openxmlformats.org/officeDocument/2006/relationships/connections",
 	VBA: "http://schemas.microsoft.com/office/2006/relationships/vbaProject"
 }/*:any*/);

+
 /* 9.3.3 Representing Relationships */
 function get_rels_path(file/*:string*/)/*:string*/ {
 	var n = file.lastIndexOf("/");
@ -52,7 +52,7 @@ function parse_rels(data/*:?string*/, currentFilePath/*:string*/) {
 		var y = parsexmltag(x);
 		/* 9.3.2.2 OPC_Relationships */
 		if (y[0] === '<Relationship') {
-			var rel = {}; rel.Type = y.Type; rel.Target = unescapexml(y.Target); rel.Id = y.Id; if(y.TargetMode) rel.TargetMode = y.TargetMode;
+			var rel = {}; rel.Type = y.Type; rel.Target = y.Target; rel.Id = y.Id; if(y.TargetMode) rel.TargetMode = y.TargetMode;
 			var canonictarget = y.TargetMode === 'External' ? y.Target : resolve_path(y.Target, currentFilePath);
 			rels[canonictarget] = rel;
 			hash[y.Id] = rel;
--- a/bits/32_odmanrdf.js
+++ b/bits/32_odmanrdf.js
@ -1,61 +1,62 @@
+/* Open Document Format for Office Applications (OpenDocument) Version 1.2 */
+/* Part 3 Section 4 Manifest File */
 var CT_ODS = "application/vnd.oasis.opendocument.spreadsheet";
 function parse_manifest(d, opts) {
-  var str = xlml_normalize(d);
-  var Rn;
-  var FEtag;
-  while (Rn = xlmlregex.exec(str))
-    switch (Rn[3]) {
-      case "manifest":
-        break;
-      case "file-entry":
-        FEtag = parsexmltag(Rn[0], false);
-        if (FEtag.path == "/" && FEtag.type !== CT_ODS)
-          throw new Error("This OpenDocument is not a spreadsheet");
-        break;
-      case "encryption-data":
-      case "algorithm":
-      case "start-key-generation":
-      case "key-derivation":
-        throw new Error("Unsupported ODS Encryption");
-      default:
-        if (opts && opts.WTF)
-          throw Rn;
-    }
+	var str = xlml_normalize(d);
+	var Rn;
+	var FEtag;
+	while((Rn = xlmlregex.exec(str))) switch(Rn[3]) {
+		case 'manifest': break; // 4.2 <manifest:manifest>
+		case 'file-entry': // 4.3 <manifest:file-entry>
+			FEtag = parsexmltag(Rn[0], false);
+			if(FEtag.path == '/' && FEtag.type !== CT_ODS) throw new Error("This OpenDocument is not a spreadsheet");
+			break;
+		case 'encryption-data': // 4.4 <manifest:encryption-data>
+		case 'algorithm': // 4.5 <manifest:algorithm>
+		case 'start-key-generation': // 4.6 <manifest:start-key-generation>
+		case 'key-derivation': // 4.7 <manifest:key-derivation>
+			throw new Error("Unsupported ODS Encryption");
+		default: if(opts && opts.WTF) throw Rn;
+	}
 }
-function write_manifest(manifest) {
-  var o = [XML_HEADER];
-  o.push('<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.2">\n');
-  o.push('  <manifest:file-entry manifest:full-path="/" manifest:version="1.2" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/>\n');
-  for (var i = 0; i < manifest.length; ++i)
-    o.push('  <manifest:file-entry manifest:full-path="' + manifest[i][0] + '" manifest:media-type="' + manifest[i][1] + '"/>\n');
-  o.push("</manifest:manifest>");
-  return o.join("");
+
+function write_manifest(manifest/*:Array<Array<string> >*/)/*:string*/ {
+	var o = [XML_HEADER];
+	o.push('<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.2">\n');
+	o.push('  <manifest:file-entry manifest:full-path="/" manifest:version="1.2" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/>\n');
+	for(var i = 0; i < manifest.length; ++i) o.push('  <manifest:file-entry manifest:full-path="' + manifest[i][0] + '" manifest:media-type="' + manifest[i][1] + '"/>\n');
+	o.push('</manifest:manifest>');
+	return o.join("");
 }
-function write_rdf_type(file, res, tag) {
-  return [
-    '  <rdf:Description rdf:about="' + file + '">\n',
-    '    <rdf:type rdf:resource="http://docs.oasis-open.org/ns/office/1.2/meta/' + (tag || "odf") + "#" + res + '"/>\n',
-    "  </rdf:Description>\n"
-  ].join("");
+
+/* Part 3 Section 6 Metadata Manifest File */
+function write_rdf_type(file/*:string*/, res/*:string*/, tag/*:?string*/) {
+	return [
+		'  <rdf:Description rdf:about="' + file + '">\n',
+		'    <rdf:type rdf:resource="http://docs.oasis-open.org/ns/office/1.2/meta/' + (tag || "odf") + '#' + res + '"/>\n',
+		'  </rdf:Description>\n'
+	].join("");
 }
-function write_rdf_has(base, file) {
-  return [
-    '  <rdf:Description rdf:about="' + base + '">\n',
-    '    <ns0:hasPart xmlns:ns0="http://docs.oasis-open.org/ns/office/1.2/meta/pkg#" rdf:resource="' + file + '"/>\n',
-    "  </rdf:Description>\n"
-  ].join("");
+function write_rdf_has(base/*:string*/, file/*:string*/) {
+	return [
+		'  <rdf:Description rdf:about="' + base + '">\n',
+		'    <ns0:hasPart xmlns:ns0="http://docs.oasis-open.org/ns/office/1.2/meta/pkg#" rdf:resource="' + file + '"/>\n',
+		'  </rdf:Description>\n'
+	].join("");
 }
 function write_rdf(rdf) {
-  var o = [XML_HEADER];
-  o.push('<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">\n');
-  for (var i = 0; i != rdf.length; ++i) {
-    o.push(write_rdf_type(rdf[i][0], rdf[i][1]));
-    o.push(write_rdf_has("", rdf[i][0]));
-  }
-  o.push(write_rdf_type("", "Document", "pkg"));
-  o.push("</rdf:RDF>");
-  return o.join("");
+	var o = [XML_HEADER];
+	o.push('<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">\n');
+	for(var i = 0; i != rdf.length; ++i) {
+		o.push(write_rdf_type(rdf[i][0], rdf[i][1]));
+		o.push(write_rdf_has("",rdf[i][0]));
+	}
+	o.push(write_rdf_type("","Document", "pkg"));
+	o.push('</rdf:RDF>');
+	return o.join("");
 }
-function write_meta_ods(wb, opts) {
-  return '<office:document-meta xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" office:version="1.2"><office:meta><meta:generator>SheetJS ' + XLSX.version + "</meta:generator></office:meta></office:document-meta>";
+/* TODO: pull properties */
+function write_meta_ods(/*:: wb: Workbook, opts: any*/)/*:string*/ {
+	return '<office:document-meta xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" office:version="1.2"><office:meta><meta:generator>Sheet' + 'JS ' + XLSX.version + '</meta:generator></office:meta></office:document-meta>';
 }
+
--- a/bits/33_coreprops.js
+++ b/bits/33_coreprops.js
@ -18,12 +18,22 @@ var CORE_PROPS/*:Array<Array<string> >*/ = [
 	["dcterms:modified", "ModifiedDate", 'date']
 ];

+var CORE_PROPS_REGEX/*:Array<RegExp>*/ = /*#__PURE__*/(function() {
+	var r = new Array(CORE_PROPS.length);
+	for(var i = 0; i < CORE_PROPS.length; ++i) {
+		var f = CORE_PROPS[i];
+		var g = "(?:"+ f[0].slice(0,f[0].indexOf(":")) +":)"+ f[0].slice(f[0].indexOf(":")+1);
+		r[i] = new RegExp("<" + g + "[^>]*>([\\s\\S]*?)<\/" + g + ">");
+	}
+	return r;
+})();
+
 function parse_core_props(data) {
 	var p = {};
 	data = utf8read(data);

 	for(var i = 0; i < CORE_PROPS.length; ++i) {
-		var f = CORE_PROPS[i], cur = str_match_xml(data, f[0]);
+		var f = CORE_PROPS[i], cur = data.match(CORE_PROPS_REGEX[i]);
 		if(cur != null && cur.length > 0) p[f[1]] = unescapexml(cur[1]);
 		if(f[2] === 'date' && p[f[1]]) p[f[1]] = parseDate(p[f[1]]);
 	}
--- a/bits/34_extprops.js
+++ b/bits/34_extprops.js
@ -71,12 +71,12 @@ function parse_ext_props(data, p, opts) {
 	data = utf8read(data);

 	EXT_PROPS.forEach(function(f) {
-		var xml = (str_match_xml_ns(data, f[0])||[])[1];
+		var xml = (data.match(matchtag(f[0]))||[])[1];
 		switch(f[2]) {
 			case "string": if(xml) p[f[1]] = unescapexml(xml); break;
 			case "bool": p[f[1]] = xml === "true"; break;
 			case "raw":
-				var cur = str_match_xml(data, f[0]);
+				var cur = data.match(new RegExp("<" + f[0] + "[^>]*>([\\s\\S]*?)<\/" + f[0] + ">"));
 				if(cur && cur.length > 0) q[f[1]] = cur[1];
 				break;
 		}
--- a/bits/35_custprops.js
+++ b/bits/35_custprops.js
@ -1,11 +1,11 @@
 /* 15.2.12.2 Custom File Properties Part */
-var custregex = /<[^<>]+>[^<]*/g;
+var custregex = /<[^>]+>[^<]*/g;
 function parse_cust_props(data/*:string*/, opts) {
 	var p = {}, name = "";
 	var m = data.match(custregex);
 	if(m) for(var i = 0; i != m.length; ++i) {
 		var x = m[i], y = parsexmltag(x);
-		switch(strip_ns(y[0])) {
+		switch(y[0]) {
 			case '<?xml': break;
 			case '<Properties': break;
 			case '<property': name = unescapexml(y.name); break;
--- a/bits/38_xlstypes.js
+++ b/bits/38_xlstypes.js
@ -185,7 +185,6 @@ function parse_PropertySet(blob, PIDSI) {
 			if(fail) throw new Error("Read Error: Expected address " + Props[i][1] + ' at ' + blob.l + ' :' + i);
 		}
 		if(PIDSI) {
-			if(Props[i][0] == 0 && Props.length > i+1 && Props[i][1] == Props[i+1][1]) continue; // R9
 			var piddsi = PIDSI[Props[i][0]];
 			PropH[piddsi.n] = parse_TypedPropertyValue(blob, piddsi.t, {raw:true});
 			if(piddsi.p === 'version') PropH[piddsi.n] = String(PropH[piddsi.n] >> 16) + "." + ("0000" + String(PropH[piddsi.n] & 0xFFFF)).slice(-4);
@ -233,8 +232,8 @@ function parse_PropertySet(blob, PIDSI) {
 				/* [MS-OSHARED] 2.3.3.2.3.1.2 + PROPVARIANT */
 				switch(blob[blob.l]) {
 					case 0x41 /*VT_BLOB*/: blob.l += 4; val = parse_BLOB(blob); break;
-					case 0x1E /*VT_LPSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/(^|[^\u0000])\u0000+$/,"$1"); break;
-					case 0x1F /*VT_LPWSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/(^|[^\u0000])\u0000+$/,"$1"); break;
+					case 0x1E /*VT_LPSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/\u0000+$/,""); break;
+					case 0x1F /*VT_LPWSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/\u0000+$/,""); break;
 					case 0x03 /*VT_I4*/: blob.l += 4; val = blob.read_shift(4, 'i'); break;
 					case 0x13 /*VT_UI4*/: blob.l += 4; val = blob.read_shift(4); break;
 					case 0x05 /*VT_R8*/: blob.l += 4; val = blob.read_shift(8, 'f'); break;
@ -249,7 +248,7 @@ function parse_PropertySet(blob, PIDSI) {
 	blob.l = start_addr + size; /* step ahead to skip padding */
 	return PropH;
 }
-var XLSPSSkip = [ "CodePage", "Thumbnail", "_PID_LINKBASE", "_PID_HLINKS", "SystemIdentifier", "FMTID" ];
+var XLSPSSkip = [ "CodePage", "Thumbnail", "_PID_LINKBASE", "_PID_HLINKS", "SystemIdentifier", "FMTID" ]; //.concat(PseudoPropsPairs);
 function guess_property_type(val/*:any*/)/*:number*/ {
 	switch(typeof val) {
 		case "boolean": return 0x0B;
--- a/bits/39_xlsbiff.js
+++ b/bits/39_xlsbiff.js
@ -1,20 +1,9 @@
 /* [MS-XLS] 2.5.19 */
-function parse_XLSCell(blob, length, opts)/*:Cell*/ {
+function parse_XLSCell(blob/*::, length*/)/*:Cell*/ {
 	var rw = blob.read_shift(2); // 0-indexed
 	var col = blob.read_shift(2);
-	var ret = ({r:rw, c:col, ixfe:0}/*:any*/);
-	if(opts && opts.biff == 2 || length == 7) {
-		/* TODO: pass back flags */
-		var flags = blob.read_shift(1);
-		ret.ixfe = flags & 0x3F;
-		blob.l += 2;
-		/*
-		var ifntifmt = blob.read_shift(1);
-		var ifmt = ifntifmt & 0x3f, ifnt = ifntifmt >> 6;
-		var flags3 = blob.read_shift(1);
-		*/
-	} else ret.ixfe = blob.read_shift(2);
-	return ret;
+	var ixfe = blob.read_shift(2);
+	return ({r:rw, c:col, ixfe:ixfe}/*:any*/);
 }
 function write_XLSCell(R/*:number*/, C/*:number*/, ixfe/*:?number*/, o) {
 	if(!o) o = new_buf(6);
@ -122,25 +111,25 @@ function parse_FtCf(blob) {
 /* [MS-XLS] 2.5.140 - 2.5.154 and friends */
 function parse_FtSkip(blob) { blob.l += 2; blob.l += blob.read_shift(2); }
 var FtTab = {
-	0x00: parse_FtSkip,      /* FtEnd */
-	0x04: parse_FtSkip,      /* FtMacro */
-	0x05: parse_FtSkip,      /* FtButton */
-	0x06: parse_FtSkip,      /* FtGmo */
-	0x07: parse_FtCf,        /* FtCf */
-	0x08: parse_FtSkip,      /* FtPioGrbit */
-	0x09: parse_FtSkip,      /* FtPictFmla */
-	0x0A: parse_FtSkip,      /* FtCbls */
-	0x0B: parse_FtSkip,      /* FtRbo */
-	0x0C: parse_FtSkip,      /* FtSbs */
-	0x0D: parse_FtNts,       /* FtNts */
-	0x0E: parse_FtSkip,      /* FtSbsFmla */
-	0x0F: parse_FtSkip,      /* FtGboData */
-	0x10: parse_FtSkip,      /* FtEdoData */
-	0x11: parse_FtSkip,      /* FtRboData */
-	0x12: parse_FtSkip,      /* FtCblsData */
-	0x13: parse_FtSkip,      /* FtLbsData */
-	0x14: parse_FtSkip,      /* FtCblsFmla */
-	0x15: parse_FtCmo
+	/*::[*/0x00/*::]*/: parse_FtSkip,      /* FtEnd */
+	/*::[*/0x04/*::]*/: parse_FtSkip,      /* FtMacro */
+	/*::[*/0x05/*::]*/: parse_FtSkip,      /* FtButton */
+	/*::[*/0x06/*::]*/: parse_FtSkip,      /* FtGmo */
+	/*::[*/0x07/*::]*/: parse_FtCf,        /* FtCf */
+	/*::[*/0x08/*::]*/: parse_FtSkip,      /* FtPioGrbit */
+	/*::[*/0x09/*::]*/: parse_FtSkip,      /* FtPictFmla */
+	/*::[*/0x0A/*::]*/: parse_FtSkip,      /* FtCbls */
+	/*::[*/0x0B/*::]*/: parse_FtSkip,      /* FtRbo */
+	/*::[*/0x0C/*::]*/: parse_FtSkip,      /* FtSbs */
+	/*::[*/0x0D/*::]*/: parse_FtNts,       /* FtNts */
+	/*::[*/0x0E/*::]*/: parse_FtSkip,      /* FtSbsFmla */
+	/*::[*/0x0F/*::]*/: parse_FtSkip,      /* FtGboData */
+	/*::[*/0x10/*::]*/: parse_FtSkip,      /* FtEdoData */
+	/*::[*/0x11/*::]*/: parse_FtSkip,      /* FtRboData */
+	/*::[*/0x12/*::]*/: parse_FtSkip,      /* FtCblsData */
+	/*::[*/0x13/*::]*/: parse_FtSkip,      /* FtLbsData */
+	/*::[*/0x14/*::]*/: parse_FtSkip,      /* FtCblsFmla */
+	/*::[*/0x15/*::]*/: parse_FtCmo
 };
 function parse_FtArray(blob, length/*::, ot*/) {
 	var tgt = blob.l + length;
@ -149,7 +138,7 @@ function parse_FtArray(blob, length/*::, ot*/) {
 		var ft = blob.read_shift(2);
 		blob.l-=2;
 		try {
-			fts[ft] = FtTab[ft](blob, tgt - blob.l);
+			fts.push(FtTab[ft](blob, tgt - blob.l));
 		} catch(e) { blob.l = tgt; return fts; }
 	}
 	if(blob.l != tgt) blob.l = tgt; //throw new Error("bad Object Ft-sequence");
@ -239,12 +228,6 @@ function parse_WsBool(blob, length, opts) {

 /* [MS-XLS] 2.4.28 */
 function parse_BoundSheet8(blob, length, opts) {
-	var name = "";
-	if(opts.biff == 4) {
-		name = parse_ShortXLUnicodeString(blob, 0, opts);
-		if(name.length === 0) name = "Sheet1";
-		return { name:name };
-	}
 	var pos = blob.read_shift(4);
 	var hidden = blob.read_shift(1) & 0x03;
 	var dt = blob.read_shift(1);
@ -254,7 +237,7 @@ function parse_BoundSheet8(blob, length, opts) {
 		case 2: dt = 'Chartsheet'; break;
 		case 6: dt = 'VBAModule'; break;
 	}
-	name = parse_ShortXLUnicodeString(blob, 0, opts);
+	var name = parse_ShortXLUnicodeString(blob, 0, opts);
 	if(name.length === 0) name = "Sheet1";
 	return { pos:pos, hs:hidden, dt:dt, name:name };
 }
@ -425,8 +408,8 @@ function write_Font(data, opts) {
 }

 /* [MS-XLS] 2.4.149 */
-function parse_LabelSst(blob, length, opts) {
-	var cell = parse_XLSCell(blob, length, opts);
+function parse_LabelSst(blob) {
+	var cell = parse_XLSCell(blob);
 	cell.isst = blob.read_shift(4);
 	return cell;
 }
@ -441,7 +424,8 @@ function write_LabelSst(R/*:number*/, C/*:number*/, v/*:number*/, os/*:number*/
 function parse_Label(blob, length, opts) {
 	if(opts.biffguess && opts.biff == 2) opts.biff = 5;
 	var target = blob.l + length;
-	var cell = parse_XLSCell(blob, length, opts);
+	var cell = parse_XLSCell(blob, 6);
+	if(opts.biff == 2) blob.l++;
 	var str = parse_XLUnicodeString(blob, target - blob.l, opts);
 	cell.val = str;
 	return cell;
@ -475,19 +459,6 @@ function write_Format(i/*:number*/, f/*:string*/, opts, o) {
 	return out;
 }
 var parse_BIFF2Format = parse_XLUnicodeString2;
-function write_BIFF2Format(f/*:string*/) {
-	var o = new_buf(1 + f.length);
-	o.write_shift(1, f.length);
-	o.write_shift(f.length, f, "sbcs");
-	return o;
-}
-function write_BIFF4Format(f/*:string*/) {
-	var o = new_buf(3 + f.length);
-	o.l += 2;
-	o.write_shift(1, f.length);
-	o.write_shift(f.length, f, "sbcs");
-	return o;
-}

 /* [MS-XLS] 2.4.90 */
 function parse_Dimensions(blob, length, opts) {
@ -611,44 +582,6 @@ function write_XF(data, ixfeP, opts, o) {
 	o.write_shift(2, 0);
 	return o;
 }
-function parse_BIFF2XF(blob/*::, length, opts*/) {
-	var o = {};
-	o.ifnt = blob.read_shift(1); blob.l++; o.flags = blob.read_shift(1);
-	o.numFmtId = o.flags & 0x3F; o.flags>>=6;
-	o.fStyle = 0;
-	o.data = {}; // TODO
-	return o;
-}
-function write_BIFF2XF(xf) {
-	var o = new_buf(4);
-	o.l+=2;
-	o.write_shift(1, xf.numFmtId);
-	o.l++;
-	return o;
-}
-function write_BIFF3XF(xf) {
-	var o = new_buf(12);
-	o.l++;
-	o.write_shift(1, xf.numFmtId);
-	o.l += 10;
-	return o;
-}
-/* TODO: check other fields */
-var write_BIFF4XF = write_BIFF3XF;
-function parse_BIFF3XF(blob/*::, length, opts*/) {
-	var o = {};
-	o.ifnt = blob.read_shift(1); o.numFmtId = blob.read_shift(1); o.flags = blob.read_shift(2);
-	o.fStyle = (o.flags >> 2) & 0x01;
-	o.data = {}; // TODO
-	return o;
-}
-function parse_BIFF4XF(blob/*::, length, opts*/) {
-	var o = {};
-	o.ifnt = blob.read_shift(1); o.numFmtId = blob.read_shift(1); o.flags = blob.read_shift(2);
-	o.fStyle = (o.flags >> 2) & 0x01;
-	o.data = {}; // TODO
-	return o;
-}

 /* [MS-XLS] 2.4.134 */
 function parse_Guts(blob) {
@ -669,7 +602,8 @@ function write_Guts(guts/*:Array<number>*/) {

 /* [MS-XLS] 2.4.24 */
 function parse_BoolErr(blob, length, opts) {
-	var cell = parse_XLSCell(blob, 6, opts);
+	var cell = parse_XLSCell(blob, 6);
+	if(opts.biff == 2 || length == 9) ++blob.l;
 	var val = parse_Bes(blob, 2);
 	cell.val = val;
 	cell.t = (val === true || val === false) ? 'b' : 'e';
@ -685,7 +619,7 @@ function write_BoolErr(R/*:number*/, C/*:number*/, v, os/*:number*/, opts, t/*:s
 /* [MS-XLS] 2.4.180 Number */
 function parse_Number(blob, length, opts) {
 	if(opts.biffguess && opts.biff == 2) opts.biff = 5;
-	var cell = parse_XLSCell(blob, 6, opts);
+	var cell = parse_XLSCell(blob, 6);
 	var xnum = parse_Xnum(blob, 8);
 	cell.val = xnum;
 	return cell;
@ -735,6 +669,22 @@ function parse_ExternName(blob, length, opts) {
 }

 /* [MS-XLS] 2.4.150 TODO */
+var XLSLblBuiltIn = [
+	"_xlnm.Consolidate_Area",
+	"_xlnm.Auto_Open",
+	"_xlnm.Auto_Close",
+	"_xlnm.Extract",
+	"_xlnm.Database",
+	"_xlnm.Criteria",
+	"_xlnm.Print_Area",
+	"_xlnm.Print_Titles",
+	"_xlnm.Recorder",
+	"_xlnm.Data_Form",
+	"_xlnm.Auto_Activate",
+	"_xlnm.Auto_Deactivate",
+	"_xlnm.Sheet_Title",
+	"_xlnm._FilterDatabase"
+];
 function parse_Lbl(blob, length, opts) {
 	var target = blob.l + length;
 	var flags = blob.read_shift(2);
@ -762,11 +712,9 @@ function parse_Lbl(blob, length, opts) {
 	};
 }

-/* [MS-XLS] 2.4.106 TODO: legacy record filename encoding */
+/* [MS-XLS] 2.4.106 TODO: verify filename encoding */
 function parse_ExternSheet(blob, length, opts) {
 	if(opts.biff < 8) return parse_BIFF5ExternSheet(blob, length, opts);
-	/* see issue 2907 */
-	if(!(opts.biff > 8) && (length == blob[blob.l] + (blob[blob.l+1] == 0x03 ? 1 : 0) + 1)) return parse_BIFF5ExternSheet(blob, length, opts);
 	var o = [], target = blob.l + length, len = blob.read_shift(opts.biff > 8 ? 4 : 2);
 	while(len-- !== 0) o.push(parse_XTI(blob, opts.biff > 8 ? 12 : 6, opts));
 		// [iSupBook, itabFirst, itabLast];
@ -818,34 +766,21 @@ function parse_MTRSettings(blob) {
 	return [fMTREnabled, fUserSetThreadCount, cUserThreadCount];
 }

-/* [MS-XLS] 2.5.186 */
+/* [MS-XLS] 2.5.186 TODO: BIFF5 */
 function parse_NoteSh(blob, length, opts) {
+	if(opts.biff < 8) return;
 	var row = blob.read_shift(2), col = blob.read_shift(2);
 	var flags = blob.read_shift(2), idObj = blob.read_shift(2);
 	var stAuthor = parse_XLUnicodeString2(blob, 0, opts);
+	if(opts.biff < 8) blob.read_shift(1);
 	return [{r:row,c:col}, stAuthor, idObj, flags];
 }

 /* [MS-XLS] 2.4.179 */
 function parse_Note(blob, length, opts) {
-	if(opts && (opts.biff < 8)) {
-		var row = blob.read_shift(2), col = blob.read_shift(2);
-		if(row == 0xFFFF || row == -1) return; // TODO: test continuation
-		var cch = blob.read_shift(2);
-		var cmnt = blob.read_shift(Math.min(cch,2048), 'cpstr');
-		return [{r:row, c:col}, cmnt];
-	}
 	/* TODO: Support revisions */
 	return parse_NoteSh(blob, length, opts);
 }
-function write_NOTE_BIFF2(text/*:string*/, R/*:number*/, C/*:number*/, len/*?:number*/) {
-	var o = new_buf(6 + (len || text.length));
-	o.write_shift(2, R);
-	o.write_shift(2, C);
-	o.write_shift(2, len || text.length);
-	o.write_shift(text.length, text, "sbcs");
-	return o;
-}

 /* [MS-XLS] 2.4.168 */
 function parse_MergeCells(blob, length)/*:Array<Range>*/ {
@ -1095,50 +1030,43 @@ function parse_ImData(blob) {
 	return o;
 }

-function write_BIFF2Cell(out, r/*:number*/, c/*:number*/, ixfe/*:number*/, ifmt/*:number*/) {
-	if(!out) out = new_buf(7);
-	out.write_shift(2, r);
-	out.write_shift(2, c);
-	out.write_shift(1, ixfe||0/* & 0x3F */);
-	out.write_shift(1, ifmt||0/* & 0x3F */);
-	out.write_shift(1, 0);
-	return out;
-}
-
 /* BIFF2_??? where ??? is the name from [XLS] */
 function parse_BIFF2STR(blob, length, opts) {
 	if(opts.biffguess && opts.biff == 5) opts.biff = 2;
-	var cell = parse_XLSCell(blob, 7, opts);
+	var cell = parse_XLSCell(blob, 6);
+	++blob.l;
 	var str = parse_XLUnicodeString2(blob, length-7, opts);
 	cell.t = 'str';
 	cell.val = str;
 	return cell;
 }

-function parse_BIFF2NUM(blob, length, opts) {
-	var cell = parse_XLSCell(blob, 7, opts);
+function parse_BIFF2NUM(blob/*::, length*/) {
+	var cell = parse_XLSCell(blob, 6);
+	++blob.l;
 	var num = parse_Xnum(blob, 8);
 	cell.t = 'n';
 	cell.val = num;
 	return cell;
 }
-function write_BIFF2NUM(r/*:number*/, c/*:number*/, val/*:number*/, ixfe, ifmt) {
+function write_BIFF2NUM(r/*:number*/, c/*:number*/, val/*:number*/) {
 	var out = new_buf(15);
-	write_BIFF2Cell(out, r, c, ixfe||0, ifmt||0);
+	write_BIFF2Cell(out, r, c);
 	out.write_shift(8, val, 'f');
 	return out;
 }

-function parse_BIFF2INT(blob, length, opts) {
-	var cell = parse_XLSCell(blob, 7, opts);
+function parse_BIFF2INT(blob) {
+	var cell = parse_XLSCell(blob, 6);
+	++blob.l;
 	var num = blob.read_shift(2);
 	cell.t = 'n';
 	cell.val = num;
 	return cell;
 }
-function write_BIFF2INT(r/*:number*/, c/*:number*/, val/*:number*/, ixfe/*:number*/, ifmt/*:number*/) {
+function write_BIFF2INT(r/*:number*/, c/*:number*/, val/*:number*/) {
 	var out = new_buf(9);
-	write_BIFF2Cell(out, r, c, ixfe||0, ifmt||0);
+	write_BIFF2Cell(out, r, c);
 	out.write_shift(2, val);
 	return out;
 }
@ -1149,16 +1077,6 @@ function parse_BIFF2STRING(blob) {
 	return blob.read_shift(cch, 'sbcs-cont');
 }

-function parse_BIFF2BOOLERR(blob, length, opts) {
-	var bestart = blob.l + 7;
-	var cell = parse_XLSCell(blob, 6, opts);
-	blob.l = bestart;
-	var val = parse_Bes(blob, 2);
-	cell.val = val;
-	cell.t = (val === true || val === false) ? 'b' : 'e';
-	return cell;
-}
-
 /* TODO: convert to BIFF8 font struct */
 function parse_BIFF2FONTXTRA(blob, length) {
 	blob.l += 6; // unknown
@ -1172,7 +1090,7 @@ function parse_BIFF2FONTXTRA(blob, length) {
 /* TODO: parse rich text runs */
 function parse_RString(blob, length, opts) {
 	var end = blob.l + length;
-	var cell = parse_XLSCell(blob, 6, opts);
+	var cell = parse_XLSCell(blob, 6);
 	var cch = blob.read_shift(2);
 	var str = parse_XLUnicodeStringNoCch(blob, cch, opts);
 	blob.l = end;
@ -1180,10 +1098,3 @@ function parse_RString(blob, length, opts) {
 	cell.val = str;
 	return cell;
 }
-
-function parse_BIFF4SheetInfo(blob/*::, length, opts*/) {
-	var flags = blob.read_shift(4);
-	var cch = blob.read_shift(1), name = blob.read_shift(cch, "sbcs");
-	if(name.length === 0) name = "Sheet1";
-	return { flags: flags, name:name };
-}
--- a/bits/40_harb.js
+++ b/bits/40_harb.js
@ -1,61 +1,62 @@
+/* from js-harb (C) 2014-present  SheetJS */
 var DBF_SUPPORTED_VERSIONS = [0x02, 0x03, 0x30, 0x31, 0x83, 0x8B, 0x8C, 0xF5];
 var DBF = /*#__PURE__*/(function() {
 var dbf_codepage_map = {
 	/* Code Pages Supported by Visual FoxPro */
-	0x01:   437,           0x02:   850,
-	0x03:  1252,           0x04: 10000,
-	0x64:   852,           0x65:   866,
-	0x66:   865,           0x67:   861,
-	0x68:   895,           0x69:   620,
-	0x6A:   737,           0x6B:   857,
-	0x78:   950,           0x79:   949,
-	0x7A:   936,           0x7B:   932,
-	0x7C:   874,           0x7D:  1255,
-	0x7E:  1256,           0x96: 10007,
-	0x97: 10029,           0x98: 10006,
-	0xC8:  1250,           0xC9:  1251,
-	0xCA:  1254,           0xCB:  1253,
+	/*::[*/0x01/*::]*/:   437,           /*::[*/0x02/*::]*/:   850,
+	/*::[*/0x03/*::]*/:  1252,           /*::[*/0x04/*::]*/: 10000,
+	/*::[*/0x64/*::]*/:   852,           /*::[*/0x65/*::]*/:   866,
+	/*::[*/0x66/*::]*/:   865,           /*::[*/0x67/*::]*/:   861,
+	/*::[*/0x68/*::]*/:   895,           /*::[*/0x69/*::]*/:   620,
+	/*::[*/0x6A/*::]*/:   737,           /*::[*/0x6B/*::]*/:   857,
+	/*::[*/0x78/*::]*/:   950,           /*::[*/0x79/*::]*/:   949,
+	/*::[*/0x7A/*::]*/:   936,           /*::[*/0x7B/*::]*/:   932,
+	/*::[*/0x7C/*::]*/:   874,           /*::[*/0x7D/*::]*/:  1255,
+	/*::[*/0x7E/*::]*/:  1256,           /*::[*/0x96/*::]*/: 10007,
+	/*::[*/0x97/*::]*/: 10029,           /*::[*/0x98/*::]*/: 10006,
+	/*::[*/0xC8/*::]*/:  1250,           /*::[*/0xC9/*::]*/:  1251,
+	/*::[*/0xCA/*::]*/:  1254,           /*::[*/0xCB/*::]*/:  1253,

 	/* shapefile DBF extension */
-	0x00: 20127,           0x08:   865,
-	0x09:   437,           0x0A:   850,
-	0x0B:   437,           0x0D:   437,
-	0x0E:   850,           0x0F:   437,
-	0x10:   850,           0x11:   437,
-	0x12:   850,           0x13:   932,
-	0x14:   850,           0x15:   437,
-	0x16:   850,           0x17:   865,
-	0x18:   437,           0x19:   437,
-	0x1A:   850,           0x1B:   437,
-	0x1C:   863,           0x1D:   850,
-	0x1F:   852,           0x22:   852,
-	0x23:   852,           0x24:   860,
-	0x25:   850,           0x26:   866,
-	0x37:   850,           0x40:   852,
-	0x4D:   936,           0x4E:   949,
-	0x4F:   950,           0x50:   874,
-	0x57:  1252,           0x58:  1252,
-	0x59:  1252,           0x6C:   863,
-	0x86:   737,           0x87:   852,
-	0x88:   857,           0xCC:  1257,
+	/*::[*/0x00/*::]*/: 20127,           /*::[*/0x08/*::]*/:   865,
+	/*::[*/0x09/*::]*/:   437,           /*::[*/0x0A/*::]*/:   850,
+	/*::[*/0x0B/*::]*/:   437,           /*::[*/0x0D/*::]*/:   437,
+	/*::[*/0x0E/*::]*/:   850,           /*::[*/0x0F/*::]*/:   437,
+	/*::[*/0x10/*::]*/:   850,           /*::[*/0x11/*::]*/:   437,
+	/*::[*/0x12/*::]*/:   850,           /*::[*/0x13/*::]*/:   932,
+	/*::[*/0x14/*::]*/:   850,           /*::[*/0x15/*::]*/:   437,
+	/*::[*/0x16/*::]*/:   850,           /*::[*/0x17/*::]*/:   865,
+	/*::[*/0x18/*::]*/:   437,           /*::[*/0x19/*::]*/:   437,
+	/*::[*/0x1A/*::]*/:   850,           /*::[*/0x1B/*::]*/:   437,
+	/*::[*/0x1C/*::]*/:   863,           /*::[*/0x1D/*::]*/:   850,
+	/*::[*/0x1F/*::]*/:   852,           /*::[*/0x22/*::]*/:   852,
+	/*::[*/0x23/*::]*/:   852,           /*::[*/0x24/*::]*/:   860,
+	/*::[*/0x25/*::]*/:   850,           /*::[*/0x26/*::]*/:   866,
+	/*::[*/0x37/*::]*/:   850,           /*::[*/0x40/*::]*/:   852,
+	/*::[*/0x4D/*::]*/:   936,           /*::[*/0x4E/*::]*/:   949,
+	/*::[*/0x4F/*::]*/:   950,           /*::[*/0x50/*::]*/:   874,
+	/*::[*/0x57/*::]*/:  1252,           /*::[*/0x58/*::]*/:  1252,
+	/*::[*/0x59/*::]*/:  1252,           /*::[*/0x6C/*::]*/:   863,
+	/*::[*/0x86/*::]*/:   737,           /*::[*/0x87/*::]*/:   852,
+	/*::[*/0x88/*::]*/:   857,           /*::[*/0xCC/*::]*/:  1257,

-	0xFF: 16969
+	/*::[*/0xFF/*::]*/: 16969
 };
 var dbf_reverse_map = evert({
-	0x01:   437,           0x02:   850,
-	0x03:  1252,           0x04: 10000,
-	0x64:   852,           0x65:   866,
-	0x66:   865,           0x67:   861,
-	0x68:   895,           0x69:   620,
-	0x6A:   737,           0x6B:   857,
-	0x78:   950,           0x79:   949,
-	0x7A:   936,           0x7B:   932,
-	0x7C:   874,           0x7D:  1255,
-	0x7E:  1256,           0x96: 10007,
-	0x97: 10029,           0x98: 10006,
-	0xC8:  1250,           0xC9:  1251,
-	0xCA:  1254,           0xCB:  1253,
-	0x00: 20127
+	/*::[*/0x01/*::]*/:   437,           /*::[*/0x02/*::]*/:   850,
+	/*::[*/0x03/*::]*/:  1252,           /*::[*/0x04/*::]*/: 10000,
+	/*::[*/0x64/*::]*/:   852,           /*::[*/0x65/*::]*/:   866,
+	/*::[*/0x66/*::]*/:   865,           /*::[*/0x67/*::]*/:   861,
+	/*::[*/0x68/*::]*/:   895,           /*::[*/0x69/*::]*/:   620,
+	/*::[*/0x6A/*::]*/:   737,           /*::[*/0x6B/*::]*/:   857,
+	/*::[*/0x78/*::]*/:   950,           /*::[*/0x79/*::]*/:   949,
+	/*::[*/0x7A/*::]*/:   936,           /*::[*/0x7B/*::]*/:   932,
+	/*::[*/0x7C/*::]*/:   874,           /*::[*/0x7D/*::]*/:  1255,
+	/*::[*/0x7E/*::]*/:  1256,           /*::[*/0x96/*::]*/: 10007,
+	/*::[*/0x97/*::]*/: 10029,           /*::[*/0x98/*::]*/: 10006,
+	/*::[*/0xC8/*::]*/:  1250,           /*::[*/0xC9/*::]*/:  1251,
+	/*::[*/0xCA/*::]*/:  1254,           /*::[*/0xCB/*::]*/:  1253,
+	/*::[*/0x00/*::]*/: 20127
 });
 /* TODO: find an actual specification */
 function dbf_to_aoa(buf, opts)/*:AOA*/ {
@ -118,7 +119,7 @@ function dbf_to_aoa(buf, opts)/*:AOA*/ {
 	var ww = l7 ? 32 : 11;
 	while(d.l < hend && d[d.l] != 0x0d) {
 		field = ({}/*:any*/);
-		field.name = (typeof $cptable !== "undefined" ? $cptable.utils.decode(current_cp, d.slice(d.l, d.l+ww)) : a2s(d.slice(d.l, d.l + ww))).replace(/[\u0000\r\n][\S\s]*$/g,"");
+		field.name = $cptable.utils.decode(current_cp, d.slice(d.l, d.l+ww)).replace(/[\u0000\r\n].*$/g,"");
 		d.l += ww;
 		field.type = String.fromCharCode(d.read_shift(1));
 		if(ft != 0x02 && !l7) field.offset = d.read_shift(4);
@ -172,17 +173,14 @@ function dbf_to_aoa(buf, opts)/*:AOA*/ {
 		for(C = 0; C != fields.length; ++C) {
 			var dd = d.slice(d.l, d.l+fields[C].len); d.l+=fields[C].len;
 			prep_blob(dd, 0);
-			var s = typeof $cptable !== "undefined" ? $cptable.utils.decode(current_cp, dd) : a2s(dd);
+			var s = $cptable.utils.decode(current_cp, dd);
 			switch(fields[C].type) {
 				case 'C':
 					// NOTE: it is conventional to write '  /  /  ' for empty dates
-					if(s.trim().length) out[R][C] = s.replace(/([^\s])\s+$/,"$1");
+					if(s.trim().length) out[R][C] = s.replace(/\s+$/,"");
 					break;
 				case 'D':
-					if(s.length === 8) {
-						out[R][C] = new Date(Date.UTC(+s.slice(0,4), +s.slice(4,6)-1, +s.slice(6,8), 0, 0, 0, 0));
-						if(!(opts && opts.UTC)) { out[R][C] = utc_to_local(out[R][C]); }
-					}
+					if(s.length === 8) out[R][C] = new Date(+s.slice(0,4), +s.slice(4,6)-1, +s.slice(6,8));
 					else out[R][C] = s;
 					break;
 				case 'F': out[R][C] = parseFloat(s.trim()); break;
@ -190,7 +188,7 @@ function dbf_to_aoa(buf, opts)/*:AOA*/ {
 				case 'L': switch(s.trim().toUpperCase()) {
 					case 'Y': case 'T': out[R][C] = true; break;
 					case 'N': case 'F': out[R][C] = false; break;
-					case '': case '\x00': case '?': break;
+					case '': case '?': break;
 					default: throw new Error("DBF Unrecognized L:|" + s + "|");
 					} break;
 				case 'M': /* TODO: handle memo files */
@ -205,12 +203,7 @@ function dbf_to_aoa(buf, opts)/*:AOA*/ {
 					// NOTE: dBASE specs appear to be incorrect
 					out[R][C] = new Date(dd.read_shift(-8, 'f') - 0x388317533400);
 					break;
-				case 'T': {
-					var hi = dd.read_shift(4), lo = dd.read_shift(4);
-					if(hi == 0 && lo == 0) break;
-					out[R][C] = new Date((hi - 0x253D8C) * 0x5265C00 + lo);
-					if(!(opts && opts.UTC)) out[R][C] = utc_to_local(out[R][C]);
-				} break;
+				case 'T': out[R][C] = new Date((dd.read_shift(4) - 0x253D8C) * 0x5265C00 + dd.read_shift(4)); break;
 				case 'Y': out[R][C] = dd.read_shift(4,'i')/1e4 + (dd.read_shift(4, 'i')/1e4)*Math.pow(2,32); break;
 				case 'O': out[R][C] = -dd.read_shift(-8, 'f'); break;
 				case 'B': if(vfp && fields[C].len == 8) { out[R][C] = dd.read_shift(8,'f'); break; }
@ -242,19 +235,14 @@ function dbf_to_sheet(buf, opts)/*:Worksheet*/ {
 }

 function dbf_to_workbook(buf, opts)/*:Workbook*/ {
-	try {
-		var o = sheet_to_workbook(dbf_to_sheet(buf, opts), opts);
-		o.bookType = "dbf";
-		return o;
-	} catch(e) { if(opts && opts.WTF) throw e; }
+	try { return sheet_to_workbook(dbf_to_sheet(buf, opts), opts); }
+	catch(e) { if(opts && opts.WTF) throw e; }
 	return ({SheetNames:[],Sheets:{}});
 }

 var _RLEN = { 'B': 8, 'C': 250, 'L': 1, 'D': 8, '?': 0, '': 0 };
 function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
-	if(!ws["!ref"]) throw new Error("Cannot export empty sheet to DBF");
 	var o = opts || {};
-	var old_cp = current_codepage;
 	if(+o.codepage >= 0) set_cp(+o.codepage);
 	if(o.type == "string") throw new Error("Cannot write DBF to JS string");
 	var ba = buf_array();
@ -290,8 +278,7 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 				case 'object': _guess = col[j] instanceof Date ? 'D' : 'C'; break;
 				default: _guess = 'C';
 			}
-			/* TODO: cache the values instead of encoding twice */
-			maxlen = Math.max(maxlen, (typeof $cptable !== "undefined" && typeof col[j] == "string" ? $cptable.utils.encode(current_ansi, col[j]): String(col[j])).length);
+			maxlen = Math.max(maxlen, String(col[j]).length);
 			guess = guess && guess != _guess ? 'C' : _guess;
 			//if(guess == 'C') break;
 		}
@ -317,17 +304,11 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 	h.write_shift(2, 296 + 32 * hcnt);
 	h.write_shift(2, rlen);
 	for(i=0; i < 4; ++i) h.write_shift(4, 0);
-	var cp = +dbf_reverse_map[/*::String(*/current_codepage/*::)*/] || 0x03;
-	h.write_shift(4, 0x00000000 | (cp<<8));
-	if(dbf_codepage_map[cp] != +o.codepage) {
-		if(o.codepage) console.error("DBF Unsupported codepage " + current_codepage + ", using 1252");
-		current_codepage = 1252;
-	}
+	h.write_shift(4, 0x00000000 | ((+dbf_reverse_map[/*::String(*/current_ansi/*::)*/] || 0x03)<<8));

 	for(i = 0, j = 0; i < headers.length; ++i) {
 		if(headers[i] == null) continue;
 		var hf = ba.next(32);
-		/* TODO: test how applications handle non-ASCII field names */
 		var _f = (headers[i].slice(-10) + "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00").slice(0, 11);
 		hf.write_shift(1, _f, "sbcs");
 		hf.write_shift(1, coltypes[i] == '?' ? 'C' : coltypes[i], "sbcs");
@ -356,7 +337,6 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 				case 'N':
 					var _n = "0";
 					if(typeof data[i][j] == "number") _n = data[i][j].toFixed(coldecimals[j]||0);
-					if(_n.length > colwidths[j]) _n = _n.slice(0, colwidths[j]); // addresses decimal > width
 					for(hcnt=0; hcnt < colwidths[j]-_n.length; ++hcnt) rout.write_shift(1, 0x20);
 					rout.write_shift(1, _n, "sbcs");
 					break;
@ -368,16 +348,13 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 						rout.write_shift(2, ("00"+data[i][j].getDate()).slice(-2), "sbcs");
 					} break;
 				case 'C':
-					var _l = rout.l;
 					var _s = String(data[i][j] != null ? data[i][j] : "").slice(0, colwidths[j]);
-					rout.write_shift(1, _s, "cpstr");
-					_l += colwidths[j] - rout.l;
-					for(hcnt=0; hcnt < _l; ++hcnt) rout.write_shift(1, 0x20); break;
+					rout.write_shift(1, _s, "sbcs");
+					for(hcnt=0; hcnt < colwidths[j]-_s.length; ++hcnt) rout.write_shift(1, 0x20); break;
 			}
 		}
 		// data
 	}
-	current_codepage = old_cp;
 	ba.next(1).write_shift(1, 0x1A);
 	return ba.end();
 }
@ -404,22 +381,17 @@ var SYLK = /*#__PURE__*/(function() {
 		KC:'Ç', Kc:'ç', q:'æ',  z:'œ',  a:'Æ',  j:'Œ',
 		DN:209, Dn:241, Hy:255,
 		S:169,  c:170,  R:174,  "B ":180,
-		0:176,  1:177,  2:178,
-		3:179,  5:181,  6:182,
-		7:183,  Q:185,  k:186,  b:208,  i:216,  l:222,  s:240,  y:248,
+		/*::[*/0/*::]*/:176,    /*::[*/1/*::]*/:177,  /*::[*/2/*::]*/:178,
+		/*::[*/3/*::]*/:179,    /*::[*/5/*::]*/:181,  /*::[*/6/*::]*/:182,
+		/*::[*/7/*::]*/:183,    Q:185,  k:186,  b:208,  i:216,  l:222,  s:240,  y:248,
 		"!":161, '"':162, "#":163, "(":164, "%":165, "'":167, "H ":168,
 		"+":171, ";":187, "<":188, "=":189, ">":190, "?":191, "{":223
 	}/*:any*/);
-	var sylk_char_regex = new RegExp("\u001BN(" + keys(sylk_escapes).join("|").replace(/\|\|\|/, "|\\||").replace(/([?()+])/g,"\\$1").replace("{", "\\{") + "|\\|)", "gm");
-	try {
-		sylk_char_regex = new RegExp("\u001BN(" + keys(sylk_escapes).join("|").replace(/\|\|\|/, "|\\||").replace(/([?()+])/g,"\\$1") + "|\\|)", "gm");
-	} catch(e) {}
+	var sylk_char_regex = new RegExp("\u001BN(" + keys(sylk_escapes).join("|").replace(/\|\|\|/, "|\\||").replace(/([?()+])/g,"\\$1") + "|\\|)", "gm");
 	var sylk_char_fn = function(_, $1){ var o = sylk_escapes[$1]; return typeof o == "number" ? _getansi(o) : o; };
 	var decode_sylk_char = function($$, $1, $2) { var newcc = (($1.charCodeAt(0) - 0x20)<<4) | ($2.charCodeAt(0) - 0x30); return newcc == 59 ? $$ : _getansi(newcc); };
 	sylk_escapes["|"] = 254;
-	/* TODO: evert the escape map */
-	var encode_sylk_str = function($$) { return $$.replace(/\n/g, "\x1b :").replace(/\r/g, "\x1b ="); };
-	/* https://oss.sheetjs.com/notes/sylk/ for more details */
+	/* TODO: find an actual specification */
 	function sylk_to_aoa(d/*:RawData*/, opts)/*:[AOA, Worksheet]*/ {
 		switch(opts.type) {
 			case 'base64': return sylk_to_aoa_str(Base64_decode(d), opts);
@ -435,7 +407,6 @@ var SYLK = /*#__PURE__*/(function() {
 		var next_cell_format/*:string|null*/ = null;
 		var sht = {}, rowinfo/*:Array<RowInfo>*/ = [], colinfo/*:Array<ColInfo>*/ = [], cw/*:Array<string>*/ = [];
 		var Mval = 0, j;
-		var wb = { Workbook: { WBProps: {}, Names: [] } };
 		if(+opts.codepage >= 0) set_cp(+opts.codepage);
 		for (; ri !== records.length; ++ri) {
 			Mval = 0;
@ -446,102 +417,74 @@ var SYLK = /*#__PURE__*/(function() {
 			case 'ID': break; /* header */
 			case 'E': break; /* EOF */
 			case 'B': break; /* dimensions */
-			case 'O': /* workbook options */
-			for(rj=1; rj<record.length; ++rj) switch(record[rj].charAt(0)) {
-				case 'V': {
-					var d1904 = parseInt(record[rj].slice(1), 10);
-					// NOTE: it is technically an error if d1904 >= 5 or < 0
-					if(d1904 >= 1 && d1904 <= 4) wb.Workbook.WBProps.date1904 = true;
-				} break;
-			} break;
-			case 'W': break; /* window */
+			case 'O': break; /* options? */
+			case 'W': break; /* window? */
 			case 'P':
-				switch(record[1].charAt(0)){
-					case 'P': formats.push(rstr.slice(3).replace(/;;/g, ";")); break;
-				} break;
-			case 'NN': { /* defined name */
-				var nn = {Sheet: 0};
-				for(rj=1; rj<record.length; ++rj) switch(record[rj].charAt(0)) {
-					case 'N': nn.Name = record[rj].slice(1); break;
-					case 'E': nn.Ref = (opts && opts.sheet || "Sheet1") + "!" + rc_to_a1(record[rj].slice(1)); break;
-				}
-				wb.Workbook.Names.push(nn);
-			} break;
-			// case 'NE': // ??
-			// case 'NU': // ??
-			case 'C': /* cell */
-			var C_seen_K = false, C_seen_X = false, C_seen_S = false, C_seen_E = false, _R = -1, _C = -1, formula = "", cell_t = "z";
-			var cmnt = "";
+				if(record[1].charAt(0) == 'P')
+					formats.push(rstr.slice(3).replace(/;;/g, ";"));
+				break;
+			case 'C':
+			var C_seen_K = false, C_seen_X = false, C_seen_S = false, C_seen_E = false, _R = -1, _C = -1;
 			for(rj=1; rj<record.length; ++rj) switch(record[rj].charAt(0)) {
-				case 'A': cmnt = record[rj].slice(1); break; // TODO: comment
-				case 'X': C = parseInt(record[rj].slice(1), 10)-1; C_seen_X = true; break;
+				case 'A': break; // TODO: comment
+				case 'X': C = parseInt(record[rj].slice(1))-1; C_seen_X = true; break;
 				case 'Y':
-					R = parseInt(record[rj].slice(1), 10)-1; if(!C_seen_X) C = 0;
+					R = parseInt(record[rj].slice(1))-1; if(!C_seen_X) C = 0;
 					for(j = arr.length; j <= R; ++j) arr[j] = [];
 					break;
 				case 'K':
 					val = record[rj].slice(1);
-					if(val.charAt(0) === '"') { val = val.slice(1,val.length - 1); cell_t = "s"; }
-					else if(val === 'TRUE' || val === 'FALSE') { val = val === 'TRUE'; cell_t = "b"; }
-					else if(val.charAt(0) == "#" && RBErr[val] != null) { cell_t = "e"; val = RBErr[val]; }
+					if(val.charAt(0) === '"') val = val.slice(1,val.length - 1);
+					else if(val === 'TRUE') val = true;
+					else if(val === 'FALSE') val = false;
 					else if(!isNaN(fuzzynum(val))) {
-						val = fuzzynum(val); cell_t = "n";
-						if(next_cell_format !== null && fmt_is_date(next_cell_format) && opts.cellDates) {
-							val = numdate(wb.Workbook.WBProps.date1904 ? val + 1462 : val); cell_t = typeof val == "number" ? "n" : "d";
-						}
+						val = fuzzynum(val);
+						if(next_cell_format !== null && fmt_is_date(next_cell_format)) val = numdate(val);
+					} else if(!isNaN(fuzzydate(val).getDate())) {
+						val = parseDate(val);
 					}
 					if(typeof $cptable !== 'undefined' && typeof val == "string" && ((opts||{}).type != "string") && (opts||{}).codepage) val = $cptable.utils.decode(opts.codepage, val);
 					C_seen_K = true;
 					break;
 				case 'E':
 					C_seen_E = true;
-					formula = rc_to_a1(record[rj].slice(1), {r:R,c:C});
+					var formula = rc_to_a1(record[rj].slice(1), {r:R,c:C});
+					arr[R][C] = [arr[R][C], formula];
 					break;
 				case 'S':
 					C_seen_S = true;
+					arr[R][C] = [arr[R][C], "S5S"];
 					break;
 				case 'G': break; // unknown
-				case 'R': _R = parseInt(record[rj].slice(1), 10)-1; break;
-				case 'C': _C = parseInt(record[rj].slice(1), 10)-1; break;
-				// case 'P': // ??
-				// case 'D': // ??
+				case 'R': _R = parseInt(record[rj].slice(1))-1; break;
+				case 'C': _C = parseInt(record[rj].slice(1))-1; break;
 				default: if(opts && opts.WTF) throw new Error("SYLK bad record " + rstr);
 			}
 			if(C_seen_K) {
-				if(!arr[R][C]) arr[R][C] = { t: cell_t, v: val };
-				else { arr[R][C].t = cell_t; arr[R][C].v = val; }
-				if(next_cell_format) arr[R][C].z = next_cell_format;
-				if(opts.cellText !== false && next_cell_format) arr[R][C].w = SSF_format(arr[R][C].z, arr[R][C].v, { date1904: wb.Workbook.WBProps.date1904 });
+				if(arr[R][C] && arr[R][C].length == 2) arr[R][C][0] = val;
+				else arr[R][C] = val;
 				next_cell_format = null;
 			}
 			if(C_seen_S) {
 				if(C_seen_E) throw new Error("SYLK shared formula cannot have own formula");
 				var shrbase = _R > -1 && arr[_R][_C];
 				if(!shrbase || !shrbase[1]) throw new Error("SYLK shared formula cannot find base");
-				formula = shift_formula_str(shrbase[1], {r: R - _R, c: C - _C});
-			}
-			if(formula) {
-				if(!arr[R][C]) arr[R][C] = { t: 'n', f: formula };
-				else arr[R][C].f = formula;
-			}
-			if(cmnt) {
-				if(!arr[R][C]) arr[R][C] = { t: 'z' };
-				arr[R][C].c = [{a:"SheetJSYLK", t: cmnt}];
+				arr[R][C][1] = shift_formula_str(shrbase[1], {r: R - _R, c: C - _C});
 			}
 			break;
-			case 'F': /* Format */
+			case 'F':
 			var F_seen = 0;
 			for(rj=1; rj<record.length; ++rj) switch(record[rj].charAt(0)) {
-				case 'X': C = parseInt(record[rj].slice(1), 10)-1; ++F_seen; break;
+				case 'X': C = parseInt(record[rj].slice(1))-1; ++F_seen; break;
 				case 'Y':
-					R = parseInt(record[rj].slice(1), 10)-1; /*C = 0;*/
+					R = parseInt(record[rj].slice(1))-1; /*C = 0;*/
 					for(j = arr.length; j <= R; ++j) arr[j] = [];
 					break;
-				case 'M': Mval = parseInt(record[rj].slice(1), 10) / 20; break;
+				case 'M': Mval = parseInt(record[rj].slice(1)) / 20; break;
 				case 'F': break; /* ??? */
 				case 'G': break; /* hide grid */
 				case 'P':
-					next_cell_format = formats[parseInt(record[rj].slice(1), 10)];
+					next_cell_format = formats[parseInt(record[rj].slice(1))];
 					break;
 				case 'S': break; /* cell style */
 				case 'D': break; /* column */
@ -550,20 +493,18 @@ var SYLK = /*#__PURE__*/(function() {
 					cw = record[rj].slice(1).split(" ");
 					for(j = parseInt(cw[0], 10); j <= parseInt(cw[1], 10); ++j) {
 						Mval = parseInt(cw[2], 10);
-						colinfo[j-1] = Mval === 0 ? {hidden:true}: {wch:Mval};
+						colinfo[j-1] = Mval === 0 ? {hidden:true}: {wch:Mval}; process_col(colinfo[j-1]);
 					} break;
 				case 'C': /* default column format */
-					C = parseInt(record[rj].slice(1), 10)-1;
+					C = parseInt(record[rj].slice(1))-1;
 					if(!colinfo[C]) colinfo[C] = {};
 					break;
 				case 'R': /* row properties */
-					R = parseInt(record[rj].slice(1), 10)-1;
+					R = parseInt(record[rj].slice(1))-1;
 					if(!rowinfo[R]) rowinfo[R] = {};
 					if(Mval > 0) { rowinfo[R].hpt = Mval; rowinfo[R].hpx = pt2px(Mval); }
 					else if(Mval === 0) rowinfo[R].hidden = true;
 					break;
-				// case 'K': // ??
-				// case 'E': // ??
 				default: if(opts && opts.WTF) throw new Error("SYLK bad record " + rstr);
 			}
 			if(F_seen < 1) next_cell_format = null; break;
@ -572,44 +513,34 @@ var SYLK = /*#__PURE__*/(function() {
 		}
 		if(rowinfo.length > 0) sht['!rows'] = rowinfo;
 		if(colinfo.length > 0) sht['!cols'] = colinfo;
-		colinfo.forEach(function(col) { process_col(col); });
 		if(opts && opts.sheetRows) arr = arr.slice(0, opts.sheetRows);
-		return [arr, sht, wb];
+		return [arr, sht];
 	}

-	function sylk_to_workbook(d/*:RawData*/, opts)/*:Workbook*/ {
+	function sylk_to_sheet(d/*:RawData*/, opts)/*:Worksheet*/ {
 		var aoasht = sylk_to_aoa(d, opts);
-		var aoa = aoasht[0], ws = aoasht[1], wb = aoasht[2];
-		var _opts = dup(opts); _opts.date1904 = (((wb||{}).Workbook || {}).WBProps || {}).date1904;
-		var o = aoa_to_sheet(aoa, _opts);
+		var aoa = aoasht[0], ws = aoasht[1];
+		var o = aoa_to_sheet(aoa, opts);
 		keys(ws).forEach(function(k) { o[k] = ws[k]; });
-		var outwb = sheet_to_workbook(o, opts);
-		keys(wb).forEach(function(k) { outwb[k] = wb[k]; });
-		outwb.bookType = "sylk";
-		return outwb;
+		return o;
 	}

-	function write_ws_cell_sylk(cell/*:Cell*/, ws/*:Worksheet*/, R/*:number*/, C/*:number*/, opts, date1904/*:boolean*/)/*:string*/ {
+	function sylk_to_workbook(d/*:RawData*/, opts)/*:Workbook*/ { return sheet_to_workbook(sylk_to_sheet(d, opts), opts); }
+
+	function write_ws_cell_sylk(cell/*:Cell*/, ws/*:Worksheet*/, R/*:number*/, C/*:number*//*::, opts*/)/*:string*/ {
 		var o = "C;Y" + (R+1) + ";X" + (C+1) + ";K";
 		switch(cell.t) {
 			case 'n':
 				o += (cell.v||0);
 				if(cell.f && !cell.F) o += ";E" + a1_to_rc(cell.f, {r:R, c:C}); break;
 			case 'b': o += cell.v ? "TRUE" : "FALSE"; break;
-			case 'e': o += cell.w || BErr[cell.v] || cell.v; break;
-			case 'd': o += datenum(parseDate(cell.v, date1904), date1904); break;
-			case 's': o += '"' + (cell.v == null ? "" : String(cell.v)).replace(/"/g,"").replace(/;/g, ";;") + '"'; break;
+			case 'e': o += cell.w || cell.v; break;
+			case 'd': o += '"' + (cell.w || cell.v) + '"'; break;
+			case 's': o += '"' + cell.v.replace(/"/g,"").replace(/;/g, ";;") + '"'; break;
 		}
 		return o;
 	}

-	function write_ws_cmnt_sylk(cmnt/*:Comment*/, R/*:number*/, C/*:number*/)/*:string*/ {
-		var o = "C;Y" + (R+1) + ";X" + (C+1) + ";A";
-		/* TODO: max length? */
-		o += encode_sylk_str(cmnt.map(function(c) { return c.t; }).join(""));
-		return o;
-	}
-
 	function write_ws_cols_sylk(out, cols) {
 		cols.forEach(function(col, i) {
 			var rec = "F;W" + (i+1) + " " + (i+1) + " ";
@ -633,58 +564,32 @@ var SYLK = /*#__PURE__*/(function() {
 		});
 	}

-	function sheet_to_sylk(ws/*:Worksheet*/, opts/*:?any*/, wb/*:?WorkBook*/)/*:string*/ {
-		if(!opts) opts = {}; opts._formats = ["General"];
-		/* TODO: codepage */
-		var preamble/*:Array<string>*/ = ["ID;PSheetJS;N;E"], o/*:Array<string>*/ = [];
-		var r = safe_decode_range(ws['!ref']||"A1"), cell/*:Cell*/;
-		var dense = ws["!data"] != null;
+	function sheet_to_sylk(ws/*:Worksheet*/, opts/*:?any*/)/*:string*/ {
+		var preamble/*:Array<string>*/ = ["ID;PWXL;N;E"], o/*:Array<string>*/ = [];
+		var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
+		var dense = Array.isArray(ws);
 		var RS = "\r\n";
-		var d1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;

-		var _lastfmt = "General";
 		preamble.push("P;PGeneral");
-		/* Excel has been inconsistent in comment placement */
-		var R = r.s.r, C = r.s.c, p = [];
-		if(ws["!ref"]) for(R = r.s.r; R <= r.e.r; ++R) {
-			if(dense && !ws["!data"][R]) continue;
-			p = [];
-			for(C = r.s.c; C <= r.e.c; ++C) {
-				cell = dense ? ws["!data"][R][C] : ws[encode_col(C) + encode_row(R)];
-				if(!cell || !cell.c) continue;
-				p.push(write_ws_cmnt_sylk(cell.c, R, C));
-			}
-			if(p.length) o.push(p.join(RS));
-		}
-		if(ws["!ref"]) for(R = r.s.r; R <= r.e.r; ++R) {
-			if(dense && !ws["!data"][R]) continue;
-			p = [];
-			for(C = r.s.c; C <= r.e.c; ++C) {
-				cell = dense ? ws["!data"][R][C] : ws[encode_col(C) + encode_row(R)];
-				if(!cell || (cell.v == null && (!cell.f || cell.F))) continue;
-				if((cell.z||(cell.t == "d" ? table_fmt[14] : "General")) != _lastfmt) {
-					var ifmt = opts._formats.indexOf(cell.z);
-					if(ifmt == -1) { opts._formats.push(cell.z); ifmt = opts._formats.length - 1; preamble.push("P;P" + cell.z.replace(/;/g, ";;")); }
-					p.push("F;P" + ifmt + ";Y" + (R+1) + ";X" + (C+1));
-				}
-				p.push(write_ws_cell_sylk(cell, ws, R, C, opts, d1904));
-			}
-			o.push(p.join(RS));
-		}
-
 		preamble.push("F;P0;DG0G8;M255");
 		if(ws['!cols']) write_ws_cols_sylk(preamble, ws['!cols']);
 		if(ws['!rows']) write_ws_rows_sylk(preamble, ws['!rows']);

-		if(ws["!ref"]) preamble.push("B;Y" + (r.e.r - r.s.r + 1) + ";X" + (r.e.c - r.s.c + 1) + ";D" + [r.s.c,r.s.r,r.e.c,r.e.r].join(" "));
-		preamble.push("O;L;D;B" + (d1904 ? ";V4" : "") + ";K47;G100 0.001");
-
-		delete opts._formats;
+		preamble.push("B;Y" + (r.e.r - r.s.r + 1) + ";X" + (r.e.c - r.s.c + 1) + ";D" + [r.s.c,r.s.r,r.e.c,r.e.r].join(" "));
+		for(var R = r.s.r; R <= r.e.r; ++R) {
+			for(var C = r.s.c; C <= r.e.c; ++C) {
+				var coord = encode_cell({r:R,c:C});
+				cell = dense ? (ws[R]||[])[C]: ws[coord];
+				if(!cell || (cell.v == null && (!cell.f || cell.F))) continue;
+				o.push(write_ws_cell_sylk(cell, ws, R, C, opts));
+			}
+		}
 		return preamble.join(RS) + RS + o.join(RS) + RS + "E" + RS;
 	}

 	return {
 		to_workbook: sylk_to_workbook,
+		to_sheet: sylk_to_sheet,
 		from_sheet: sheet_to_sylk
 	};
 })();
@ -719,10 +624,7 @@ var DIF = /*#__PURE__*/(function() {
 					if(data === 'TRUE') arr[R][C] = true;
 					else if(data === 'FALSE') arr[R][C] = false;
 					else if(!isNaN(fuzzynum(value))) arr[R][C] = fuzzynum(value);
-					else if(!isNaN(fuzzydate(value).getDate())) {
-						arr[R][C] = parseDate(value);
-						if(!(opts && opts.UTC)) { arr[R][C] = utc_to_local(arr[R][C]); }
-					}
+					else if(!isNaN(fuzzydate(value).getDate())) arr[R][C] = parseDate(value);
 					else arr[R][C] = value;
 					++C; break;
 				case 1:
@ -739,62 +641,64 @@ var DIF = /*#__PURE__*/(function() {
 	}

 	function dif_to_sheet(str/*:string*/, opts)/*:Worksheet*/ { return aoa_to_sheet(dif_to_aoa(str, opts), opts); }
-	function dif_to_workbook(str/*:string*/, opts)/*:Workbook*/ {
-		var o = sheet_to_workbook(dif_to_sheet(str, opts), opts);
-		o.bookType = "dif";
-		return o;
-	}
+	function dif_to_workbook(str/*:string*/, opts)/*:Workbook*/ { return sheet_to_workbook(dif_to_sheet(str, opts), opts); }

-	function make_value(v/*:number*/, s/*:string*/)/*:string*/ { return "0," + String(v) + "\r\n" + s; }
-	function make_value_str(s/*:string*/)/*:string*/ { return "1,0\r\n\"" + s.replace(/"/g,'""') + '"'; }
-	function sheet_to_dif(ws/*:Worksheet*//*::, opts:?any*/)/*:string*/ {
-		var _DIF_XL = DIF_XL;
-		if(!ws["!ref"]) throw new Error("Cannot export empty sheet to DIF");
-		var r = safe_decode_range(ws['!ref']);
-		var dense = ws["!data"] != null;
-		var o/*:Array<string>*/ = [
-			"TABLE\r\n0,1\r\n\"sheetjs\"\r\n",
-			"VECTORS\r\n0," + (r.e.r - r.s.r + 1) + "\r\n\"\"\r\n",
-			"TUPLES\r\n0," + (r.e.c - r.s.c + 1) + "\r\n\"\"\r\n",
-			"DATA\r\n0,0\r\n\"\"\r\n"
-		];
-		for(var R = r.s.r; R <= r.e.r; ++R) {
-			var row = dense ? ws["!data"][R] : [];
-			var p = "-1,0\r\nBOT\r\n";
-			for(var C = r.s.c; C <= r.e.c; ++C) {
-				var cell/*:Cell*/ = dense ? (row && row[C]) : ws[encode_cell({r:R,c:C})];
-				if(cell == null) { p +=("1,0\r\n\"\"\r\n"); continue;}
-				switch(cell.t) {
-					case 'n':
-						if(_DIF_XL) {
-							if(cell.w != null) p +=("0," + cell.w + "\r\nV");
-							else if(cell.v != null) p +=(make_value(cell.v, "V")); // TODO: should this call SSF_format?
-							else if(cell.f != null && !cell.F) p +=(make_value_str("=" + cell.f));
-							else p +=("1,0\r\n\"\"");
-						} else {
-							if(cell.v == null) p +=("1,0\r\n\"\"");
-							else p +=(make_value(cell.v, "V"));
-						}
-						break;
-					case 'b':
-						p +=(cell.v ? make_value(1, "TRUE") : make_value(0, "FALSE"));
-						break;
-					case 's':
-						p +=(make_value_str((!_DIF_XL || isNaN(+cell.v)) ? cell.v : '="' + cell.v + '"'));
-						break;
-					case 'd':
-						if(!cell.w) cell.w = SSF_format(cell.z || table_fmt[14], datenum(parseDate(cell.v)));
-						if(_DIF_XL) p +=(make_value(cell.w, "V"));
-						else p +=(make_value_str(cell.w));
-						break;
-					default: p +=("1,0\r\n\"\"");
+	var sheet_to_dif = /*#__PURE__*/(function() {
+		var push_field = function pf(o/*:Array<string>*/, topic/*:string*/, v/*:number*/, n/*:number*/, s/*:string*/) {
+			o.push(topic);
+			o.push(v + "," + n);
+			o.push('"' + s.replace(/"/g,'""') + '"');
+		};
+		var push_value = function po(o/*:Array<string>*/, type/*:number*/, v/*:any*/, s/*:string*/) {
+			o.push(type + "," + v);
+			o.push(type == 1 ? '"' + s.replace(/"/g,'""') + '"' : s);
+		};
+		return function sheet_to_dif(ws/*:Worksheet*//*::, opts:?any*/)/*:string*/ {
+			var o/*:Array<string>*/ = [];
+			var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
+			var dense = Array.isArray(ws);
+			push_field(o, "TABLE", 0, 1, "sheetjs");
+			push_field(o, "VECTORS", 0, r.e.r - r.s.r + 1,"");
+			push_field(o, "TUPLES", 0, r.e.c - r.s.c + 1,"");
+			push_field(o, "DATA", 0, 0,"");
+			for(var R = r.s.r; R <= r.e.r; ++R) {
+				push_value(o, -1, 0, "BOT");
+				for(var C = r.s.c; C <= r.e.c; ++C) {
+					var coord = encode_cell({r:R,c:C});
+					cell = dense ? (ws[R]||[])[C] : ws[coord];
+					if(!cell) { push_value(o, 1, 0, ""); continue;}
+					switch(cell.t) {
+						case 'n':
+							var val = DIF_XL ? cell.w : cell.v;
+							if(!val && cell.v != null) val = cell.v;
+							if(val == null) {
+								if(DIF_XL && cell.f && !cell.F) push_value(o, 1, 0, "=" + cell.f);
+								else push_value(o, 1, 0, "");
+							}
+							else push_value(o, 0, val, "V");
+							break;
+						case 'b':
+							push_value(o, 0, cell.v ? 1 : 0, cell.v ? "TRUE" : "FALSE");
+							break;
+						case 's':
+							push_value(o, 1, 0, (!DIF_XL || isNaN(cell.v)) ? cell.v : '="' + cell.v + '"');
+							break;
+						case 'd':
+							if(!cell.w) cell.w = SSF_format(cell.z || table_fmt[14], datenum(parseDate(cell.v)));
+							if(DIF_XL) push_value(o, 0, cell.w, "V");
+							else push_value(o, 1, 0, cell.w);
+							break;
+						default: push_value(o, 1, 0, "");
+					}
 				}
-				p += "\r\n";
 			}
-			o.push(p);
-		}
-		return o.join("") + "-1,0\r\nEOD";
-	}
+			push_value(o, -1, 0, "EOD");
+			var RS = "\r\n";
+			var oo = o.join(RS);
+			//while((oo.length & 0x7F) != 0) oo += "\0";
+			return oo;
+		};
+	})();
 	return {
 		to_workbook: dif_to_workbook,
 		to_sheet: dif_to_sheet,
@ -857,11 +761,11 @@ var ETH = /*#__PURE__*/(function() {
 		if(!ws || !ws['!ref']) return "";
 		var o/*:Array<string>*/ = [], oo/*:Array<string>*/ = [], cell, coord = "";
 		var r = decode_range(ws['!ref']);
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		for(var R = r.s.r; R <= r.e.r; ++R) {
 			for(var C = r.s.c; C <= r.e.c; ++C) {
 				coord = encode_cell({r:R,c:C});
-				cell = dense ? (ws["!data"][R]||[])[C] : ws[coord];
+				cell = dense ? (ws[R]||[])[C] : ws[coord];
 				if(!cell || cell.v == null || cell.t === 'z') continue;
 				oo = ["cell", coord, 't'];
 				switch(cell.t) {
@ -941,18 +845,18 @@ var PRN = /*#__PURE__*/(function() {

 	// List of accepted CSV separators
 	var guess_seps = {
-		0x2C: ',',
-		0x09: "\t",
-		0x3B: ';',
-		0x7C: '|'
+		/*::[*/0x2C/*::]*/: ',',
+		/*::[*/0x09/*::]*/: "\t",
+		/*::[*/0x3B/*::]*/: ';',
+		/*::[*/0x7C/*::]*/: '|'
 	};

 	// CSV separator weights to be used in case of equal numbers
 	var guess_sep_weights = {
-		0x2C: 3,
-		0x09: 2,
-		0x3B: 1,
-		0x7C: 0
+		/*::[*/0x2C/*::]*/: 3,
+		/*::[*/0x09/*::]*/: 2,
+		/*::[*/0x3B/*::]*/: 1,
+		/*::[*/0x7C/*::]*/: 0
 	};

 	function guess_sep(str) {
@ -983,8 +887,7 @@ var PRN = /*#__PURE__*/(function() {
 		var o = opts || {};
 		var sep = "";
 		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var ws/*:Worksheet*/ = ({}/*:any*/);
-		if(o.dense) ws["!data"] = [];
+		var ws/*:Worksheet*/ = o.dense ? ([]/*:any*/) : ({}/*:any*/);
 		var range/*:Range*/ = ({s: {c:0, r:0}, e: {c:0, r:0}}/*:any*/);

 		if(str.slice(0,4) == "sep=") {
@ -1002,37 +905,36 @@ var PRN = /*#__PURE__*/(function() {
 		else sep = guess_sep(str.slice(0,1024));
 		var R = 0, C = 0, v = 0;
 		var start = 0, end = 0, sepcc = sep.charCodeAt(0), instr = false, cc=0, startcc=str.charCodeAt(0);
+		str = str.replace(/\r\n/mg, "\n");
 		var _re/*:?RegExp*/ = o.dateNF != null ? dateNF_regex(o.dateNF) : null;
 		function finish_cell() {
-			/* TODO: fuzzy parsers should pass back assumed number format */
-			var s = str.slice(start, end); if(s.slice(-1) == "\r") s = s.slice(0, -1);
+			var s = str.slice(start, end);
 			var cell = ({}/*:any*/);
 			if(s.charAt(0) == '"' && s.charAt(s.length - 1) == '"') s = s.slice(1,-1).replace(/""/g,'"');
-			if(o.cellText !== false) cell.w = s;
 			if(s.length === 0) cell.t = 'z';
 			else if(o.raw) { cell.t = 's'; cell.v = s; }
 			else if(s.trim().length === 0) { cell.t = 's'; cell.v = s; }
 			else if(s.charCodeAt(0) == 0x3D) {
 				if(s.charCodeAt(1) == 0x22 && s.charCodeAt(s.length - 1) == 0x22) { cell.t = 's'; cell.v = s.slice(2,-1).replace(/""/g,'"'); }
-				else if(fuzzyfmla(s)) { cell.t = 's'; cell.f = s.slice(1); cell.v = s; }
+				else if(fuzzyfmla(s)) { cell.t = 'n'; cell.f = s.slice(1); }
 				else { cell.t = 's'; cell.v = s; } }
 			else if(s == "TRUE") { cell.t = 'b'; cell.v = true; }
 			else if(s == "FALSE") { cell.t = 'b'; cell.v = false; }
-			else if(!isNaN(v = fuzzynum(s))) { cell.t = 'n'; cell.v = v; }
-			else if(!isNaN((v = fuzzydate(s)).getDate()) || _re && s.match(_re)) {
+			else if(!isNaN(v = fuzzynum(s))) { cell.t = 'n'; if(o.cellText !== false) cell.w = s; cell.v = v; }
+			else if(!isNaN(fuzzydate(s).getDate()) || _re && s.match(_re)) {
 				cell.z = o.dateNF || table_fmt[14];
-				if(_re && s.match(_re)){ var news=dateNF_fix(s, o.dateNF, (s.match(_re)||[])); v = parseDate(news); if(o && o.UTC === false) v = utc_to_local(v); }
-				else if(o && o.UTC === false) v = utc_to_local(v);
-				else if(o.cellText !== false && o.dateNF) cell.w = SSF_format(cell.z, v);
-				if(o.cellDates) { cell.t = 'd'; cell.v = v; }
-				else { cell.t = 'n'; cell.v = datenum(v); }
+				var k = 0;
+				if(_re && s.match(_re)){ s=dateNF_fix(s, o.dateNF, (s.match(_re)||[])); k=1; }
+				if(o.cellDates) { cell.t = 'd'; cell.v = parseDate(s, k); }
+				else { cell.t = 'n'; cell.v = datenum(parseDate(s, k)); }
+				if(o.cellText !== false) cell.w = SSF_format(cell.z, cell.v instanceof Date ? datenum(cell.v):cell.v);
 				if(!o.cellNF) delete cell.z;
 			} else {
 				cell.t = 's';
 				cell.v = s;
 			}
 			if(cell.t == 'z'){}
-			else if(o.dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = cell; }
+			else if(o.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = cell; }
 			else ws[encode_cell({c:C,r:R})] = cell;
 			start = end+1; startcc = str.charCodeAt(start);
 			if(range.e.c < C) range.e.c = C;
@ -1041,11 +943,7 @@ var PRN = /*#__PURE__*/(function() {
 		}
 		outer: for(;end < str.length;++end) switch((cc=str.charCodeAt(end))) {
 			case 0x22: if(startcc === 0x22) instr = !instr; break;
-			case 0x0d:
-				if(instr) break;
-				if(str.charCodeAt(end+1) == 0x0a) ++end;
-				/* falls through */
-			case sepcc: case 0x0a: if(!instr && finish_cell()) break outer; break;
+			case sepcc: case 0x0a: case 0x0d: if(!instr && finish_cell()) break outer; break;
 			default: break;
 		}
 		if(end - start > 0) finish_cell();
@ -1087,14 +985,13 @@ var PRN = /*#__PURE__*/(function() {

 	function sheet_to_prn(ws/*:Worksheet*//*::, opts:?any*/)/*:string*/ {
 		var o/*:Array<string>*/ = [];
-		if(!ws["!ref"]) return "";
 		var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		for(var R = r.s.r; R <= r.e.r; ++R) {
 			var oo/*:Array<string>*/ = [];
 			for(var C = r.s.c; C <= r.e.c; ++C) {
 				var coord = encode_cell({r:R,c:C});
-				cell = dense ? (ws["!data"][R]||[])[C] : ws[coord];
+				cell = dense ? (ws[R]||[])[C] : ws[coord];
 				if(!cell || cell.v == null) { oo.push("          "); continue; }
 				var w = (cell.w || (format_cell(cell), cell.w) || "").slice(0,10);
 				while(w.length < 10) w += " ";
@ -1121,7 +1018,7 @@ function read_wb_ID(d, opts) {
 		return out;
 	} catch(e) {
 		o.WTF = OLD_WTF;
-		if((e.message.indexOf("SYLK bad record ID") == -1) && OLD_WTF) throw e;
+		if(!e.message.match(/SYLK bad record ID/) && OLD_WTF) throw e;
 		return PRN.to_workbook(d, opts);
 	}
 }
--- a/bits/41_lotus.js
+++ b/bits/41_lotus.js
@ -24,35 +24,16 @@ var WK_ = /*#__PURE__*/(function() {
 		throw "Unsupported type " + opts.type;
 	}

-	/* NOTE: this list intentionally starts at 1 */
-	var LOTUS_DATE_FMTS = [
-		"mmmm",
-		"dd-mmm-yyyy",
-		"dd-mmm",
-		"mmm-yyyy",
-		"@", // "text"?
-		"mm/dd",
-		"hh:mm:ss AM/PM", // 7
-		"hh:mm AM/PM",
-		"mm/dd/yyyy",
-		"mm/dd",
-		"hh:mm:ss",
-		"hh:mm" // 12
-	];
-
 	function lotus_to_workbook_buf(d, opts)/*:Workbook*/ {
 		if(!d) return d;
 		var o = opts || {};
 		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var s/*:Worksheet*/ = ({}/*:any*/), n = "Sheet1", next_n = "", sidx = 0;
-		var sheets = {}, snames = [], realnames = [], sdata = [];
-		if(o.dense) sdata = s["!data"] = [];
+		var s/*:Worksheet*/ = ((o.dense ? [] : {})/*:any*/), n = "Sheet1", next_n = "", sidx = 0;
+		var sheets = {}, snames = [], realnames = [];

 		var refguess = {s: {r:0, c:0}, e: {r:0, c:0} };
 		var sheetRows = o.sheetRows || 0;
-		var lastcell = {};

-		if(d[4] == 0x51 && d[5] == 0x50 && d[6] == 0x57) return qpw_to_workbook_buf(d, opts);
 		if(d[2] == 0x00) {
 			if(d[3] == 0x08 || d[3] == 0x09) {
 				if(d.length >= 16 && d[14] == 0x05 && d[15] === 0x6c) throw new Error("Unsupported Works 3 for Mac file");
@ -66,25 +47,20 @@ var WK_ = /*#__PURE__*/(function() {
 					o.vers = val;
 					if(val >= 0x1000) o.qpro = true;
 					break;
-				case 0xFF: /* BOF (works 3+) */
-					o.vers = val;
-					o.works = true;
-					break;
 				case 0x06: refguess = val; break; /* RANGE */
 				case 0xCC: if(val) next_n = val; break; /* SHEETNAMECS */
 				case 0xDE: next_n = val; break; /* SHEETNAMELP */
 				case 0x0F: /* LABEL */
 				case 0x33: /* STRING */
-					if((!o.qpro && !o.works || RT == 0x33) && val[1].v.charCodeAt(0) < 0x30) val[1].v = val[1].v.slice(1);
-					if(o.works || o.works2) val[1].v = val[1].v.replace(/\r\n/g, "\n");
+					if(!o.qpro) val[1].v = val[1].v.slice(1);
 					/* falls through */
 				case 0x0D: /* INTEGER */
 				case 0x0E: /* NUMBER */
 				case 0x10: /* FORMULA */
 					/* TODO: actual translation of the format code */
-					if((val[2] & 0x70) == 0x70 && (val[2] & 0x0F) > 1 && (val[2] & 0x0F) < 15) {
-						val[1].z = o.dateNF || LOTUS_DATE_FMTS[(val[2] & 0x0F)-1] || table_fmt[14];
-						if(o.cellDates) { val[1].v = numdate(val[1].v); val[1].t = typeof val[1].v == "number" ? 'n' : 'd'; }
+					if(RT == 0x0E && (val[2] & 0x70) == 0x70 && (val[2] & 0x0F) > 1 && (val[2] & 0x0F) < 15) {
+						val[1].z = o.dateNF || table_fmt[14];
+						if(o.cellDates) { val[1].t = 'd'; val[1].v = numdate(val[1].v); }
 					}

 					if(o.qpro) {
@ -92,36 +68,25 @@ var WK_ = /*#__PURE__*/(function() {
 							s["!ref"] = encode_range(refguess);
 							sheets[n] = s;
 							snames.push(n);
-							s = ({}/*:any*/); if(o.dense) sdata = s["!data"] = [];
+							s = (o.dense ? [] : {});
 							refguess = {s: {r:0, c:0}, e: {r:0, c:0} };
 							sidx = val[3]; n = next_n || "Sheet" + (sidx + 1); next_n = "";
 						}
 					}

-					var tmpcell = o.dense ? (sdata[val[0].r]||[])[val[0].c] : s[encode_cell(val[0])];
+					var tmpcell = o.dense ? (s[val[0].r]||[])[val[0].c] : s[encode_cell(val[0])];
 					if(tmpcell) {
 						tmpcell.t = val[1].t; tmpcell.v = val[1].v;
 						if(val[1].z != null) tmpcell.z = val[1].z;
 						if(val[1].f != null) tmpcell.f = val[1].f;
-						lastcell = tmpcell;
 						break;
 					}
 					if(o.dense) {
-						if(!sdata[val[0].r]) sdata[val[0].r] = [];
-						sdata[val[0].r][val[0].c] = val[1];
+						if(!s[val[0].r]) s[val[0].r] = [];
+						s[val[0].r][val[0].c] = val[1];
 					} else s[encode_cell(val[0])] = val[1];
-					lastcell = val[1];
 					break;
-				case 0x5405: o.works2 = true; break;
-				case 0x5402: {
-					/* TODO: enumerate all extended number formats */
-					if(val == 0x14a1) {
-						lastcell.z = "hh:mm:ss";
-						if(o.cellDates && lastcell.t == "n") {
-							lastcell.v = numdate(lastcell.v); lastcell.t = typeof lastcell.v == "number" ? 'n' : 'd';
-						}
-					}
-				} break;
+				default:
 			}}, o);
 		} else if(d[2] == 0x1A || d[2] == 0x0E) {
 			o.Enum = WK3Enum;
@ -129,9 +94,7 @@ var WK_ = /*#__PURE__*/(function() {
 			lotushopper(d, function(val, R, RT) { switch(RT) {
 				case 0xCC: n = val; break; /* SHEETNAMECS */
 				case 0x16: /* LABEL16 */
-					if(val[1].v.charCodeAt(0) < 0x30) val[1].v = val[1].v.slice(1);
-					// TODO: R9 appears to encode control codes this way -- verify against other versions
-					val[1].v = val[1].v.replace(/\x0F./g, function($$) { return String.fromCharCode($$.charCodeAt(1) - 0x20); }).replace(/\r\n/g, "\n");
+					val[1].v = val[1].v.slice(1);
 					/* falls through */
 				case 0x17: /* NUMBER17 */
 				case 0x18: /* NUMBER18 */
@ -143,14 +106,14 @@ var WK_ = /*#__PURE__*/(function() {
 						s["!ref"] = encode_range(refguess);
 						sheets[n] = s;
 						snames.push(n);
-						s = ({}/*:any*/); if(o.dense) sdata = s["!data"] = [];
+						s = (o.dense ? [] : {});
 						refguess = {s: {r:0, c:0}, e: {r:0, c:0} };
 						sidx = val[3]; n = "Sheet" + (sidx + 1);
 					}
 					if(sheetRows > 0 && val[0].r >= sheetRows) break;
 					if(o.dense) {
-						if(!sdata[val[0].r]) sdata[val[0].r] = [];
-						sdata[val[0].r][val[0].c] = val[1];
+						if(!s[val[0].r]) s[val[0].r] = [];
+						s[val[0].r][val[0].c] = val[1];
 					} else s[encode_cell(val[0])] = val[1];
 					if(refguess.e.c < val[0].c) refguess.e.c = val[0].c;
 					if(refguess.e.r < val[0].r) refguess.e.r = val[0].r;
@ -184,32 +147,25 @@ var WK_ = /*#__PURE__*/(function() {
 		if(+o.codepage >= 0) set_cp(+o.codepage);
 		if(o.type == "string") throw new Error("Cannot write WK1 to JS string");
 		var ba = buf_array();
-		if(!ws["!ref"]) throw new Error("Cannot export empty sheet to WK1");
 		var range = safe_decode_range(ws["!ref"]);
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		var cols = [];

 		write_biff_rec(ba, 0x00, write_BOF_WK1(0x0406));
 		write_biff_rec(ba, 0x06, write_RANGE(range));
 		var max_R = Math.min(range.e.r, 8191);
-		for(var C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
 		for(var R = range.s.r; R <= max_R; ++R) {
 			var rr = encode_row(R);
-			for(C = range.s.c; C <= range.e.c; ++C) {
-				var cell = dense ? (ws["!data"][R]||[])[C] : ws[cols[C] + rr];
+			for(var C = range.s.c; C <= range.e.c; ++C) {
+				if(R === range.s.r) cols[C] = encode_col(C);
+				var ref = cols[C] + rr;
+				var cell = dense ? (ws[R]||[])[C] : ws[ref];
 				if(!cell || cell.t == "z") continue;
 				/* TODO: formula records */
-				switch(cell.t) {
-				case "n":
-					if((cell.v|0)==cell.v && cell.v >= -32768 && cell.v <= 32767) write_biff_rec(ba, 0x0d, write_INTEGER(R, C, cell));
-					else write_biff_rec(ba, 0x0e, write_NUMBER(R, C, cell));
-					break;
-				case "d":
-					var dc = datenum(cell.v);
-					if((dc|0)==dc && dc >= -32768 && dc <= 32767) write_biff_rec(ba, 0x0d, write_INTEGER(R, C, {t:"n", v:dc, z:cell.z || table_fmt[14]}));
-					else write_biff_rec(ba, 0x0e, write_NUMBER(R, C, {t:"n", v:dc, z:cell.z || table_fmt[14]}));
-					break;
-				default:
+				if(cell.t == "n") {
+					if((cell.v|0)==cell.v && cell.v >= -32768 && cell.v <= 32767) write_biff_rec(ba, 0x0d, write_INTEGER(R, C, cell.v));
+					else write_biff_rec(ba, 0x0e, write_NUMBER(R, C, cell.v));
+				} else {
 					var str = format_cell(cell);
 					write_biff_rec(ba, 0x0F, write_LABEL(R, C, str.slice(0, 239)));
 				}
@ -235,7 +191,7 @@ var WK_ = /*#__PURE__*/(function() {
 			var ws = wb.Sheets[wb.SheetNames[i]];
 			if(!ws || !ws["!ref"]) continue;
 			var range = safe_decode_range(ws["!ref"]);
-			var dense = ws["!data"] != null;
+			var dense = Array.isArray(ws);
 			var cols = [];
 			var max_R = Math.min(range.e.r, 8191);
 			for(var R = range.s.r; R <= max_R; ++R) {
@ -243,7 +199,7 @@ var WK_ = /*#__PURE__*/(function() {
 				for(var C = range.s.c; C <= range.e.c; ++C) {
 					if(R === range.s.r) cols[C] = encode_col(C);
 					var ref = cols[C] + rr;
-					var cell = dense ? (ws["!data"][R]||[])[C] : ws[ref];
+					var cell = dense ? (ws[R]||[])[C] : ws[ref];
 					if(!cell || cell.t == "z") continue;
 					/* TODO: FORMULA19 NUMBER18 records */
 					if(cell.t == "n") {
@ -333,9 +289,6 @@ var WK_ = /*#__PURE__*/(function() {
 			o[3] = blob.read_shift(1);
 			o[0].r = blob.read_shift(2);
 			blob.l+=2;
-		} else if(opts.works) { // TODO: verify with more complex works3-4 examples
-			o[0].c = blob.read_shift(2); o[0].r = blob.read_shift(2);
-			o[2] = blob.read_shift(2);
 		} else {
 			o[2] = blob.read_shift(1);
 			o[0].c = blob.read_shift(2); o[0].r = blob.read_shift(2);
@ -343,18 +296,11 @@ var WK_ = /*#__PURE__*/(function() {
 		return o;
 	}

-	function get_wk1_fmt(cell)/*:number*/ {
-		/* TODO: some fuzzy matching on the number format */
-		if(cell.z && fmt_is_date(cell.z)) {
-			return 0xf0 | (LOTUS_DATE_FMTS.indexOf(cell.z) + 1 || 2);
-		}
-		return 0xFF;
-	}
 	function parse_LABEL(blob, length, opts) {
 		var tgt = blob.l + length;
 		var o = parse_cell(blob, length, opts);
 		o[1].t = 's';
-		if((opts.vers & 0xFFFE) == 0x5120) { // WQ1 / WQ2
+		if(opts.vers == 0x5120) {
 			blob.l++;
 			var len = blob.read_shift(1);
 			o[1].v = blob.read_shift(len, 'utf8');
@ -378,30 +324,18 @@ var WK_ = /*#__PURE__*/(function() {
 		o.write_shift(1, 0);
 		return o;
 	}
-	function parse_STRING(blob, length, opts) {
-		var tgt = blob.l + length;
-		var o = parse_cell(blob, length, opts);
-		o[1].t = 's';
-		if(opts.vers == 0x5120) {
-			var len = blob.read_shift(1);
-			o[1].v = blob.read_shift(len, 'utf8');
-			return o;
-		}
-		o[1].v = blob.read_shift(tgt - blob.l, 'cstr');
-		return o;
-	}

 	function parse_INTEGER(blob, length, opts) {
 		var o = parse_cell(blob, length, opts);
 		o[1].v = blob.read_shift(2, 'i');
 		return o;
 	}
-	function write_INTEGER(R, C, cell) {
+	function write_INTEGER(R, C, v) {
 		var o = new_buf(7);
-		o.write_shift(1, get_wk1_fmt(cell));
+		o.write_shift(1, 0xFF);
 		o.write_shift(2, C);
 		o.write_shift(2, R);
-		o.write_shift(2, cell.v, 'i');
+		o.write_shift(2, v, 'i');
 		return o;
 	}

@ -410,12 +344,12 @@ var WK_ = /*#__PURE__*/(function() {
 		o[1].v = blob.read_shift(8, 'f');
 		return o;
 	}
-	function write_NUMBER(R, C, cell) {
+	function write_NUMBER(R, C, v) {
 		var o = new_buf(13);
-		o.write_shift(1, get_wk1_fmt(cell));
+		o.write_shift(1, 0xFF);
 		o.write_shift(2, C);
 		o.write_shift(2, R);
-		o.write_shift(8, cell.v, 'f');
+		o.write_shift(8, v, 'f');
 		return o;
 	}

@ -445,88 +379,15 @@ var WK_ = /*#__PURE__*/(function() {
 	]; */
 	/* TODO: flesh out */
 	var FuncTab = {
-		0x1F: ["NA", 0],
-		// 0x20: ["ERR", 0],
-		0x21: ["ABS", 1],
-		0x22: ["TRUNC", 1],
-		0x23: ["SQRT", 1],
-		0x24: ["LOG", 1],
-		0x25: ["LN", 1],
-		0x26: ["PI", 0],
-		0x27: ["SIN", 1],
-		0x28: ["COS", 1],
-		0x29: ["TAN", 1],
-		0x2A: ["ATAN2", 2],
-		0x2B: ["ATAN", 1],
-		0x2C: ["ASIN", 1],
-		0x2D: ["ACOS", 1],
-		0x2E: ["EXP", 1],
-		0x2F: ["MOD", 2],
-		// 0x30
-		0x31: ["ISNA", 1],
-		0x32: ["ISERR", 1],
 		0x33: ["FALSE", 0],
 		0x34: ["TRUE", 0],
-		0x35: ["RAND", 0],
-		0x36: ["DATE", 3],
-		// 0x37 NOW
-		// 0x38 PMT
-		// 0x39 PV
-		// 0x3A FV
-		// 0x3B IF
-		// 0x3C DAY
-		// 0x3D MONTH
-		// 0x3E YEAR
-		0x3F: ["ROUND", 2],
-		0x40: ["TIME", 3],
-		// 0x41 HOUR
-		// 0x42 MINUTE
-		// 0x43 SECOND
-		0x44: ["ISNUMBER", 1],
-		0x45: ["ISTEXT", 1],
 		0x46: ["LEN", 1],
-		0x47: ["VALUE", 1],
-		// 0x48: ["FIXED", ?? 1],
-		0x49: ["MID", 3],
-		0x4A: ["CHAR", 1],
-		// 0x4B
-		// 0x4C FIND
-		// 0x4D DATEVALUE
-		// 0x4E TIMEVALUE
-		// 0x4F CELL
 		0x50: ["SUM", 69],
 		0x51: ["AVERAGEA", 69],
 		0x52: ["COUNTA", 69],
 		0x53: ["MINA", 69],
 		0x54: ["MAXA", 69],
-		// 0x55 VLOOKUP
-		// 0x56 NPV
-		// 0x57 VAR
-		// 0x58 STD
-		// 0x59 IRR
-		// 0x5A HLOOKUP
-		// 0x5B DSUM
-		// 0x5C DAVERAGE
-		// 0x5D DCOUNTA
-		// 0x5E DMIN
-		// 0x5F DMAX
-		// 0x60 DVARP
-		// 0x61 DSTDEVP
-		// 0x62 INDEX
-		// 0x63 COLS
-		// 0x64 ROWS
-		// 0x65 REPEAT
-		0x66: ["UPPER", 1],
-		0x67: ["LOWER", 1],
-		// 0x68 LEFT
-		// 0x69 RIGHT
-		// 0x6A REPLACE
-		0x6B: ["PROPER", 1],
-		// 0x6C CELL
-		0x6D: ["TRIM", 1],
-		// 0x6E CLEAN
 		0x6F: ["T", 1]
-		// 0x70 V
 	};
 	var BinOpTab = [
 		  "",   "",   "",   "",   "",   "",   "",   "", // eslint-disable-line no-mixed-spaces-and-tabs
@ -711,8 +572,8 @@ var WK_ = /*#__PURE__*/(function() {
 	}

 	function parse_FORMULA_28(blob, length) {
-		var o = parse_NUMBER_27(blob, 12);
-		blob.l += length - 12; /* TODO: formula */
+		var o = parse_NUMBER_27(blob, 14);
+		blob.l += length - 10; /* TODO: formula */
 		return o;
 	}

@ -763,418 +624,197 @@ var WK_ = /*#__PURE__*/(function() {
 	}

 	var WK1Enum = {
-		0x0000: { n:"BOF", f:parseuint16 },
-		0x0001: { n:"EOF" },
-		0x0002: { n:"CALCMODE" },
-		0x0003: { n:"CALCORDER" },
-		0x0004: { n:"SPLIT" },
-		0x0005: { n:"SYNC" },
-		0x0006: { n:"RANGE", f:parse_RANGE },
-		0x0007: { n:"WINDOW1" },
-		0x0008: { n:"COLW1" },
-		0x0009: { n:"WINTWO" },
-		0x000A: { n:"COLW2" },
-		0x000B: { n:"NAME" },
-		0x000C: { n:"BLANK" },
-		0x000D: { n:"INTEGER", f:parse_INTEGER },
-		0x000E: { n:"NUMBER", f:parse_NUMBER },
-		0x000F: { n:"LABEL", f:parse_LABEL },
-		0x0010: { n:"FORMULA", f:parse_FORMULA },
-		0x0018: { n:"TABLE" },
-		0x0019: { n:"ORANGE" },
-		0x001A: { n:"PRANGE" },
-		0x001B: { n:"SRANGE" },
-		0x001C: { n:"FRANGE" },
-		0x001D: { n:"KRANGE1" },
-		0x0020: { n:"HRANGE" },
-		0x0023: { n:"KRANGE2" },
-		0x0024: { n:"PROTEC" },
-		0x0025: { n:"FOOTER" },
-		0x0026: { n:"HEADER" },
-		0x0027: { n:"SETUP" },
-		0x0028: { n:"MARGINS" },
-		0x0029: { n:"LABELFMT" },
-		0x002A: { n:"TITLES" },
-		0x002B: { n:"SHEETJS" },
-		0x002D: { n:"GRAPH" },
-		0x002E: { n:"NGRAPH" },
-		0x002F: { n:"CALCCOUNT" },
-		0x0030: { n:"UNFORMATTED" },
-		0x0031: { n:"CURSORW12" },
-		0x0032: { n:"WINDOW" },
-		0x0033: { n:"STRING", f:parse_STRING },
-		0x0037: { n:"PASSWORD" },
-		0x0038: { n:"LOCKED" },
-		0x003C: { n:"QUERY" },
-		0x003D: { n:"QUERYNAME" },
-		0x003E: { n:"PRINT" },
-		0x003F: { n:"PRINTNAME" },
-		0x0040: { n:"GRAPH2" },
-		0x0041: { n:"GRAPHNAME" },
-		0x0042: { n:"ZOOM" },
-		0x0043: { n:"SYMSPLIT" },
-		0x0044: { n:"NSROWS" },
-		0x0045: { n:"NSCOLS" },
-		0x0046: { n:"RULER" },
-		0x0047: { n:"NNAME" },
-		0x0048: { n:"ACOMM" },
-		0x0049: { n:"AMACRO" },
-		0x004A: { n:"PARSE" },
-		// 0x0064
-		0x0066: { n:"PRANGES??" },
-		0x0067: { n:"RRANGES??" },
-		0x0068: { n:"FNAME??" },
-		0x0069: { n:"MRANGES??" },
-		// 0x0096
-		// 0x0099
-		// 0x009A
-		// 0x009B
-		// 0x009C
-		// 0x00C0
-		// 0x00C7
-		// 0x00C9
-		0x00CC: { n:"SHEETNAMECS", f:parse_SHEETNAMECS },
-		// 0x00CD
-		0x00DE: { n:"SHEETNAMELP", f:parse_SHEETNAMELP },
-		0x00FF: { n:"BOF", f:parseuint16 },
-		0x5402: { n:"WKSNF", f:parseuint16 },
-		0xFFFF: { n:"" }
+		/*::[*/0x0000/*::]*/: { n:"BOF", f:parseuint16 },
+		/*::[*/0x0001/*::]*/: { n:"EOF" },
+		/*::[*/0x0002/*::]*/: { n:"CALCMODE" },
+		/*::[*/0x0003/*::]*/: { n:"CALCORDER" },
+		/*::[*/0x0004/*::]*/: { n:"SPLIT" },
+		/*::[*/0x0005/*::]*/: { n:"SYNC" },
+		/*::[*/0x0006/*::]*/: { n:"RANGE", f:parse_RANGE },
+		/*::[*/0x0007/*::]*/: { n:"WINDOW1" },
+		/*::[*/0x0008/*::]*/: { n:"COLW1" },
+		/*::[*/0x0009/*::]*/: { n:"WINTWO" },
+		/*::[*/0x000A/*::]*/: { n:"COLW2" },
+		/*::[*/0x000B/*::]*/: { n:"NAME" },
+		/*::[*/0x000C/*::]*/: { n:"BLANK" },
+		/*::[*/0x000D/*::]*/: { n:"INTEGER", f:parse_INTEGER },
+		/*::[*/0x000E/*::]*/: { n:"NUMBER", f:parse_NUMBER },
+		/*::[*/0x000F/*::]*/: { n:"LABEL", f:parse_LABEL },
+		/*::[*/0x0010/*::]*/: { n:"FORMULA", f:parse_FORMULA },
+		/*::[*/0x0018/*::]*/: { n:"TABLE" },
+		/*::[*/0x0019/*::]*/: { n:"ORANGE" },
+		/*::[*/0x001A/*::]*/: { n:"PRANGE" },
+		/*::[*/0x001B/*::]*/: { n:"SRANGE" },
+		/*::[*/0x001C/*::]*/: { n:"FRANGE" },
+		/*::[*/0x001D/*::]*/: { n:"KRANGE1" },
+		/*::[*/0x0020/*::]*/: { n:"HRANGE" },
+		/*::[*/0x0023/*::]*/: { n:"KRANGE2" },
+		/*::[*/0x0024/*::]*/: { n:"PROTEC" },
+		/*::[*/0x0025/*::]*/: { n:"FOOTER" },
+		/*::[*/0x0026/*::]*/: { n:"HEADER" },
+		/*::[*/0x0027/*::]*/: { n:"SETUP" },
+		/*::[*/0x0028/*::]*/: { n:"MARGINS" },
+		/*::[*/0x0029/*::]*/: { n:"LABELFMT" },
+		/*::[*/0x002A/*::]*/: { n:"TITLES" },
+		/*::[*/0x002B/*::]*/: { n:"SHEETJS" },
+		/*::[*/0x002D/*::]*/: { n:"GRAPH" },
+		/*::[*/0x002E/*::]*/: { n:"NGRAPH" },
+		/*::[*/0x002F/*::]*/: { n:"CALCCOUNT" },
+		/*::[*/0x0030/*::]*/: { n:"UNFORMATTED" },
+		/*::[*/0x0031/*::]*/: { n:"CURSORW12" },
+		/*::[*/0x0032/*::]*/: { n:"WINDOW" },
+		/*::[*/0x0033/*::]*/: { n:"STRING", f:parse_LABEL },
+		/*::[*/0x0037/*::]*/: { n:"PASSWORD" },
+		/*::[*/0x0038/*::]*/: { n:"LOCKED" },
+		/*::[*/0x003C/*::]*/: { n:"QUERY" },
+		/*::[*/0x003D/*::]*/: { n:"QUERYNAME" },
+		/*::[*/0x003E/*::]*/: { n:"PRINT" },
+		/*::[*/0x003F/*::]*/: { n:"PRINTNAME" },
+		/*::[*/0x0040/*::]*/: { n:"GRAPH2" },
+		/*::[*/0x0041/*::]*/: { n:"GRAPHNAME" },
+		/*::[*/0x0042/*::]*/: { n:"ZOOM" },
+		/*::[*/0x0043/*::]*/: { n:"SYMSPLIT" },
+		/*::[*/0x0044/*::]*/: { n:"NSROWS" },
+		/*::[*/0x0045/*::]*/: { n:"NSCOLS" },
+		/*::[*/0x0046/*::]*/: { n:"RULER" },
+		/*::[*/0x0047/*::]*/: { n:"NNAME" },
+		/*::[*/0x0048/*::]*/: { n:"ACOMM" },
+		/*::[*/0x0049/*::]*/: { n:"AMACRO" },
+		/*::[*/0x004A/*::]*/: { n:"PARSE" },
+		/*::[*/0x0066/*::]*/: { n:"PRANGES??" },
+		/*::[*/0x0067/*::]*/: { n:"RRANGES??" },
+		/*::[*/0x0068/*::]*/: { n:"FNAME??" },
+		/*::[*/0x0069/*::]*/: { n:"MRANGES??" },
+		/*::[*/0x00CC/*::]*/: { n:"SHEETNAMECS", f:parse_SHEETNAMECS },
+		/*::[*/0x00DE/*::]*/: { n:"SHEETNAMELP", f:parse_SHEETNAMELP },
+		/*::[*/0xFFFF/*::]*/: { n:"" }
 	};

 	var WK3Enum = {
-		0x0000: { n:"BOF" },
-		0x0001: { n:"EOF" },
-		0x0002: { n:"PASSWORD" },
-		0x0003: { n:"CALCSET" },
-		0x0004: { n:"WINDOWSET" },
-		0x0005: { n:"SHEETCELLPTR" },
-		0x0006: { n:"SHEETLAYOUT" },
-		0x0007: { n:"COLUMNWIDTH" },
-		0x0008: { n:"HIDDENCOLUMN" },
-		0x0009: { n:"USERRANGE" },
-		0x000A: { n:"SYSTEMRANGE" },
-		0x000B: { n:"ZEROFORCE" },
-		0x000C: { n:"SORTKEYDIR" },
-		0x000D: { n:"FILESEAL" },
-		0x000E: { n:"DATAFILLNUMS" },
-		0x000F: { n:"PRINTMAIN" },
-		0x0010: { n:"PRINTSTRING" },
-		0x0011: { n:"GRAPHMAIN" },
-		0x0012: { n:"GRAPHSTRING" },
-		0x0013: { n:"??" },
-		0x0014: { n:"ERRCELL" },
-		0x0015: { n:"NACELL" },
-		0x0016: { n:"LABEL16", f:parse_LABEL_16},
-		0x0017: { n:"NUMBER17", f:parse_NUMBER_17 },
-		0x0018: { n:"NUMBER18", f:parse_NUMBER_18 },
-		0x0019: { n:"FORMULA19", f:parse_FORMULA_19},
-		0x001A: { n:"FORMULA1A" },
-		0x001B: { n:"XFORMAT", f:parse_XFORMAT },
-		0x001C: { n:"DTLABELMISC" },
-		0x001D: { n:"DTLABELCELL" },
-		0x001E: { n:"GRAPHWINDOW" },
-		0x001F: { n:"CPA" },
-		0x0020: { n:"LPLAUTO" },
-		0x0021: { n:"QUERY" },
-		0x0022: { n:"HIDDENSHEET" },
-		0x0023: { n:"??" },
-		0x0025: { n:"NUMBER25", f:parse_NUMBER_25 },
-		0x0026: { n:"??" },
-		0x0027: { n:"NUMBER27", f:parse_NUMBER_27 },
-		0x0028: { n:"FORMULA28", f:parse_FORMULA_28 },
-		0x008E: { n:"??" },
-		0x0093: { n:"??" },
-		0x0096: { n:"??" },
-		0x0097: { n:"??" },
-		0x0098: { n:"??" },
-		0x0099: { n:"??" },
-		0x009A: { n:"??" },
-		0x009B: { n:"??" },
-		0x009C: { n:"??" },
-		0x00A3: { n:"??" },
-		0x00AE: { n:"??" },
-		0x00AF: { n:"??" },
-		0x00B0: { n:"??" },
-		0x00B1: { n:"??" },
-		0x00B8: { n:"??" },
-		0x00B9: { n:"??" },
-		0x00BA: { n:"??" },
-		0x00BB: { n:"??" },
-		0x00BC: { n:"??" },
-		0x00C3: { n:"??" },
-		0x00C9: { n:"??" },
-		0x00CC: { n:"SHEETNAMECS", f:parse_SHEETNAMECS },
-		0x00CD: { n:"??" },
-		0x00CE: { n:"??" },
-		0x00CF: { n:"??" },
-		0x00D0: { n:"??" },
-		0x0100: { n:"??" },
-		0x0103: { n:"??" },
-		0x0104: { n:"??" },
-		0x0105: { n:"??" },
-		0x0106: { n:"??" },
-		0x0107: { n:"??" },
-		0x0109: { n:"??" },
-		0x010A: { n:"??" },
-		0x010B: { n:"??" },
-		0x010C: { n:"??" },
-		0x010E: { n:"??" },
-		0x010F: { n:"??" },
-		0x0180: { n:"??" },
-		0x0185: { n:"??" },
-		0x0186: { n:"??" },
-		0x0189: { n:"??" },
-		0x018C: { n:"??" },
-		0x0200: { n:"??" },
-		0x0202: { n:"??" },
-		0x0201: { n:"??" },
-		0x0204: { n:"??" },
-		0x0205: { n:"??" },
-		0x0280: { n:"??" },
-		0x0281: { n:"??" },
-		0x0282: { n:"??" },
-		0x0283: { n:"??" },
-		0x0284: { n:"??" },
-		0x0285: { n:"??" },
-		0x0286: { n:"??" },
-		0x0287: { n:"??" },
-		0x0288: { n:"??" },
-		0x0292: { n:"??" },
-		0x0293: { n:"??" },
-		0x0294: { n:"??" },
-		0x0295: { n:"??" },
-		0x0296: { n:"??" },
-		0x0299: { n:"??" },
-		0x029A: { n:"??" },
-		0x0300: { n:"??" },
-		0x0304: { n:"??" },
-		0x0601: { n:"SHEETINFOQP", f:parse_SHEETINFOQP },
-		0x0640: { n:"??" },
-		0x0642: { n:"??" },
-		0x0701: { n:"??" },
-		0x0702: { n:"??" },
-		0x0703: { n:"??" },
-		0x0704: { n:"??" },
-		0x0780: { n:"??" },
-		0x0800: { n:"??" },
-		0x0801: { n:"??" },
-		0x0804: { n:"??" },
-		0x0A80: { n:"??" },
-		0x2AF6: { n:"??" },
-		0x3231: { n:"??" },
-		0x6E49: { n:"??" },
-		0x6F44: { n:"??" },
-		0xFFFF: { n:"" }
+		/*::[*/0x0000/*::]*/: { n:"BOF" },
+		/*::[*/0x0001/*::]*/: { n:"EOF" },
+		/*::[*/0x0002/*::]*/: { n:"PASSWORD" },
+		/*::[*/0x0003/*::]*/: { n:"CALCSET" },
+		/*::[*/0x0004/*::]*/: { n:"WINDOWSET" },
+		/*::[*/0x0005/*::]*/: { n:"SHEETCELLPTR" },
+		/*::[*/0x0006/*::]*/: { n:"SHEETLAYOUT" },
+		/*::[*/0x0007/*::]*/: { n:"COLUMNWIDTH" },
+		/*::[*/0x0008/*::]*/: { n:"HIDDENCOLUMN" },
+		/*::[*/0x0009/*::]*/: { n:"USERRANGE" },
+		/*::[*/0x000A/*::]*/: { n:"SYSTEMRANGE" },
+		/*::[*/0x000B/*::]*/: { n:"ZEROFORCE" },
+		/*::[*/0x000C/*::]*/: { n:"SORTKEYDIR" },
+		/*::[*/0x000D/*::]*/: { n:"FILESEAL" },
+		/*::[*/0x000E/*::]*/: { n:"DATAFILLNUMS" },
+		/*::[*/0x000F/*::]*/: { n:"PRINTMAIN" },
+		/*::[*/0x0010/*::]*/: { n:"PRINTSTRING" },
+		/*::[*/0x0011/*::]*/: { n:"GRAPHMAIN" },
+		/*::[*/0x0012/*::]*/: { n:"GRAPHSTRING" },
+		/*::[*/0x0013/*::]*/: { n:"??" },
+		/*::[*/0x0014/*::]*/: { n:"ERRCELL" },
+		/*::[*/0x0015/*::]*/: { n:"NACELL" },
+		/*::[*/0x0016/*::]*/: { n:"LABEL16", f:parse_LABEL_16},
+		/*::[*/0x0017/*::]*/: { n:"NUMBER17", f:parse_NUMBER_17 },
+		/*::[*/0x0018/*::]*/: { n:"NUMBER18", f:parse_NUMBER_18 },
+		/*::[*/0x0019/*::]*/: { n:"FORMULA19", f:parse_FORMULA_19},
+		/*::[*/0x001A/*::]*/: { n:"FORMULA1A" },
+		/*::[*/0x001B/*::]*/: { n:"XFORMAT", f:parse_XFORMAT },
+		/*::[*/0x001C/*::]*/: { n:"DTLABELMISC" },
+		/*::[*/0x001D/*::]*/: { n:"DTLABELCELL" },
+		/*::[*/0x001E/*::]*/: { n:"GRAPHWINDOW" },
+		/*::[*/0x001F/*::]*/: { n:"CPA" },
+		/*::[*/0x0020/*::]*/: { n:"LPLAUTO" },
+		/*::[*/0x0021/*::]*/: { n:"QUERY" },
+		/*::[*/0x0022/*::]*/: { n:"HIDDENSHEET" },
+		/*::[*/0x0023/*::]*/: { n:"??" },
+		/*::[*/0x0025/*::]*/: { n:"NUMBER25", f:parse_NUMBER_25 },
+		/*::[*/0x0026/*::]*/: { n:"??" },
+		/*::[*/0x0027/*::]*/: { n:"NUMBER27", f:parse_NUMBER_27 },
+		/*::[*/0x0028/*::]*/: { n:"FORMULA28", f:parse_FORMULA_28 },
+		/*::[*/0x008E/*::]*/: { n:"??" },
+		/*::[*/0x0093/*::]*/: { n:"??" },
+		/*::[*/0x0096/*::]*/: { n:"??" },
+		/*::[*/0x0097/*::]*/: { n:"??" },
+		/*::[*/0x0098/*::]*/: { n:"??" },
+		/*::[*/0x0099/*::]*/: { n:"??" },
+		/*::[*/0x009A/*::]*/: { n:"??" },
+		/*::[*/0x009B/*::]*/: { n:"??" },
+		/*::[*/0x009C/*::]*/: { n:"??" },
+		/*::[*/0x00A3/*::]*/: { n:"??" },
+		/*::[*/0x00AE/*::]*/: { n:"??" },
+		/*::[*/0x00AF/*::]*/: { n:"??" },
+		/*::[*/0x00B0/*::]*/: { n:"??" },
+		/*::[*/0x00B1/*::]*/: { n:"??" },
+		/*::[*/0x00B8/*::]*/: { n:"??" },
+		/*::[*/0x00B9/*::]*/: { n:"??" },
+		/*::[*/0x00BA/*::]*/: { n:"??" },
+		/*::[*/0x00BB/*::]*/: { n:"??" },
+		/*::[*/0x00BC/*::]*/: { n:"??" },
+		/*::[*/0x00C3/*::]*/: { n:"??" },
+		/*::[*/0x00C9/*::]*/: { n:"??" },
+		/*::[*/0x00CC/*::]*/: { n:"SHEETNAMECS", f:parse_SHEETNAMECS },
+		/*::[*/0x00CD/*::]*/: { n:"??" },
+		/*::[*/0x00CE/*::]*/: { n:"??" },
+		/*::[*/0x00CF/*::]*/: { n:"??" },
+		/*::[*/0x00D0/*::]*/: { n:"??" },
+		/*::[*/0x0100/*::]*/: { n:"??" },
+		/*::[*/0x0103/*::]*/: { n:"??" },
+		/*::[*/0x0104/*::]*/: { n:"??" },
+		/*::[*/0x0105/*::]*/: { n:"??" },
+		/*::[*/0x0106/*::]*/: { n:"??" },
+		/*::[*/0x0107/*::]*/: { n:"??" },
+		/*::[*/0x0109/*::]*/: { n:"??" },
+		/*::[*/0x010A/*::]*/: { n:"??" },
+		/*::[*/0x010B/*::]*/: { n:"??" },
+		/*::[*/0x010C/*::]*/: { n:"??" },
+		/*::[*/0x010E/*::]*/: { n:"??" },
+		/*::[*/0x010F/*::]*/: { n:"??" },
+		/*::[*/0x0180/*::]*/: { n:"??" },
+		/*::[*/0x0185/*::]*/: { n:"??" },
+		/*::[*/0x0186/*::]*/: { n:"??" },
+		/*::[*/0x0189/*::]*/: { n:"??" },
+		/*::[*/0x018C/*::]*/: { n:"??" },
+		/*::[*/0x0200/*::]*/: { n:"??" },
+		/*::[*/0x0202/*::]*/: { n:"??" },
+		/*::[*/0x0201/*::]*/: { n:"??" },
+		/*::[*/0x0204/*::]*/: { n:"??" },
+		/*::[*/0x0205/*::]*/: { n:"??" },
+		/*::[*/0x0280/*::]*/: { n:"??" },
+		/*::[*/0x0281/*::]*/: { n:"??" },
+		/*::[*/0x0282/*::]*/: { n:"??" },
+		/*::[*/0x0283/*::]*/: { n:"??" },
+		/*::[*/0x0284/*::]*/: { n:"??" },
+		/*::[*/0x0285/*::]*/: { n:"??" },
+		/*::[*/0x0286/*::]*/: { n:"??" },
+		/*::[*/0x0287/*::]*/: { n:"??" },
+		/*::[*/0x0288/*::]*/: { n:"??" },
+		/*::[*/0x0292/*::]*/: { n:"??" },
+		/*::[*/0x0293/*::]*/: { n:"??" },
+		/*::[*/0x0294/*::]*/: { n:"??" },
+		/*::[*/0x0295/*::]*/: { n:"??" },
+		/*::[*/0x0296/*::]*/: { n:"??" },
+		/*::[*/0x0299/*::]*/: { n:"??" },
+		/*::[*/0x029A/*::]*/: { n:"??" },
+		/*::[*/0x0300/*::]*/: { n:"??" },
+		/*::[*/0x0304/*::]*/: { n:"??" },
+		/*::[*/0x0601/*::]*/: { n:"SHEETINFOQP", f:parse_SHEETINFOQP },
+		/*::[*/0x0640/*::]*/: { n:"??" },
+		/*::[*/0x0642/*::]*/: { n:"??" },
+		/*::[*/0x0701/*::]*/: { n:"??" },
+		/*::[*/0x0702/*::]*/: { n:"??" },
+		/*::[*/0x0703/*::]*/: { n:"??" },
+		/*::[*/0x0704/*::]*/: { n:"??" },
+		/*::[*/0x0780/*::]*/: { n:"??" },
+		/*::[*/0x0800/*::]*/: { n:"??" },
+		/*::[*/0x0801/*::]*/: { n:"??" },
+		/*::[*/0x0804/*::]*/: { n:"??" },
+		/*::[*/0x0A80/*::]*/: { n:"??" },
+		/*::[*/0x2AF6/*::]*/: { n:"??" },
+		/*::[*/0x3231/*::]*/: { n:"??" },
+		/*::[*/0x6E49/*::]*/: { n:"??" },
+		/*::[*/0x6F44/*::]*/: { n:"??" },
+		/*::[*/0xFFFF/*::]*/: { n:"" }
 	};
-
-	/* TODO: fill out and verify this table across QP versions */
-	var QPWNFTable = {
-		0x05: "dd-mmm-yy",
-		0x06: "dd-mmm",
-		0x07: "mmm-yy",
-		0x08: "mm/dd/yy", // Long Date Intl
-		0x0A: "hh:mm:ss AM/PM",
-		0x0B: "hh:mm AM/PM",
-		0x0E: "dd-mmm-yyyy",
-		0x0F: "mmm-yyyy",
-
-		/* It is suspected that the the low nybble specifies decimal places */
-		0x0022: "0.00",
-		0x0032: "0.00;[Red]0.00",
-		0x0042: "0.00;\(0.00\)",
-		0x0052: "0.00;[Red]\(0.00\)",
-		0x00A2: '"$"#,##0.00;\\("$"#,##0.00\\)',
-		0x0120: '0%',
-		0x0130: '0E+00',
-		0x0140: '# ?/?'
-	};
-
-	function parse_qpw_str(p) {
-		var cch = p.read_shift(2);
-		var flags = p.read_shift(1);
-		/* TODO: find examples with nonzero flags */
-		if(flags != 0) throw "unsupported QPW string type " + flags.toString(16);
-		return p.read_shift(cch, "sbcs-cont");
-	}
-
-	/* QPW uses a different set of record types */
-	function qpw_to_workbook_buf(d, opts)/*:Workbook*/ {
-		prep_blob(d, 0);
-		var o = opts || {};
-		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var s/*:Worksheet*/ = ({}/*:any*/); if(o.dense) s["!data"] = [];
-		var SST = [], sname = "", formulae = [];
-		var range = {s:{r:-1,c:-1}, e:{r:-1,c:-1}};
-		var cnt = 0, type = 0, C = 0, R = 0;
-		var wb = { SheetNames: [], Sheets: {} };
-		var FMTS = [];
-		outer: while(d.l < d.length) {
-			var RT = d.read_shift(2), length = d.read_shift(2);
-			var p = d.slice(d.l, d.l + length);
-			prep_blob(p, 0);
-			switch(RT) {
-				case 0x01: /* BOF */
-					if(p.read_shift(4) != 0x39575051) throw "Bad QPW9 BOF!";
-					break;
-				case 0x02: /* EOF */ break outer;
-
-				case 0x08: /* NF */ break; // TODO: this is tied to custom number formats
-
-				case 0x0A: /* FORMATS */ {
-					var fcnt = p.read_shift(4);
-					var step = ((p.length - p.l)/ fcnt)|0;
-					for(var ifmt = 0; ifmt < fcnt; ++ifmt) {
-						var end = p.l + step;
-						var fmt = {};
-						p.l += 2;
-						fmt.numFmtId = p.read_shift(2);
-						if(QPWNFTable[fmt.numFmtId]) fmt.z = QPWNFTable[fmt.numFmtId];
-						p.l = end;
-						FMTS.push(fmt);
-					}
-				} break;
-
-				/* TODO: The behavior here should be consistent with Numbers: QP Notebook ~ .TN.SheetArchive, QP Sheet ~ .TST.TableModelArchive */
-				case 0x0401: /* BON */ break;
-				case 0x0402: /* EON */ /* TODO: backfill missing sheets based on BON cnt */ break;
-
-				case 0x0407: { /* SST */
-					p.l += 12;
-					while(p.l < p.length) {
-						cnt = p.read_shift(2);
-						type = p.read_shift(1);
-						SST.push(p.read_shift(cnt, 'cstr'));
-					}
-				} break;
-				case 0x0408: { /* FORMULAE */
-					//p.l += 12;
-					//while(p.l < p.length) {
-					//	cnt = p.read_shift(2);
-					//	formulae.push(p.slice(p.l, p.l + cnt + 1)); p.l += cnt + 1;
-					//}
-				} break;
-
-				case 0x0601: { /* BOS */
-					var sidx = p.read_shift(2);
-					s = ({}/*:any*/); if(o.dense) s["!data"] = [];
-					range.s.c = p.read_shift(2);
-					range.e.c = p.read_shift(2);
-					range.s.r = p.read_shift(4);
-					range.e.r = p.read_shift(4);
-					p.l += 4;
-					if(p.l + 2 < p.length) {
-						cnt = p.read_shift(2);
-						type = p.read_shift(1);
-						sname = cnt == 0 ? "" : p.read_shift(cnt, 'cstr');
-					}
-					if(!sname) sname = encode_col(sidx);
-					/* TODO: backfill empty sheets */
-				} break;
-				case 0x0602: { /* EOS */
-					/* NOTE: QP valid range A1:IV1000000 */
-					if(range.s.c > 0xFF || range.s.r > 999999) break;
-					if(range.e.c < range.s.c) range.e.c = range.s.c;
-					if(range.e.r < range.s.r) range.e.r = range.s.r;
-					s["!ref"] = encode_range(range);
-					book_append_sheet(wb, s, sname); // TODO: a barrel roll
-				} break;
-
-				case 0x0A01: { /* COL (like XLS Row, modulo the layout transposition) */
-					C = p.read_shift(2);
-					if(range.e.c < C) range.e.c = C;
-					if(range.s.c > C) range.s.c = C;
-					R = p.read_shift(4);
-					if(range.s.r > R) range.s.r = R;
-					R = p.read_shift(4);
-					if(range.e.r < R) range.e.r = R;
-				} break;
-
-				case 0x0C01: { /* MulCells (like XLS MulRK, but takes advantage of common column data patterns) */
-					R = p.read_shift(4), cnt = p.read_shift(4);
-					if(range.s.r > R) range.s.r = R;
-					if(range.e.r < R + cnt - 1) range.e.r = R + cnt - 1;
-					var CC = encode_col(C);
-					while(p.l < p.length) {
-						var cell = { t: "z" };
-						var flags = p.read_shift(1), fmtidx = -1;
-						if(flags & 0x80) fmtidx = p.read_shift(2);
-						var mul = (flags & 0x40) ? p.read_shift(2) - 1: 0;
-						switch(flags & 0x1F) {
-							case 0: break;
-							case 1: break;
-							case 2: cell = { t: "n", v: p.read_shift(2) }; break;
-							case 3: cell = { t: "n", v: p.read_shift(2, 'i') }; break;
-							case 4: cell = { t: "n", v: parse_RkNumber(p) }; break;
-							case 5: cell = { t: "n", v: p.read_shift(8, 'f') }; break;
-							case 7: cell = { t: "s", v: SST[type = p.read_shift(4) - 1] }; break;
-							case 8:
-								cell = { t: "n", v: p.read_shift(8, 'f') };
-								p.l += 2; /* cell.f = formulae[p.read_shift(4)]; */ p.l += 4;
-								if(isNaN(cell.v)) cell = { t: "e", v: 0x0F }; // #VALUE!
-								break;
-							default: throw "Unrecognized QPW cell type " + (flags & 0x1F);
-						}
-						if(fmtidx != -1 && (FMTS[fmtidx - 1]||{}).z) cell.z = FMTS[fmtidx-1].z;
-						var delta = 0;
-						if(flags & 0x20) switch(flags & 0x1F) {
-							case 2: delta = p.read_shift(2); break;
-							case 3: delta = p.read_shift(2, 'i'); break;
-							case 7: delta = p.read_shift(2); break;
-							default: throw "Unsupported delta for QPW cell type " + (flags & 0x1F);
-						}
-						if(!(!o.sheetStubs && cell.t == "z")) {
-							var newcell = dup(cell);
-							if(cell.t == "n" && cell.z && fmt_is_date(cell.z) && o.cellDates) {
-								newcell.v = numdate(cell.v); newcell.t = typeof newcell.v == "number" ? 'n' : 'd';
-							}
-							if(s["!data"] != null) {
-								if(!s["!data"][R]) s["!data"][R] = [];
-								s["!data"][R][C] = newcell;
-							} else s[CC + encode_row(R)] = newcell;
-						}
-						++R; --cnt;
-						while(mul-- > 0 && cnt >= 0) {
-							if(flags & 0x20) switch(flags & 0x1F) {
-								case 2: cell = { t: "n", v: (cell.v + delta) & 0xFFFF }; break;
-								case 3: cell = { t: "n", v: (cell.v + delta) & 0xFFFF }; if(cell.v > 0x7FFF) cell.v -= 0x10000; break;
-								case 7: cell = { t: "s", v: SST[type = (type + delta) >>> 0] }; break;
-								default: throw "Cannot apply delta for QPW cell type " + (flags & 0x1F);
-							} else switch(flags & 0x1F) {
-								case 1: cell = { t: "z" }; break;
-								case 2: cell = { t: "n", v: p.read_shift(2) }; break;
-								case 7: cell = { t: "s", v: SST[type = p.read_shift(4) - 1] }; break;
-								default: throw "Cannot apply repeat for QPW cell type " + (flags & 0x1F);
-							}
-							if(fmtidx != -1);
-							if(!(!o.sheetStubs && cell.t == "z")) {
-								if(s["!data"] != null) {
-									if(!s["!data"][R]) s["!data"][R] = [];
-									s["!data"][R][C] = cell;
-								} else s[CC + encode_row(R)] = cell;
-							}
-							++R; --cnt;
-						}
-					}
-				} break;
-
-				case 0x0C02: { /* String (result of string formula expression) */
-					C = p.read_shift(2);
-					R = p.read_shift(4);
-					var str = parse_qpw_str(p);
-					/* TODO: QP10 record has an additional unknown character after the string */
-					if(s["!data"] != null) {
-						if(!s["!data"][R]) s["!data"][R] = [];
-						s["!data"][R][C] = { t:"s", v:str };
-					} else s[encode_col(C) + encode_row(R)] = { t:"s", v:str };
-				} break;
-
-				default: break;
-			}
-			d.l += length;
-		}
-		return wb;
-	}
-
 	return {
 		sheet_to_wk1: sheet_to_wk1,
 		book_to_wk3: book_to_wk3,
--- a/bits/42_sstxml.js
+++ b/bits/42_sstxml.js
@ -4,7 +4,7 @@ function parse_rpr(rpr) {
 	var pass = false;
 	if(m) for(;i!=m.length; ++i) {
 		var y = parsexmltag(m[i]);
-		switch(y[0].replace(/<\w*:/g,"<")) {
+		switch(y[0].replace(/\w*:/g,"")) {
 			/* 18.8.12 condense CT_BooleanProperty */
 			/* ** not required . */
 			case '<condense': break;
@ -107,14 +107,15 @@ function parse_rpr(rpr) {
 }

 var parse_rs = /*#__PURE__*/(function() {
+	var tregex = matchtag("t"), rpregex = matchtag("rPr");
 	/* 18.4.4 r CT_RElt */
 	function parse_r(r) {
 		/* 18.4.12 t ST_Xstring */
-		var t = str_match_xml_ns(r, "t")/*, cp = 65001*/;
+		var t = r.match(tregex)/*, cp = 65001*/;
 		if(!t) return {t:"s", v:""};

 		var o/*:Cell*/ = ({t:'s', v:unescapexml(t[1])}/*:any*/);
-		var rpr = str_match_xml_ns(r, "rPr");
+		var rpr = r.match(rpregex);
 		if(rpr) o.s = parse_rpr(rpr[1]);
 		return o;
 	}
@ -167,7 +168,8 @@ var rs_to_html = /*#__PURE__*/(function parse_rs_factory() {
 })();

 /* 18.4.8 si CT_Rst */
-var sitregex = /<(?:\w+:)?t\b[^<>]*>([^<]*)<\/(?:\w+:)?t>/g, sirregex = /<(?:\w+:)?r\b[^<>]*>/;
+var sitregex = /<(?:\w+:)?t[^>]*>([^<]*)<\/(?:\w+:)?t>/g, sirregex = /<(?:\w+:)?r>/;
+var sirphregex = /<(?:\w+:)?rPh.*?>([\s\S]*?)<\/(?:\w+:)?rPh>/g;
 function parse_si(x, opts) {
 	var html = opts ? opts.cellHTML : true;
 	var z = {};
@ -176,14 +178,14 @@ function parse_si(x, opts) {
 	/* 18.4.12 t ST_Xstring (Plaintext String) */
 	// TODO: is whitespace actually valid here?
 	if(x.match(/^\s*<(?:\w+:)?t[^>]*>/)) {
-		z.t = unescapexml(utf8read(x.slice(x.indexOf(">")+1).split(/<\/(?:\w+:)?t>/)[0]||""), true);
+		z.t = unescapexml(utf8read(x.slice(x.indexOf(">")+1).split(/<\/(?:\w+:)?t>/)[0]||""));
 		z.r = utf8read(x);
 		if(html) z.h = escapehtml(z.t);
 	}
 	/* 18.4.4 r CT_RElt (Rich Text Run) */
 	else if((/*y = */x.match(sirregex))) {
 		z.r = utf8read(x);
-		z.t = unescapexml(utf8read((str_remove_xml_ns_g(x, "rPh").match(sitregex)||[]).join("").replace(tagregex,"")), true);
+		z.t = unescapexml(utf8read((x.replace(sirphregex, '').match(sitregex)||[]).join("").replace(tagregex,"")));
 		if(html) z.h = rs_to_html(parse_rs(z.r));
 	}
 	/* 18.4.3 phoneticPr CT_PhoneticPr (TODO: needed for Asian support) */
@ -192,20 +194,21 @@ function parse_si(x, opts) {
 }

 /* 18.4 Shared String Table */
+var sstr0 = /<(?:\w+:)?sst([^>]*)>([\s\S]*)<\/(?:\w+:)?sst>/;
 var sstr1 = /<(?:\w+:)?(?:si|sstItem)>/g;
 var sstr2 = /<\/(?:\w+:)?(?:si|sstItem)>/;
 function parse_sst_xml(data/*:string*/, opts)/*:SST*/ {
 	var s/*:SST*/ = ([]/*:any*/), ss = "";
 	if(!data) return s;
 	/* 18.4.9 sst CT_Sst */
-	var sst = str_match_xml_ns(data, "sst");
+	var sst = data.match(sstr0);
 	if(sst) {
-		ss = sst[1].replace(sstr1,"").split(sstr2);
+		ss = sst[2].replace(sstr1,"").split(sstr2);
 		for(var i = 0; i != ss.length; ++i) {
 			var o = parse_si(ss[i].trim(), opts);
 			if(o != null) s[s.length] = o;
 		}
-		sst = parsexmltag(sst[0].slice(0, sst[0].indexOf(">"))); s.Count = sst.count; s.Unique = sst.uniqueCount;
+		sst = parsexmltag(sst[1]); s.Count = sst.count; s.Unique = sst.uniqueCount;
 	}
 	return s;
 }
@ -226,7 +229,6 @@ function write_sst_xml(sst/*:SST*/, opts)/*:string*/ {
 		else {
 			sitag += "<t";
 			if(!s.t) s.t = "";
-			if(typeof s.t !== "string") s.t = String(s.t);
 			if(s.t.match(straywsregex)) sitag += ' xml:space="preserve"';
 			sitag += ">" + escapexml(s.t) + "</t>";
 		}
--- a/bits/45_rtf.js
+++ b/bits/45_rtf.js
@ -1,103 +1,76 @@
-function rtf_to_sheet(d, opts) {
-  switch (opts.type) {
-    case "base64":
-      return rtf_to_sheet_str(Base64_decode(d), opts);
-    case "binary":
-      return rtf_to_sheet_str(d, opts);
-    case "buffer":
-      return rtf_to_sheet_str(has_buf && Buffer.isBuffer(d) ? d.toString("binary") : a2s(d), opts);
-    case "array":
-      return rtf_to_sheet_str(cc2str(d), opts);
-  }
-  throw new Error("Unrecognized type " + opts.type);
-}
-function rtf_to_sheet_str(str, opts) {
-  var o = opts || {};
-  var ws = {};
-  var dense = o.dense;
-  if (dense)
-    ws["!data"] = [];
-  var rows = str_match_ng(str, "\\trowd", "\\row");
-  if (!rows)
-    throw new Error("RTF missing table");
-  var range = { s: { c: 0, r: 0 }, e: { c: 0, r: rows.length - 1 } };
-  var row = [];
-  rows.forEach(function(rowtf, R) {
-    if (dense)
-      row = ws["!data"][R] = [];
-    var rtfre = /\\[\w\-]+\b/g;
-    var last_index = 0;
-    var res;
-    var C = -1;
-    var payload = [];
-    while ((res = rtfre.exec(rowtf)) != null) {
-      var data = rowtf.slice(last_index, rtfre.lastIndex - res[0].length);
-      if (data.charCodeAt(0) == 32)
-        data = data.slice(1);
-      if (data.length)
-        payload.push(data);
-      switch (res[0]) {
-        case "\\cell":
-          ++C;
-          if (payload.length) {
-            var cell = { v: payload.join(""), t: "s" };
-            if (cell.v == "TRUE" || cell.v == "FALSE") {
-              cell.v = cell.v == "TRUE";
-              cell.t = "b";
-            } else if (!isNaN(fuzzynum(cell.v))) {
-              cell.t = "n";
-              if (o.cellText !== false)
-                cell.w = cell.v;
-              cell.v = fuzzynum(cell.v);
-            }
-            if (dense)
-              row[C] = cell;
-            else
-              ws[encode_cell({ r: R, c: C })] = cell;
-          }
-          payload = [];
-          break;
-        case "\\par":
-          payload.push("\n");
-          break;
-      }
-      last_index = rtfre.lastIndex;
-    }
-    if (C > range.e.c)
-      range.e.c = C;
-  });
-  ws["!ref"] = encode_range(range);
-  return ws;
-}
-function rtf_to_workbook(d, opts) {
-  var wb = sheet_to_workbook(rtf_to_sheet(d, opts), opts);
-  wb.bookType = "rtf";
-  return wb;
-}
-function sheet_to_rtf(ws, opts) {
-  var o = ["{\\rtf1\\ansi"];
-  if (!ws["!ref"])
-    return o[0] + "}";
-  var r = safe_decode_range(ws["!ref"]), cell;
-  var dense = ws["!data"] != null, row = [];
-  for (var R = r.s.r; R <= r.e.r; ++R) {
-    o.push("\\trowd\\trautofit1");
-    for (var C = r.s.c; C <= r.e.c; ++C)
-      o.push("\\cellx" + (C + 1));
-    o.push("\\pard\\intbl");
-    if (dense)
-      row = ws["!data"][R] || [];
-    for (C = r.s.c; C <= r.e.c; ++C) {
-      var coord = encode_cell({ r: R, c: C });
-      cell = dense ? row[C] : ws[coord];
-      if (!cell || cell.v == null && (!cell.f || cell.F)) {
-        o.push(" \\cell");
-        continue;
-      }
-      o.push(" " + (cell.w || (format_cell(cell), cell.w) || "").replace(/[\r\n]/g, "\\par "));
-      o.push("\\cell");
-    }
-    o.push("\\pard\\intbl\\row");
-  }
-  return o.join("") + "}";
-}
+var RTF = /*#__PURE__*/(function() {
+	function rtf_to_sheet(d/*:RawData*/, opts)/*:Worksheet*/ {
+		switch(opts.type) {
+			case 'base64': return rtf_to_sheet_str(Base64_decode(d), opts);
+			case 'binary': return rtf_to_sheet_str(d, opts);
+			case 'buffer': return rtf_to_sheet_str(has_buf && Buffer.isBuffer(d) ? d.toString('binary') : a2s(d), opts);
+			case 'array':  return rtf_to_sheet_str(cc2str(d), opts);
+		}
+		throw new Error("Unrecognized type " + opts.type);
+	}
+
+	/* TODO: this is a stub */
+	function rtf_to_sheet_str(str/*:string*/, opts)/*:Worksheet*/ {
+		var o = opts || {};
+		var ws/*:Worksheet*/ = o.dense ? ([]/*:any*/) : ({}/*:any*/);
+
+		var rows = str.match(/\\trowd.*?\\row\b/g);
+		if(!rows.length) throw new Error("RTF missing table");
+		var range/*:Range*/ = ({s: {c:0, r:0}, e: {c:0, r:rows.length - 1}}/*:any*/);
+		rows.forEach(function(rowtf, R) {
+			if(Array.isArray(ws)) ws[R] = [];
+			var rtfre = /\\\w+\b/g;
+			var last_index = 0;
+			var res;
+			var C = -1;
+			while((res = rtfre.exec(rowtf))) {
+				switch(res[0]) {
+					case "\\cell":
+						var data = rowtf.slice(last_index, rtfre.lastIndex - res[0].length);
+						if(data[0] == " ") data = data.slice(1);
+						++C;
+						if(data.length) {
+							// TODO: value parsing, including codepage adjustments
+							var cell = {v: data, t:"s"};
+							if(Array.isArray(ws)) ws[R][C] = cell;
+							else ws[encode_cell({r:R, c:C})] = cell;
+						}
+						break;
+				}
+				last_index = rtfre.lastIndex;
+			}
+			if(C > range.e.c) range.e.c = C;
+		});
+		ws['!ref'] = encode_range(range);
+		return ws;
+	}
+
+	function rtf_to_workbook(d/*:RawData*/, opts)/*:Workbook*/ { return sheet_to_workbook(rtf_to_sheet(d, opts), opts); }
+
+	/* TODO: this is a stub */
+	function sheet_to_rtf(ws/*:Worksheet*//*::, opts*/)/*:string*/ {
+		var o = ["{\\rtf1\\ansi"];
+		var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
+		var dense = Array.isArray(ws);
+		for(var R = r.s.r; R <= r.e.r; ++R) {
+			o.push("\\trowd\\trautofit1");
+			for(var C = r.s.c; C <= r.e.c; ++C) o.push("\\cellx" + (C+1));
+			o.push("\\pard\\intbl");
+			for(C = r.s.c; C <= r.e.c; ++C) {
+				var coord = encode_cell({r:R,c:C});
+				cell = dense ? (ws[R]||[])[C]: ws[coord];
+				if(!cell || cell.v == null && (!cell.f || cell.F)) continue;
+				o.push(" " + (cell.w || (format_cell(cell), cell.w)));
+				o.push("\\cell");
+			}
+			o.push("\\pard\\intbl\\row");
+		}
+		return o.join("") + "}";
+	}
+
+	return {
+		to_workbook: rtf_to_workbook,
+		to_sheet: rtf_to_sheet,
+		from_sheet: sheet_to_rtf
+	};
+})();
--- a/bits/47_styxml.js
+++ b/bits/47_styxml.js
@ -3,7 +3,7 @@ function parse_borders(t, styles, themes, opts) {
 	styles.Borders = [];
 	var border = {};
 	var pass = false;
-	(t.match(tagregex)||[]).forEach(function(x) {
+	(t[0].match(tagregex)||[]).forEach(function(x) {
 		var y = parsexmltag(x);
 		switch(strip_ns(y[0])) {
 			case '<borders': case '<borders>': case '</borders>': break;
@ -78,7 +78,7 @@ function parse_fills(t, styles, themes, opts) {
 	styles.Fills = [];
 	var fill = {};
 	var pass = false;
-	(t.match(tagregex)||[]).forEach(function(x) {
+	(t[0].match(tagregex)||[]).forEach(function(x) {
 		var y = parsexmltag(x);
 		switch(strip_ns(y[0])) {
 			case '<fills': case '<fills>': case '</fills>': break;
@ -144,7 +144,7 @@ function parse_fonts(t, styles, themes, opts) {
 	styles.Fonts = [];
 	var font = {};
 	var pass = false;
-	(t.match(tagregex)||[]).forEach(function(x) {
+	(t[0].match(tagregex)||[]).forEach(function(x) {
 		var y = parsexmltag(x);
 		switch(strip_ns(y[0])) {
 			case '<fonts': case '<fonts>': case '</fonts>': break;
@ -264,7 +264,7 @@ function parse_numFmts(t, styles, opts) {
 	styles.NumberFmt = [];
 	var k/*Array<number>*/ = (keys(table_fmt)/*:any*/);
 	for(var i=0; i < k.length; ++i) styles.NumberFmt[k[i]] = table_fmt[k[i]];
-	var m = t.match(tagregex);
+	var m = t[0].match(tagregex);
 	if(!m) return;
 	for(i=0; i < m.length; ++i) {
 		var y = parsexmltag(m[i]);
@ -278,7 +278,7 @@ function parse_numFmts(t, styles, opts) {
 						for(j = 0x188; j > 0x3c; --j) if(styles.NumberFmt[j] == null) break;
 						styles.NumberFmt[j] = f;
 					}
-					SSF__load(f,j);
+					SSF_load(f,j);
 				}
 			} break;
 			case '</numFmt>': break;
@ -305,13 +305,13 @@ function parse_cellXfs(t, styles, opts) {
 	styles.CellXf = [];
 	var xf;
 	var pass = false;
-	(t.match(tagregex)||[]).forEach(function(x) {
+	(t[0].match(tagregex)||[]).forEach(function(x) {
 		var y = parsexmltag(x), i = 0;
 		switch(strip_ns(y[0])) {
 			case '<cellXfs': case '<cellXfs>': case '<cellXfs/>': case '</cellXfs>': break;

 			/* 18.8.45 xf CT_Xf */
-			case '<xf': case '<xf/>': case '<xf>':
+			case '<xf': case '<xf/>':
 				xf = y;
 				delete xf[0];
 				for(i = 0; i < cellXF_uint.length; ++i) if(xf[cellXF_uint[i]])
@ -325,7 +325,7 @@ function parse_cellXfs(t, styles, opts) {
 			case '</xf>': break;

 			/* 18.8.1 alignment CT_CellAlignment */
-			case '<alignment': case '<alignment/>': case '<alignment>':
+			case '<alignment': case '<alignment/>':
 				var alignment = {};
 				if(y.vertical) alignment.vertical = y.vertical;
 				if(y.horizontal) alignment.horizontal = y.horizontal;
@ -337,12 +337,12 @@ function parse_cellXfs(t, styles, opts) {
 			case '</alignment>': break;

 			/* 18.8.33 protection CT_CellProtection */
-			case '<protection': case '<protection>':
+			case '<protection':
 				break;
 			case '</protection>': case '<protection/>': break;

 			/* note: sometimes mc:AlternateContent appears bare */
-			case '<AlternateContent': case '<AlternateContent>': pass = true; break;
+			case '<AlternateContent': pass = true; break;
 			case '</AlternateContent>': pass = false; break;

 			/* 18.2.10 extLst CT_ExtensionList ? */
@ -370,31 +370,36 @@ function write_cellXfs(cellXfs)/*:string*/ {

 /* 18.8 Styles CT_Stylesheet*/
 var parse_sty_xml= /*#__PURE__*/(function make_pstyx() {
+var numFmtRegex = /<(?:\w+:)?numFmts([^>]*)>[\S\s]*?<\/(?:\w+:)?numFmts>/;
+var cellXfRegex = /<(?:\w+:)?cellXfs([^>]*)>[\S\s]*?<\/(?:\w+:)?cellXfs>/;
+var fillsRegex = /<(?:\w+:)?fills([^>]*)>[\S\s]*?<\/(?:\w+:)?fills>/;
+var fontsRegex = /<(?:\w+:)?fonts([^>]*)>[\S\s]*?<\/(?:\w+:)?fonts>/;
+var bordersRegex = /<(?:\w+:)?borders([^>]*)>[\S\s]*?<\/(?:\w+:)?borders>/;

 return function parse_sty_xml(data, themes, opts) {
 	var styles = {};
 	if(!data) return styles;
-	data = remove_doctype(str_remove_ng(data, "<!--", "-->"));
+	data = data.replace(/<!--([\s\S]*?)-->/mg,"").replace(/<!DOCTYPE[^\[]*\[[^\]]*\]>/gm,"");
 	/* 18.8.39 styleSheet CT_Stylesheet */
 	var t;

 	/* 18.8.31 numFmts CT_NumFmts ? */
-	if((t=str_match_xml_ns(data, "numFmts"))) parse_numFmts(t[0], styles, opts);
+	if((t=data.match(numFmtRegex))) parse_numFmts(t, styles, opts);

 	/* 18.8.23 fonts CT_Fonts ? */
-	if((t=str_match_xml_ns(data, "fonts"))) parse_fonts(t[0], styles, themes, opts);
+	if((t=data.match(fontsRegex))) parse_fonts(t, styles, themes, opts);

 	/* 18.8.21 fills CT_Fills ? */
-	if((t=str_match_xml_ns(data, "fills"))) parse_fills(t[0], styles, themes, opts);
+	if((t=data.match(fillsRegex))) parse_fills(t, styles, themes, opts);

 	/* 18.8.5  borders CT_Borders ? */
-	if((t=str_match_xml_ns(data, "borders"))) parse_borders(t[0], styles, themes, opts);
+	if((t=data.match(bordersRegex))) parse_borders(t, styles, themes, opts);

 	/* 18.8.9  cellStyleXfs CT_CellStyleXfs ? */
 	/* 18.8.8  cellStyles CT_CellStyles ? */

 	/* 18.8.10 cellXfs CT_CellXfs ? */
-	if((t=str_match_xml_ns(data, "cellXfs"))) parse_cellXfs(t[0], styles, opts);
+	if((t=data.match(cellXfRegex))) parse_cellXfs(t, styles, opts);

 	/* 18.8.15 dxfs CT_Dxfs ? */
 	/* 18.8.42 tableStyles CT_TableStyles ? */
--- a/bits/48_stybin.js
+++ b/bits/48_stybin.js
@ -215,7 +215,7 @@ function parse_sty_bin(data, themes, opts) {
 	recordhopper(data, function hopper_sty(val, R, RT) {
 		switch(RT) {
 			case 0x002C: /* BrtFmt */
-				styles.NumberFmt[val[0]] = val[1]; SSF__load(val[1], val[0]);
+				styles.NumberFmt[val[0]] = val[1]; SSF_load(val[1], val[0]);
 				break;
 			case 0x002B: /* BrtFont */
 				styles.Fonts.push(val);
--- a/bits/49_theme.js
+++ b/bits/49_theme.js
@ -18,12 +18,10 @@ function parse_clrScheme(t, themes, opts) {
 			/* 20.1.2.3.32 srgbClr CT_SRgbColor */
 			case '<a:srgbClr':
 				color.rgb = y.val; break;
-			case '</a:srgbClr>': break;

 			/* 20.1.2.3.33 sysClr CT_SystemColor */
 			case '<a:sysClr':
 				color.rgb = y.lastClr; break;
-			case '</a:sysClr>': break;

 			/* 20.1.4.1.1 accent1 (Accent 1) */
 			/* 20.1.4.1.2 accent2 (Accent 2) */
@ -37,10 +35,8 @@ function parse_clrScheme(t, themes, opts) {
 			/* 20.1.4.1.19 hlink (Hyperlink) */
 			/* 20.1.4.1.22 lt1 (Light 1) */
 			/* 20.1.4.1.23 lt2 (Light 2) */
-			case '</a:dk1>':
-			case '</a:lt1>':
-			case '<a:dk1>':
-			case '<a:lt1>':
+			case '<a:dk1>': case '</a:dk1>':
+			case '<a:lt1>': case '</a:lt1>':
 			case '<a:dk2>': case '</a:dk2>':
 			case '<a:lt2>': case '</a:lt2>':
 			case '<a:accent1>': case '</a:accent1>':
@ -70,25 +66,31 @@ function parse_fontScheme(/*::t, themes, opts*/) { }
 /* 20.1.4.1.15 fmtScheme CT_StyleMatrix */
 function parse_fmtScheme(/*::t, themes, opts*/) { }

+var clrsregex = /<a:clrScheme([^>]*)>[\s\S]*<\/a:clrScheme>/;
+var fntsregex = /<a:fontScheme([^>]*)>[\s\S]*<\/a:fontScheme>/;
+var fmtsregex = /<a:fmtScheme([^>]*)>[\s\S]*<\/a:fmtScheme>/;
+
 /* 20.1.6.10 themeElements CT_BaseStyles */
 function parse_themeElements(data, themes, opts) {
 	themes.themeElements = {};

 	var t;

-	/* clrScheme CT_ColorScheme */
-	if(!(t=str_match_xml(data, "a:clrScheme"))) throw new Error('clrScheme not found in themeElements');
-	parse_clrScheme(t, themes, opts);
-
-	/* fontScheme CT_FontScheme */
-	if(!(t=str_match_xml(data, "a:fontScheme"))) throw new Error('fontScheme not found in themeElements');
-	parse_fontScheme(t, themes, opts);
-
-	/* fmtScheme CT_StyleMatrix */
-	if(!(t=str_match_xml(data, "a:fmtScheme"))) throw new Error('fmtScheme not found in themeElements');
-	parse_fmtScheme(t, themes, opts);
+	[
+		/* clrScheme CT_ColorScheme */
+		['clrScheme', clrsregex, parse_clrScheme],
+		/* fontScheme CT_FontScheme */
+		['fontScheme', fntsregex, parse_fontScheme],
+		/* fmtScheme CT_StyleMatrix */
+		['fmtScheme', fmtsregex, parse_fmtScheme]
+	].forEach(function(m) {
+		if(!(t=data.match(m[1]))) throw new Error(m[0] + ' not found in themeElements');
+		m[2](t, themes, opts);
+	});
 }

+var themeltregex = /<a:themeElements([^>]*)>[\s\S]*<\/a:themeElements>/;
+
 /* 14.2.7 Theme Part */
 function parse_theme_xml(data/*:string*/, opts) {
 	/* 20.1.6.9 theme CT_OfficeStyleSheet */
@ -98,7 +100,7 @@ function parse_theme_xml(data/*:string*/, opts) {
 	var themes = {};

 	/* themeElements CT_BaseStyles */
-	if(!(t=str_match_xml(data, "a:themeElements"))) throw new Error('themeElements not found in theme');
+	if(!(t=data.match(themeltregex))) throw new Error('themeElements not found in theme');
 	parse_themeElements(t[0], themes, opts);
 	themes.raw = data;
 	return themes;
--- a/bits/51_xlsxmeta.js
+++ b/bits/51_xlsxmeta.js
@ -71,7 +71,7 @@ function parse_xlmeta_xml(data, name, opts) {
        lastmeta.offsets.push(+y.i);
        break;
      default:
-        if (!pass && (opts == null ? void 0 : opts.WTF))
+        if (!pass && opts.WTF)
          throw new Error("unrecognized " + y[0] + " in metadata");
    }
    return x;
--- a/bits/54_drawing.js
+++ b/bits/54_drawing.js
@ -13,7 +13,7 @@ function parse_drawing(data, rels/*:any*/) {
 	   the actual type is based on the URI of the graphicData
 		TODO: handle embedded charts and other types of graphics
 	*/
-	var id = (data.match(/<c:chart [^<>]*r:id="([^<>"]*)"/)||["",""])[1];
+	var id = (data.match(/<c:chart [^>]*r:id="([^"]*)"/)||["",""])[1];

 	return rels['!id'][id].Target;
 }
--- a/bits/55_vml.js
+++ b/bits/55_vml.js
@ -1,64 +1,20 @@
 /* L.5.5.2 SpreadsheetML Comments + VML Schema */
-function parse_vml(data/*:string*/, sheet, comments) {
-	var cidx = 0;
-	(str_match_xml_ns_g(data, "shape")||[]).forEach(function(m) {
-		var type = "";
-		var hidden = true;
-		var aidx = -1;
-		var R = -1, C = -1;
-		m.replace(tagregex, function(x/*:string*/, idx/*:number*/) {
-			var y = parsexmltag(x);
-			switch(strip_ns(y[0])) {
-				case '<ClientData': if(y.ObjectType) type = y.ObjectType; break;
-
-				case '<Visible': case '<Visible/>': hidden = false; break;
-
-				case '<Row': case '<Row>': aidx = idx + x.length; break;
-				case '</Row>': R = +m.slice(aidx, idx).trim(); break;
-
-				case '<Column': case '<Column>': aidx = idx + x.length; break;
-				case '</Column>': C = +m.slice(aidx, idx).trim(); break;
-			}
-			return "";
-		});
-		switch(type) {
-		case 'Note':
-			var cell = ws_get_cell_stub(sheet, ((R>=0 && C>=0) ? encode_cell({r:R,c:C}) : comments[cidx].ref));
-			if(cell.c) {
-				cell.c.hidden = hidden;
-			}
-			++cidx;
-			break;
-		}
-
-	});
-}
-
-
-/* comment boxes */
-function write_vml(rId/*:number*/, comments, ws) {
+var _shapeid = 1024;
+function write_comments_vml(rId/*:number*/, comments) {
 	var csize = [21600, 21600];
 	/* L.5.2.1.2 Path Attribute */
 	var bbox = ["m0,0l0",csize[1],csize[0],csize[1],csize[0],"0xe"].join(",");
 	var o = [
 		writextag("xml", null, { 'xmlns:v': XLMLNS.v, 'xmlns:o': XLMLNS.o, 'xmlns:x': XLMLNS.x, 'xmlns:mv': XLMLNS.mv }).replace(/\/>/,">"),
-		writextag("o:shapelayout", writextag("o:idmap", null, {'v:ext':"edit", 'data':rId}), {'v:ext':"edit"})
+		writextag("o:shapelayout", writextag("o:idmap", null, {'v:ext':"edit", 'data':rId}), {'v:ext':"edit"}),
+		writextag("v:shapetype", [
+			writextag("v:stroke", null, {joinstyle:"miter"}),
+			writextag("v:path", null, {gradientshapeok:"t", 'o:connecttype':"rect"})
+		].join(""), {id:"_x0000_t202", 'o:spt':202, coordsize:csize.join(","),path:bbox})
 	];
+	while(_shapeid < rId * 1000) _shapeid += 1000;

-	var _shapeid = 65536 * rId;
-
-	var _comments = comments || [];
-	if(_comments.length > 0) o.push(writextag("v:shapetype", [
-		writextag("v:stroke", null, {joinstyle:"miter"}),
-		writextag("v:path", null, {gradientshapeok:"t", 'o:connecttype':"rect"})
-	].join(""), {id:"_x0000_t202", coordsize:csize.join(","), 'o:spt':202, path:bbox}));
-
-	_comments.forEach(function(x) { ++_shapeid; o.push(write_vml_comment(x, _shapeid)); });
-	o.push('</xml>');
-	return o.join("");
-}
-
-function write_vml_comment(x, _shapeid, ws)/*:string*/ {
+	comments.forEach(function(x) {
 	var c = decode_cell(x[0]);
 	var fillopts = /*::(*/{'color2':"#BEFF82", 'type':"gradient"}/*:: :any)*/;
 	if(fillopts.type == "gradient") fillopts.angle = "-180";
@ -66,8 +22,9 @@ function write_vml_comment(x, _shapeid, ws)/*:string*/ {
 	var fillxml = writextag('v:fill', fillparm, fillopts);

 	var shadata = ({on:"t", 'obscured':"t"}/*:any*/);
+	++_shapeid;

-	return [
+	o = o.concat([
 	'<v:shape' + wxt_helper({
 		id:'_x0000_s' + _shapeid,
 		type:"#_x0000_t202",
@ -90,5 +47,7 @@ function write_vml_comment(x, _shapeid, ws)/*:string*/ {
 			x[1].hidden ? '' : '<x:Visible/>',
 		'</x:ClientData>',
 	'</v:shape>'
-	].join("");
+	]); });
+	o.push('</xml>');
+	return o.join("");
 }
--- a/bits/56_cmntcommon.js
+++ b/bits/56_cmntcommon.js
@ -1,16 +1,15 @@
-function sheet_insert_comments(sheet/*:WorkSheet*/, comments/*:Array<RawComment>*/, threaded/*:boolean*/, people/*:?Array<any>*/) {
-	var dense = sheet["!data"] != null;
+function sheet_insert_comments(sheet, comments/*:Array<RawComment>*/, threaded/*:boolean*/, people/*:?Array<any>*/) {
+	var dense = Array.isArray(sheet);
 	var cell/*:Cell*/;
 	comments.forEach(function(comment) {
 		var r = decode_cell(comment.ref);
-		if(r.r < 0 || r.c < 0) return;
 		if(dense) {
-			if(!sheet["!data"][r.r]) sheet["!data"][r.r] = [];
-			cell = sheet["!data"][r.r][r.c];
+			if(!sheet[r.r]) sheet[r.r] = [];
+			cell = sheet[r.r][r.c];
 		} else cell = sheet[comment.ref];
 		if (!cell) {
 			cell = ({t:"z"}/*:any*/);
-			if(dense) sheet["!data"][r.r][r.c] = cell;
+			if(dense) sheet[r.r][r.c] = cell;
 			else sheet[comment.ref] = cell;
 			var range = safe_decode_range(sheet["!ref"]||"BDWGO1000001:A1");
 			if(range.s.r > r.r) range.s.r = r.r;
@ -18,7 +17,7 @@ function sheet_insert_comments(sheet/*:WorkSheet*/, comments/*:Array<RawComment>
 			if(range.s.c > r.c) range.s.c = r.c;
 			if(range.e.c < r.c) range.e.c = r.c;
 			var encoded = encode_range(range);
-			sheet["!ref"] = encoded;
+			if (encoded !== sheet["!ref"]) sheet["!ref"] = encoded;
 		}

 		if (!cell.c) cell.c = [];
@ -36,3 +35,4 @@ function sheet_insert_comments(sheet/*:WorkSheet*/, comments/*:Array<RawComment>
 		cell.c.push(o);
 	});
 }
+
--- a/bits/57_cmntxml.js
+++ b/bits/57_cmntxml.js
@ -4,22 +4,22 @@ function parse_comments_xml(data/*:string*/, opts)/*:Array<RawComment>*/ {
 	if(data.match(/<(?:\w+:)?comments *\/>/)) return [];
 	var authors/*:Array<string>*/ = [];
 	var commentList/*:Array<RawComment>*/ = [];
-	var authtag = str_match_xml_ns(data, "authors");
+	var authtag = data.match(/<(?:\w+:)?authors>([\s\S]*)<\/(?:\w+:)?authors>/);
 	if(authtag && authtag[1]) authtag[1].split(/<\/\w*:?author>/).forEach(function(x) {
 		if(x === "" || x.trim() === "") return;
-		var a = x.match(/<(?:\w+:)?author[^<>]*>(.*)/);
+		var a = x.match(/<(?:\w+:)?author[^>]*>(.*)/);
 		if(a) authors.push(a[1]);
 	});
-	var cmnttag = str_match_xml_ns(data, "commentList");
+	var cmnttag = data.match(/<(?:\w+:)?commentList>([\s\S]*)<\/(?:\w+:)?commentList>/);
 	if(cmnttag && cmnttag[1]) cmnttag[1].split(/<\/\w*:?comment>/).forEach(function(x) {
 		if(x === "" || x.trim() === "") return;
-		var cm = x.match(/<(?:\w+:)?comment[^<>]*>/);
+		var cm = x.match(/<(?:\w+:)?comment[^>]*>/);
 		if(!cm) return;
 		var y = parsexmltag(cm[0]);
 		var comment/*:RawComment*/ = ({ author: y.authorId && authors[y.authorId] || "sheetjsghost", ref: y.ref, guid: y.guid }/*:any*/);
 		var cell = decode_cell(y.ref);
 		if(opts.sheetRows && opts.sheetRows <= cell.r) return;
-		var textMatch = str_match_xml_ns(x, "text");
+		var textMatch = x.match(/<(?:\w+:)?text>([\s\S]*)<\/(?:\w+:)?text>/);
 		var rt = !!textMatch && !!textMatch[1] && parse_si(textMatch[1]) || {r:"",t:"",h:""};
 		comment.r = rt.r;
 		if(rt.r == "<t></t>") rt.t = rt.h = "";
@ -50,28 +50,21 @@ function write_comments_xml(data/*::, opts*/) {
 	o.push("<commentList>");
 	data.forEach(function(d) {
 		/* 18.7.3 CT_Comment */
-		var lastauthor = 0, ts = [], tcnt = 0;
+		var lastauthor = 0, ts = [];
 		if(d[1][0] && d[1][0].T && d[1][0].ID) lastauthor = iauthor.indexOf("tc=" + d[1][0].ID);
-		d[1].forEach(function(c) {
+		else d[1].forEach(function(c) {
 			if(c.a) lastauthor = iauthor.indexOf(escapexml(c.a));
-			if(c.T) ++tcnt;
-			ts.push(c.t == null ? "" : escapexml(c.t));
+			ts.push(c.t||"");
 		});
-		if(tcnt === 0) {
-			d[1].forEach(function(c) {
-				o.push('<comment ref="' + d[0] + '" authorId="' + iauthor.indexOf(escapexml(c.a)) + '"><text>');
-				o.push(writetag("t", c.t == null ? "" : escapexml(c.t)));
-				o.push('</text></comment>');
-			});
-		} else {
-			if(d[1][0] && d[1][0].T && d[1][0].ID) lastauthor = iauthor.indexOf("tc=" + d[1][0].ID);
+		o.push('<comment ref="' + d[0] + '" authorId="' + lastauthor + '"><text>');
+		if(ts.length <= 1) o.push(writetag("t", escapexml(ts[0]||"")));
+		else {
 			/* based on Threaded Comments -> Comments projection */
-			o.push('<comment ref="' + d[0] + '" authorId="' + lastauthor + '"><text>');
 			var t = "Comment:\n    " + (ts[0]) + "\n";
 			for(var i = 1; i < ts.length; ++i) t += "Reply:\n    " + ts[i] + "\n";
 			o.push(writetag("t", escapexml(t)));
-			o.push('</text></comment>');
 		}
+		o.push('</text></comment>');
 	});
 	o.push("</commentList>");
 	if(o.length>2) { o[o.length] = ('</comments>'); o[1]=o[1].replace("/>",">"); }
--- a/bits/58_cmntbin.js
+++ b/bits/58_cmntbin.js
@ -74,10 +74,6 @@ function write_comments_bin(data/*::, opts*/) {
 			if(iauthor.indexOf(c.a) > -1) return;
 			iauthor.push(c.a.slice(0,54));
 			write_record(ba, 0x0278 /* BrtCommentAuthor */, write_BrtCommentAuthor(c.a));
-			if(c.T && c.ID && iauthor.indexOf("tc=" + c.ID) == -1) {
-				iauthor.push("tc=" + c.ID);
-				write_record(ba, 0x0278 /* BrtCommentAuthor */, write_BrtCommentAuthor("tc=" + c.ID));
-			}
 		});
 	});
 	write_record(ba, 0x0277 /* BrtEndCommentAuthors */);
@ -85,11 +81,7 @@ function write_comments_bin(data/*::, opts*/) {
 	write_record(ba, 0x0279 /* BrtBeginCommentList */);
 	data.forEach(function(comment) {
 		comment[1].forEach(function(c) {
-			var _ia = -1;
-			if(c.ID) _ia = iauthor.indexOf("tc=" + c.ID);
-			if(_ia == -1 && comment[1][0].T && comment[1][0].ID) _ia = iauthor.indexOf("tc=" + comment[1][0].ID);
-			if(_ia == -1) _ia = iauthor.indexOf(c.a);
-			c.iauthor = _ia;
+			c.iauthor = iauthor.indexOf(c.a);
 			var range = {s:decode_cell(comment[0]),e:decode_cell(comment[0])};
 			write_record(ba, 0x027B /* BrtBeginComment */, write_BrtBeginComment([range, c]));
 			if(c.t && c.t.length > 0) write_record(ba, 0x027D /* BrtCommentText */, write_BrtCommentText(c));
--- a/bits/59_vba.js
+++ b/bits/59_vba.js
@ -13,7 +13,7 @@ function fill_vba_xls(cfb, vba) {
  vba.FullPaths.forEach(function(p, i) {
    if (i == 0)
      return;
-    var newpath = p.replace(/^[\/]*[^\/]*[\/]/, "/_VBA_PROJECT_CUR/");
+    var newpath = p.replace(/[^\/]*[\/]/, "/_VBA_PROJECT_CUR/");
    if (newpath.slice(-1) !== "/")
      CFB.utils.cfb_add(cfb, newpath, vba.FileIndex[i].content);
  });
--- a/bits/61_fcommon.js
+++ b/bits/61_fcommon.js
@ -23,17 +23,14 @@ var rc_to_a1 = /*#__PURE__*/(function(){
 	};
 })();

-var crefregex = /(^|[^._A-Z0-9])(\$?)([A-Z]{1,2}|[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D])(\$?)(\d{1,7})(?![_.\(A-Za-z0-9])/g;
-try {
-	crefregex = /(^|[^._A-Z0-9])([$]?)([A-Z]{1,2}|[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D])([$]?)(10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})(?![_.\(A-Za-z0-9])/g;
-}catch(e){}
+var crefregex = /(^|[^._A-Z0-9])([$]?)([A-Z]{1,2}|[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D])([$]?)(10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})(?![_.\(A-Za-z0-9])/g;
 var a1_to_rc = /*#__PURE__*/(function(){
 	return function a1_to_rc(fstr/*:string*/, base/*:CellAddress*/) {
 		return fstr.replace(crefregex, function($0, $1, $2, $3, $4, $5) {
 			var c = decode_col($3) - ($2 ? 0 : base.c);
 			var r = decode_row($5) - ($4 ? 0 : base.r);
-			var R = $4 == "$" ? (r+1) : (r == 0 ? "" : "[" + r + "]");
-			var C = $2 == "$" ? (c+1) : (c == 0 ? "" : "[" + c + "]");
+			var R = (r == 0 ? "" : !$4 ? "[" + r + "]" : (r+1));
+			var C = (c == 0 ? "" : !$2 ? "[" + c + "]" : (c+1));
 			return $1 + "R" + R + "C" + C;
 		});
 	};
--- a/bits/62_fxls.js
+++ b/bits/62_fxls.js
@ -495,112 +495,112 @@ function parse_PtgAttrNoop(blob/*::, length, opts*/) {

 /* [MS-XLS] 2.5.198.25 ; [MS-XLSB] 2.5.97.16 */
 var PtgTypes = {
-	0x01: { n:'PtgExp', f:parse_PtgExp },
-	0x02: { n:'PtgTbl', f:parse_PtgTbl },
-	0x03: { n:'PtgAdd', f:parseread1 },
-	0x04: { n:'PtgSub', f:parseread1 },
-	0x05: { n:'PtgMul', f:parseread1 },
-	0x06: { n:'PtgDiv', f:parseread1 },
-	0x07: { n:'PtgPower', f:parseread1 },
-	0x08: { n:'PtgConcat', f:parseread1 },
-	0x09: { n:'PtgLt', f:parseread1 },
-	0x0A: { n:'PtgLe', f:parseread1 },
-	0x0B: { n:'PtgEq', f:parseread1 },
-	0x0C: { n:'PtgGe', f:parseread1 },
-	0x0D: { n:'PtgGt', f:parseread1 },
-	0x0E: { n:'PtgNe', f:parseread1 },
-	0x0F: { n:'PtgIsect', f:parseread1 },
-	0x10: { n:'PtgUnion', f:parseread1 },
-	0x11: { n:'PtgRange', f:parseread1 },
-	0x12: { n:'PtgUplus', f:parseread1 },
-	0x13: { n:'PtgUminus', f:parseread1 },
-	0x14: { n:'PtgPercent', f:parseread1 },
-	0x15: { n:'PtgParen', f:parseread1 },
-	0x16: { n:'PtgMissArg', f:parseread1 },
-	0x17: { n:'PtgStr', f:parse_PtgStr },
-	0x1A: { n:'PtgSheet', f:parse_PtgSheet },
-	0x1B: { n:'PtgEndSheet', f:parse_PtgEndSheet },
-	0x1C: { n:'PtgErr', f:parse_PtgErr },
-	0x1D: { n:'PtgBool', f:parse_PtgBool },
-	0x1E: { n:'PtgInt', f:parse_PtgInt },
-	0x1F: { n:'PtgNum', f:parse_PtgNum },
-	0x20: { n:'PtgArray', f:parse_PtgArray },
-	0x21: { n:'PtgFunc', f:parse_PtgFunc },
-	0x22: { n:'PtgFuncVar', f:parse_PtgFuncVar },
-	0x23: { n:'PtgName', f:parse_PtgName },
-	0x24: { n:'PtgRef', f:parse_PtgRef },
-	0x25: { n:'PtgArea', f:parse_PtgArea },
-	0x26: { n:'PtgMemArea', f:parse_PtgMemArea },
-	0x27: { n:'PtgMemErr', f:parse_PtgMemErr },
-	0x28: { n:'PtgMemNoMem', f:parse_PtgMemNoMem },
-	0x29: { n:'PtgMemFunc', f:parse_PtgMemFunc },
-	0x2A: { n:'PtgRefErr', f:parse_PtgRefErr },
-	0x2B: { n:'PtgAreaErr', f:parse_PtgAreaErr },
-	0x2C: { n:'PtgRefN', f:parse_PtgRefN },
-	0x2D: { n:'PtgAreaN', f:parse_PtgAreaN },
-	0x2E: { n:'PtgMemAreaN', f:parse_PtgMemAreaN },
-	0x2F: { n:'PtgMemNoMemN', f:parse_PtgMemNoMemN },
-	0x39: { n:'PtgNameX', f:parse_PtgNameX },
-	0x3A: { n:'PtgRef3d', f:parse_PtgRef3d },
-	0x3B: { n:'PtgArea3d', f:parse_PtgArea3d },
-	0x3C: { n:'PtgRefErr3d', f:parse_PtgRefErr3d },
-	0x3D: { n:'PtgAreaErr3d', f:parse_PtgAreaErr3d },
-	0xFF: {}
+	/*::[*/0x01/*::]*/: { n:'PtgExp', f:parse_PtgExp },
+	/*::[*/0x02/*::]*/: { n:'PtgTbl', f:parse_PtgTbl },
+	/*::[*/0x03/*::]*/: { n:'PtgAdd', f:parseread1 },
+	/*::[*/0x04/*::]*/: { n:'PtgSub', f:parseread1 },
+	/*::[*/0x05/*::]*/: { n:'PtgMul', f:parseread1 },
+	/*::[*/0x06/*::]*/: { n:'PtgDiv', f:parseread1 },
+	/*::[*/0x07/*::]*/: { n:'PtgPower', f:parseread1 },
+	/*::[*/0x08/*::]*/: { n:'PtgConcat', f:parseread1 },
+	/*::[*/0x09/*::]*/: { n:'PtgLt', f:parseread1 },
+	/*::[*/0x0A/*::]*/: { n:'PtgLe', f:parseread1 },
+	/*::[*/0x0B/*::]*/: { n:'PtgEq', f:parseread1 },
+	/*::[*/0x0C/*::]*/: { n:'PtgGe', f:parseread1 },
+	/*::[*/0x0D/*::]*/: { n:'PtgGt', f:parseread1 },
+	/*::[*/0x0E/*::]*/: { n:'PtgNe', f:parseread1 },
+	/*::[*/0x0F/*::]*/: { n:'PtgIsect', f:parseread1 },
+	/*::[*/0x10/*::]*/: { n:'PtgUnion', f:parseread1 },
+	/*::[*/0x11/*::]*/: { n:'PtgRange', f:parseread1 },
+	/*::[*/0x12/*::]*/: { n:'PtgUplus', f:parseread1 },
+	/*::[*/0x13/*::]*/: { n:'PtgUminus', f:parseread1 },
+	/*::[*/0x14/*::]*/: { n:'PtgPercent', f:parseread1 },
+	/*::[*/0x15/*::]*/: { n:'PtgParen', f:parseread1 },
+	/*::[*/0x16/*::]*/: { n:'PtgMissArg', f:parseread1 },
+	/*::[*/0x17/*::]*/: { n:'PtgStr', f:parse_PtgStr },
+	/*::[*/0x1A/*::]*/: { n:'PtgSheet', f:parse_PtgSheet },
+	/*::[*/0x1B/*::]*/: { n:'PtgEndSheet', f:parse_PtgEndSheet },
+	/*::[*/0x1C/*::]*/: { n:'PtgErr', f:parse_PtgErr },
+	/*::[*/0x1D/*::]*/: { n:'PtgBool', f:parse_PtgBool },
+	/*::[*/0x1E/*::]*/: { n:'PtgInt', f:parse_PtgInt },
+	/*::[*/0x1F/*::]*/: { n:'PtgNum', f:parse_PtgNum },
+	/*::[*/0x20/*::]*/: { n:'PtgArray', f:parse_PtgArray },
+	/*::[*/0x21/*::]*/: { n:'PtgFunc', f:parse_PtgFunc },
+	/*::[*/0x22/*::]*/: { n:'PtgFuncVar', f:parse_PtgFuncVar },
+	/*::[*/0x23/*::]*/: { n:'PtgName', f:parse_PtgName },
+	/*::[*/0x24/*::]*/: { n:'PtgRef', f:parse_PtgRef },
+	/*::[*/0x25/*::]*/: { n:'PtgArea', f:parse_PtgArea },
+	/*::[*/0x26/*::]*/: { n:'PtgMemArea', f:parse_PtgMemArea },
+	/*::[*/0x27/*::]*/: { n:'PtgMemErr', f:parse_PtgMemErr },
+	/*::[*/0x28/*::]*/: { n:'PtgMemNoMem', f:parse_PtgMemNoMem },
+	/*::[*/0x29/*::]*/: { n:'PtgMemFunc', f:parse_PtgMemFunc },
+	/*::[*/0x2A/*::]*/: { n:'PtgRefErr', f:parse_PtgRefErr },
+	/*::[*/0x2B/*::]*/: { n:'PtgAreaErr', f:parse_PtgAreaErr },
+	/*::[*/0x2C/*::]*/: { n:'PtgRefN', f:parse_PtgRefN },
+	/*::[*/0x2D/*::]*/: { n:'PtgAreaN', f:parse_PtgAreaN },
+	/*::[*/0x2E/*::]*/: { n:'PtgMemAreaN', f:parse_PtgMemAreaN },
+	/*::[*/0x2F/*::]*/: { n:'PtgMemNoMemN', f:parse_PtgMemNoMemN },
+	/*::[*/0x39/*::]*/: { n:'PtgNameX', f:parse_PtgNameX },
+	/*::[*/0x3A/*::]*/: { n:'PtgRef3d', f:parse_PtgRef3d },
+	/*::[*/0x3B/*::]*/: { n:'PtgArea3d', f:parse_PtgArea3d },
+	/*::[*/0x3C/*::]*/: { n:'PtgRefErr3d', f:parse_PtgRefErr3d },
+	/*::[*/0x3D/*::]*/: { n:'PtgAreaErr3d', f:parse_PtgAreaErr3d },
+	/*::[*/0xFF/*::]*/: {}
 };
 /* These are duplicated in the PtgTypes table */
 var PtgDupes = {
-	0x40: 0x20, 0x60: 0x20,
-	0x41: 0x21, 0x61: 0x21,
-	0x42: 0x22, 0x62: 0x22,
-	0x43: 0x23, 0x63: 0x23,
-	0x44: 0x24, 0x64: 0x24,
-	0x45: 0x25, 0x65: 0x25,
-	0x46: 0x26, 0x66: 0x26,
-	0x47: 0x27, 0x67: 0x27,
-	0x48: 0x28, 0x68: 0x28,
-	0x49: 0x29, 0x69: 0x29,
-	0x4A: 0x2A, 0x6A: 0x2A,
-	0x4B: 0x2B, 0x6B: 0x2B,
-	0x4C: 0x2C, 0x6C: 0x2C,
-	0x4D: 0x2D, 0x6D: 0x2D,
-	0x4E: 0x2E, 0x6E: 0x2E,
-	0x4F: 0x2F, 0x6F: 0x2F,
-	0x58: 0x22, 0x78: 0x22,
-	0x59: 0x39, 0x79: 0x39,
-	0x5A: 0x3A, 0x7A: 0x3A,
-	0x5B: 0x3B, 0x7B: 0x3B,
-	0x5C: 0x3C, 0x7C: 0x3C,
-	0x5D: 0x3D, 0x7D: 0x3D
+	/*::[*/0x40/*::]*/: 0x20, /*::[*/0x60/*::]*/: 0x20,
+	/*::[*/0x41/*::]*/: 0x21, /*::[*/0x61/*::]*/: 0x21,
+	/*::[*/0x42/*::]*/: 0x22, /*::[*/0x62/*::]*/: 0x22,
+	/*::[*/0x43/*::]*/: 0x23, /*::[*/0x63/*::]*/: 0x23,
+	/*::[*/0x44/*::]*/: 0x24, /*::[*/0x64/*::]*/: 0x24,
+	/*::[*/0x45/*::]*/: 0x25, /*::[*/0x65/*::]*/: 0x25,
+	/*::[*/0x46/*::]*/: 0x26, /*::[*/0x66/*::]*/: 0x26,
+	/*::[*/0x47/*::]*/: 0x27, /*::[*/0x67/*::]*/: 0x27,
+	/*::[*/0x48/*::]*/: 0x28, /*::[*/0x68/*::]*/: 0x28,
+	/*::[*/0x49/*::]*/: 0x29, /*::[*/0x69/*::]*/: 0x29,
+	/*::[*/0x4A/*::]*/: 0x2A, /*::[*/0x6A/*::]*/: 0x2A,
+	/*::[*/0x4B/*::]*/: 0x2B, /*::[*/0x6B/*::]*/: 0x2B,
+	/*::[*/0x4C/*::]*/: 0x2C, /*::[*/0x6C/*::]*/: 0x2C,
+	/*::[*/0x4D/*::]*/: 0x2D, /*::[*/0x6D/*::]*/: 0x2D,
+	/*::[*/0x4E/*::]*/: 0x2E, /*::[*/0x6E/*::]*/: 0x2E,
+	/*::[*/0x4F/*::]*/: 0x2F, /*::[*/0x6F/*::]*/: 0x2F,
+	/*::[*/0x58/*::]*/: 0x22, /*::[*/0x78/*::]*/: 0x22,
+	/*::[*/0x59/*::]*/: 0x39, /*::[*/0x79/*::]*/: 0x39,
+	/*::[*/0x5A/*::]*/: 0x3A, /*::[*/0x7A/*::]*/: 0x3A,
+	/*::[*/0x5B/*::]*/: 0x3B, /*::[*/0x7B/*::]*/: 0x3B,
+	/*::[*/0x5C/*::]*/: 0x3C, /*::[*/0x7C/*::]*/: 0x3C,
+	/*::[*/0x5D/*::]*/: 0x3D, /*::[*/0x7D/*::]*/: 0x3D
 };

 var Ptg18 = {
-	0x01: { n:'PtgElfLel', f:parse_PtgElfLel },
-	0x02: { n:'PtgElfRw', f:parse_PtgElfRw },
-	0x03: { n:'PtgElfCol', f:parse_PtgElfCol },
-	0x06: { n:'PtgElfRwV', f:parse_PtgElfRwV },
-	0x07: { n:'PtgElfColV', f:parse_PtgElfColV },
-	0x0A: { n:'PtgElfRadical', f:parse_PtgElfRadical },
-	0x0B: { n:'PtgElfRadicalS', f:parse_PtgElfRadicalS },
-	0x0D: { n:'PtgElfColS', f:parse_PtgElfColS },
-	0x0F: { n:'PtgElfColSV', f:parse_PtgElfColSV },
-	0x10: { n:'PtgElfRadicalLel', f:parse_PtgElfRadicalLel },
-	0x19: { n:'PtgList', f:parse_PtgList },
-	0x1D: { n:'PtgSxName', f:parse_PtgSxName },
-	0xFF: {}
+	/*::[*/0x01/*::]*/: { n:'PtgElfLel', f:parse_PtgElfLel },
+	/*::[*/0x02/*::]*/: { n:'PtgElfRw', f:parse_PtgElfRw },
+	/*::[*/0x03/*::]*/: { n:'PtgElfCol', f:parse_PtgElfCol },
+	/*::[*/0x06/*::]*/: { n:'PtgElfRwV', f:parse_PtgElfRwV },
+	/*::[*/0x07/*::]*/: { n:'PtgElfColV', f:parse_PtgElfColV },
+	/*::[*/0x0A/*::]*/: { n:'PtgElfRadical', f:parse_PtgElfRadical },
+	/*::[*/0x0B/*::]*/: { n:'PtgElfRadicalS', f:parse_PtgElfRadicalS },
+	/*::[*/0x0D/*::]*/: { n:'PtgElfColS', f:parse_PtgElfColS },
+	/*::[*/0x0F/*::]*/: { n:'PtgElfColSV', f:parse_PtgElfColSV },
+	/*::[*/0x10/*::]*/: { n:'PtgElfRadicalLel', f:parse_PtgElfRadicalLel },
+	/*::[*/0x19/*::]*/: { n:'PtgList', f:parse_PtgList },
+	/*::[*/0x1D/*::]*/: { n:'PtgSxName', f:parse_PtgSxName },
+	/*::[*/0xFF/*::]*/: {}
 };
 var Ptg19 = {
-	0x00: { n:'PtgAttrNoop', f:parse_PtgAttrNoop },
-	0x01: { n:'PtgAttrSemi', f:parse_PtgAttrSemi },
-	0x02: { n:'PtgAttrIf', f:parse_PtgAttrIf },
-	0x04: { n:'PtgAttrChoose', f:parse_PtgAttrChoose },
-	0x08: { n:'PtgAttrGoto', f:parse_PtgAttrGoto },
-	0x10: { n:'PtgAttrSum', f:parse_PtgAttrSum },
-	0x20: { n:'PtgAttrBaxcel', f:parse_PtgAttrBaxcel },
-	0x21: { n:'PtgAttrBaxcel', f:parse_PtgAttrBaxcel },
-	0x40: { n:'PtgAttrSpace', f:parse_PtgAttrSpace },
-	0x41: { n:'PtgAttrSpaceSemi', f:parse_PtgAttrSpaceSemi },
-	0x80: { n:'PtgAttrIfError', f:parse_PtgAttrIfError },
-	0xFF: {}
+	/*::[*/0x00/*::]*/: { n:'PtgAttrNoop', f:parse_PtgAttrNoop },
+	/*::[*/0x01/*::]*/: { n:'PtgAttrSemi', f:parse_PtgAttrSemi },
+	/*::[*/0x02/*::]*/: { n:'PtgAttrIf', f:parse_PtgAttrIf },
+	/*::[*/0x04/*::]*/: { n:'PtgAttrChoose', f:parse_PtgAttrChoose },
+	/*::[*/0x08/*::]*/: { n:'PtgAttrGoto', f:parse_PtgAttrGoto },
+	/*::[*/0x10/*::]*/: { n:'PtgAttrSum', f:parse_PtgAttrSum },
+	/*::[*/0x20/*::]*/: { n:'PtgAttrBaxcel', f:parse_PtgAttrBaxcel },
+	/*::[*/0x21/*::]*/: { n:'PtgAttrBaxcel', f:parse_PtgAttrBaxcel },
+	/*::[*/0x40/*::]*/: { n:'PtgAttrSpace', f:parse_PtgAttrSpace },
+	/*::[*/0x41/*::]*/: { n:'PtgAttrSpaceSemi', f:parse_PtgAttrSpaceSemi },
+	/*::[*/0x80/*::]*/: { n:'PtgAttrIfError', f:parse_PtgAttrIfError },
+	/*::[*/0xFF/*::]*/: {}
 };

 /* [MS-XLS] 2.5.198.103 ; [MS-XLSB] 2.5.97.87 */
@ -688,15 +688,12 @@ var PtgBinOp = {
 	PtgSub: "-"
 };

-// TODO: explore space
-function make_3d_range(start, end) {
-	var s = start.lastIndexOf("!"), e = end.lastIndexOf("!");
-	if(s == -1 && e == -1) return start + ":" + end;
-	if(s > 0 && e > 0 && start.slice(0, s).toLowerCase() == end.slice(0, e).toLowerCase()) return start + ":" + end.slice(e+1);
-	console.error("Cannot hydrate range", start, end);
-	return start + ":" + end;
+// List of invalid characters needs to be tested further
+function formula_quote_sheet_name(sname/*:string*/, opts)/*:string*/ {
+	if(!sname && !(opts && opts.biff <= 5 && opts.biff >= 2)) throw new Error("empty sheet name");
+	if (/[^\w\u4E00-\u9FFF\u3040-\u30FF]/.test(sname)) return "'" + sname + "'";
+	return sname;
 }
-
 function get_ixti_raw(supbooks, ixti/*:number*/, opts)/*:string*/ {
 	if(!supbooks) return "SH33TJSERR0";
 	if(opts.biff > 8 && (!supbooks.XTI || !supbooks.XTI[ixti])) return supbooks.SheetNames[ixti];
@ -793,7 +790,7 @@ function stringify_formula(formula/*Array<any>*/, range, cell/*:any*/, supbooks,
 				break;
 			case 'PtgRange': /* [MS-XLS] 2.5.198.83 */
 				e1 = stack.pop(); e2 = stack.pop();
-				stack.push(make_3d_range(e2,e1));
+				stack.push(e2+":"+e1);
 				break;

 			case 'PtgAttrChoose': /* [MS-XLS] 2.5.198.34 */
@ -1041,7 +1038,6 @@ function stringify_formula(formula/*Array<any>*/, range, cell/*:any*/, supbooks,
 		}
 	}
 	if(stack.length > 1 && opts.WTF) throw new Error("bad formula stack");
-	if(stack[0] == "TRUE") return true; if(stack[0] == "FALSE") return false;
 	return stack[0];
 }

--- a/bits/63_fbin.js
+++ b/bits/63_fbin.js
@ -68,7 +68,8 @@ function write_FormulaValue(value) {
 /* [MS-XLS] 2.4.127 TODO */
 function parse_Formula(blob, length, opts) {
 	var end = blob.l + length;
-	var cell = parse_XLSCell(blob, 6, opts);
+	var cell = parse_XLSCell(blob, 6);
+	if(opts.biff == 2) ++blob.l;
 	var val = parse_FormulaValue(blob,8);
 	var flags = blob.read_shift(1);
 	if(opts.biff != 2) {
@ -123,209 +124,3 @@ var parse_XLSBCellParsedFormula = parse_XLSBParsedFormula;
 var parse_XLSBNameParsedFormula = parse_XLSBParsedFormula;
 /* [MS-XLSB] 2.5.97.98 SharedParsedFormula */
 var parse_XLSBSharedParsedFormula = parse_XLSBParsedFormula;
-
-/* Writes a PtgNum or PtgInt */
-function write_XLSBFormulaNum(val/*:number*/) {
-	if((val | 0) == val && val < Math.pow(2,16) && val >= 0) {
-		var oint = new_buf(11);
-		oint.write_shift(4, 3);
-		oint.write_shift(1, 0x1e);
-		oint.write_shift(2, val);
-		oint.write_shift(4, 0);
-		return oint;
-	}
-
-	var num = new_buf(17);
-	num.write_shift(4, 11);
-	num.write_shift(1, 0x1f);
-	num.write_shift(8, val);
-	num.write_shift(4, 0);
-	return num;
-}
-/* Writes a PtgErr */
-function write_XLSBFormulaErr(val/*:number*/) {
-	var oint = new_buf(10);
-	oint.write_shift(4, 2);
-	oint.write_shift(1, 0x1C);
-	oint.write_shift(1, val);
-	oint.write_shift(4, 0);
-	return oint;
-}
-/* Writes a PtgBool */
-function write_XLSBFormulaBool(val/*:boolean*/) {
-	var oint = new_buf(10);
-	oint.write_shift(4, 2);
-	oint.write_shift(1, 0x1D);
-	oint.write_shift(1, val?1:0);
-	oint.write_shift(4, 0);
-	return oint;
-}
-
-/* Writes a PtgStr */
-function write_XLSBFormulaStr(val/*:string*/) {
-	var preamble = new_buf(7);
-	preamble.write_shift(4, 3 + 2 * val.length);
-	preamble.write_shift(1, 0x17);
-	preamble.write_shift(2, val.length);
-
-	var body = new_buf(2 * val.length);
-	body.write_shift(2 * val.length, val, "utf16le");
-
-	var postamble = new_buf(4);
-	postamble.write_shift(4, 0);
-
-	return bconcat([preamble, body, postamble]);
-}
-
-/* Writes a PtgRef */
-function write_XLSBFormulaRef(str) {
-	var cell = decode_cell(str);
-	var out = new_buf(15);
-	out.write_shift(4, 7);
-	out.write_shift(1, 0x04 | ((1)<<5));
-	out.write_shift(4, cell.r);
-	out.write_shift(2, cell.c | ((str.charAt(0) == "$" ? 0 : 1)<<14) | ((str.match(/\$\d/) ? 0 : 1)<<15)); // <== ColRelShort
-	out.write_shift(4, 0);
-
-	return out;
-}
-
-/* Writes a PtgRef3d */
-function write_XLSBFormulaRef3D(str, wb) {
-	var lastbang = str.lastIndexOf("!");
-	var sname = str.slice(0, lastbang);
-	str = str.slice(lastbang+1);
-	var cell = decode_cell(str);
-	if(sname.charAt(0) == "'") sname = sname.slice(1, -1).replace(/''/g, "'");
-
-	var out = new_buf(17);
-	out.write_shift(4, 9);
-	out.write_shift(1, 0x1A | ((1)<<5));
-	out.write_shift(2, 2 + wb.SheetNames.map(function(n) { return n.toLowerCase(); }).indexOf(sname.toLowerCase()));
-	out.write_shift(4, cell.r);
-	out.write_shift(2, cell.c | ((str.charAt(0) == "$" ? 0 : 1)<<14) | ((str.match(/\$\d/) ? 0 : 1)<<15)); // <== ColRelShort
-	out.write_shift(4, 0);
-
-	return out;
-}
-
-/* Writes a PtgRefErr3d */
-function write_XLSBFormulaRefErr3D(str, wb) {
-	var lastbang = str.lastIndexOf("!");
-	var sname = str.slice(0, lastbang);
-	str = str.slice(lastbang+1);
-	if(sname.charAt(0) == "'") sname = sname.slice(1, -1).replace(/''/g, "'");
-
-	var out = new_buf(17);
-	out.write_shift(4, 9);
-	out.write_shift(1, 0x1C | ((1)<<5));
-	out.write_shift(2, 2 + wb.SheetNames.map(function(n) { return n.toLowerCase(); }).indexOf(sname.toLowerCase()));
-	out.write_shift(4, 0);
-	out.write_shift(2, 0); // <== ColRelShort
-	out.write_shift(4, 0);
-
-	return out;
-}
-
-/* Writes a single sheet range [PtgRef PtgRef PtgRange] */
-function write_XLSBFormulaRange(_str) {
-	var parts = _str.split(":"), str = parts[0];
-
-	var out = new_buf(23);
-	out.write_shift(4, 15);
-
-	/* start cell */
-	str = parts[0]; var cell = decode_cell(str);
-	out.write_shift(1, 0x04 | ((1)<<5));
-	out.write_shift(4, cell.r);
-	out.write_shift(2, cell.c | ((str.charAt(0) == "$" ? 0 : 1)<<14) | ((str.match(/\$\d/) ? 0 : 1)<<15)); // <== ColRelShort
-	out.write_shift(4, 0);
-
-	/* end cell */
-	str = parts[1]; cell = decode_cell(str);
-	out.write_shift(1, 0x04 | ((1)<<5));
-	out.write_shift(4, cell.r);
-	out.write_shift(2, cell.c | ((str.charAt(0) == "$" ? 0 : 1)<<14) | ((str.match(/\$\d/) ? 0 : 1)<<15)); // <== ColRelShort
-	out.write_shift(4, 0);
-
-	/* PtgRange */
-	out.write_shift(1, 0x11);
-
-	out.write_shift(4, 0);
-
-	return out;
-}
-
-/* Writes a range with explicit sheet name [PtgRef3D PtgRef3D PtgRange] */
-function write_XLSBFormulaRangeWS(_str, wb) {
-	var lastbang = _str.lastIndexOf("!");
-	var sname = _str.slice(0, lastbang);
-	_str = _str.slice(lastbang+1);
-	if(sname.charAt(0) == "'") sname = sname.slice(1, -1).replace(/''/g, "'");
-	var parts = _str.split(":");
-
-	var out = new_buf(27);
-	out.write_shift(4, 19);
-
-	/* start cell */
-	var str = parts[0], cell = decode_cell(str);
-	out.write_shift(1, 0x1A | ((1)<<5));
-	out.write_shift(2, 2 + wb.SheetNames.map(function(n) { return n.toLowerCase(); }).indexOf(sname.toLowerCase()));
-	out.write_shift(4, cell.r);
-	out.write_shift(2, cell.c | ((str.charAt(0) == "$" ? 0 : 1)<<14) | ((str.match(/\$\d/) ? 0 : 1)<<15)); // <== ColRelShort
-
-	/* end cell */
-	str = parts[1]; cell = decode_cell(str);
-	out.write_shift(1, 0x1A | ((1)<<5));
-	out.write_shift(2, 2 + wb.SheetNames.map(function(n) { return n.toLowerCase(); }).indexOf(sname.toLowerCase()));
-	out.write_shift(4, cell.r);
-	out.write_shift(2, cell.c | ((str.charAt(0) == "$" ? 0 : 1)<<14) | ((str.match(/\$\d/) ? 0 : 1)<<15)); // <== ColRelShort
-
-	/* PtgRange */
-	out.write_shift(1, 0x11);
-
-	out.write_shift(4, 0);
-
-	return out;
-}
-
-/* Writes a range with explicit sheet name [PtgArea3d] */
-function write_XLSBFormulaArea3D(_str, wb) {
-	var lastbang = _str.lastIndexOf("!");
-	var sname = _str.slice(0, lastbang);
-	_str = _str.slice(lastbang+1);
-	if(sname.charAt(0) == "'") sname = sname.slice(1, -1).replace(/''/g, "'");
-	var range = decode_range(_str);
-
-	var out = new_buf(23);
-	out.write_shift(4, 15);
-
-	out.write_shift(1, 0x1B | ((1)<<5));
-	out.write_shift(2, 2 + wb.SheetNames.map(function(n) { return n.toLowerCase(); }).indexOf(sname.toLowerCase()));
-	out.write_shift(4, range.s.r);
-	out.write_shift(4, range.e.r);
-	out.write_shift(2, range.s.c);
-	out.write_shift(2, range.e.c);
-
-	out.write_shift(4, 0);
-
-	return out;
-}
-
-
-/* General Formula */
-function write_XLSBFormula(val/*:string|number*/, wb) {
-	if(typeof val == "number") return write_XLSBFormulaNum(val);
-	if(typeof val == "boolean") return write_XLSBFormulaBool(val);
-	if(/^#(DIV\/0!|GETTING_DATA|N\/A|NAME\?|NULL!|NUM!|REF!|VALUE!)$/.test(val)) return write_XLSBFormulaErr(+RBErr[val]);
-	if(val.match(/^\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})$/)) return write_XLSBFormulaRef(val);
-	if(val.match(/^\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5}):\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})$/)) return write_XLSBFormulaRange(val);
-	if(val.match(/^#REF!\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5}):\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})$/)) return write_XLSBFormulaArea3D(val, wb);
-	if(val.match(/^(?:'[^\\\/?*\[\]:]*'|[^'][^\\\/?*\[\]:'`~!@#$%^()\-=+{}|;,<.>]*)!\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})$/)) return write_XLSBFormulaRef3D(val, wb);
-	if(val.match(/^(?:'[^\\\/?*\[\]:]*'|[^'][^\\\/?*\[\]:'`~!@#$%^()\-=+{}|;,<.>]*)!\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5}):\$?(?:[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D]|[A-Z]{1,2})\$?(?:10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})$/)) return write_XLSBFormulaRangeWS(val, wb);
-	if(/^(?:'[^\\\/?*\[\]:]*'|[^'][^\\\/?*\[\]:'`~!@#$%^()\-=+{}|;,<.>]*)!#REF!$/.test(val)) return write_XLSBFormulaRefErr3D(val, wb);
-	if(/^".*"$/.test(val)) return write_XLSBFormulaStr(val);
-	if(/^[+-]\d+$/.test(val)) return write_XLSBFormulaNum(parseInt(val, 10));
-	throw "Formula |" + val + "| not supported for XLSB";
-}
-var write_XLSBNameParsedFormula = write_XLSBFormula;
--- a/bits/65_fods.js
+++ b/bits/65_fods.js
@ -9,8 +9,6 @@ function ods_to_csf_formula(f/*:string*/)/*:string*/ {
 	f = f.replace(/COM\.MICROSOFT\./g, "");
 	/* Part 3 Section 5.8 References */
 	f = f.replace(/\[((?:\.[A-Z]+[0-9]+)(?::\.[A-Z]+[0-9]+)?)\]/g, function($$, $1) { return $1.replace(/\./g,""); });
-	f = f.replace(/\$'([^']|'')+'/g, function($$) { return $$.slice(1); });
-	f = f.replace(/\$([^\]\. #$]+)/g, function($$, $1) { return ($1).match(/^([A-Z]{1,2}|[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D])?(10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})?$/) ? $$ : $1; });
 	/* TODO: something other than this */
 	f = f.replace(/\[.(#[A-Z]*[?!])\]/g, "$1");
 	return f.replace(/[;~]/g,",").replace(/\|/g,";");
@ -23,14 +21,12 @@ function csf_to_ods_formula(f/*:string*/)/*:string*/ {
 }

 function ods_to_csf_3D(r/*:string*/)/*:[string, string]*/ {
-	r = r.replace(/\$'([^']|'')+'/g, function($$) { return $$.slice(1); });
-	r = r.replace(/\$([^\]\. #$]+)/g, function($$, $1) { return ($1).match(/^([A-Z]{1,2}|[A-W][A-Z]{2}|X[A-E][A-Z]|XF[A-D])?(10[0-3]\d{4}|104[0-7]\d{3}|1048[0-4]\d{2}|10485[0-6]\d|104857[0-6]|[1-9]\d{0,5})?$/) ? $$ : $1; });
 	var a = r.split(":");
 	var s = a[0].split(".")[0];
 	return [s, a[0].split(".")[1] + (a.length > 1 ? (":" + (a[1].split(".")[1] || a[1].split(".")[0])) : "")];
 }

 function csf_to_ods_3D(r/*:string*/)/*:string*/ {
-	return r.replace(/!/,".").replace(/:/, ":.");
+	return r.replace(/\./,"!");
 }

--- a/bits/66_wscommon.js
+++ b/bits/66_wscommon.js
@ -62,7 +62,7 @@ function get_cell_style(styles/*:Array<any>*/, cell/*:Cell*/, opts) {
 	var i = 0x3c, len = styles.length;
 	if(z == null && opts.ssf) {
 		for(; i < 0x188; ++i) if(opts.ssf[i] == null) {
-			SSF__load(cell.z, i);
+			SSF_load(cell.z, i);
 			// $FlowIgnore
 			opts.ssf[i] = cell.z;
 			opts.revssf[cell.z] = z = i;
@ -81,14 +81,14 @@ function get_cell_style(styles/*:Array<any>*/, cell/*:Cell*/, opts) {
 	return len;
 }

-function safe_format(p/*:Cell*/, fmtid/*:number*/, fillid/*:?number*/, opts, themes, styles, date1904) {
+function safe_format(p/*:Cell*/, fmtid/*:number*/, fillid/*:?number*/, opts, themes, styles) {
 	try {
 		if(opts.cellNF) p.z = table_fmt[fmtid];
 	} catch(e) { if(opts.WTF) throw e; }
 	if(p.t === 'z' && !opts.cellStyles) return;
 	if(p.t === 'd' && typeof p.v === 'string') p.v = parseDate(p.v);
 	if((!opts || opts.cellText !== false) && p.t !== 'z') try {
-		if(table_fmt[fmtid] == null) SSF__load(SSFImplicit[fmtid] || "General", fmtid);
+		if(table_fmt[fmtid] == null) SSF_load(SSFImplicit[fmtid] || "General", fmtid);
 		if(p.t === 'e') p.w = p.w || BErr[p.v];
 		else if(fmtid === 0) {
 			if(p.t === 'n') {
@ -96,14 +96,14 @@ function safe_format(p/*:Cell*/, fmtid/*:number*/, fillid/*:?number*/, opts, the
 				else p.w = SSF_general_num(p.v);
 			}
 			else if(p.t === 'd') {
-				var dd = datenum(p.v, !!date1904);
+				var dd = datenum(p.v);
 				if((dd|0) === dd) p.w = dd.toString(10);
 				else p.w = SSF_general_num(dd);
 			}
 			else if(p.v === undefined) return "";
 			else p.w = SSF_general(p.v,_ssfopts);
 		}
-		else if(p.t === 'd') p.w = SSF_format(fmtid,datenum(p.v, !!date1904),_ssfopts);
+		else if(p.t === 'd') p.w = SSF_format(fmtid,datenum(p.v),_ssfopts);
 		else p.w = SSF_format(fmtid,p.v,_ssfopts);
 	} catch(e) { if(opts.WTF) throw e; }
 	if(!opts.cellStyles) return;
--- a/bits/67_wsxml.js
+++ b/bits/67_wsxml.js
@ -2,13 +2,16 @@ function parse_ws_xml_dim(ws/*:Worksheet*/, s/*:string*/) {
 	var d = safe_decode_range(s);
 	if(d.s.r<=d.e.r && d.s.c<=d.e.c && d.s.r>=0 && d.s.c>=0) ws["!ref"] = encode_range(d);
 }
-var mergecregex = /<(?:\w+:)?mergeCell ref=["'][A-Z0-9:]+['"]\s*[\/]?>/g;
-var hlinkregex = /<(?:\w+:)?hyperlink [^<>]*>/mg;
+var mergecregex = /<(?:\w:)?mergeCell ref="[A-Z0-9:]+"\s*[\/]?>/g;
+var sheetdataregex = /<(?:\w+:)?sheetData[^>]*>([\s\S]*)<\/(?:\w+:)?sheetData>/;
+var hlinkregex = /<(?:\w:)?hyperlink [^>]*>/mg;
 var dimregex = /"(\w*:\w*)"/;
-var colregex = /<(?:\w+:)?col\b[^<>]*[\/]?>/g;
-var afregex = /<(?:\w+:)?autoFilter[^>]*/g;
-var marginregex= /<(?:\w+:)?pageMargins[^<>]*\/>/g;
-var sheetprregex = /<(?:\w+:)?sheetPr\b[^<>]*?\/>/;
+var colregex = /<(?:\w:)?col\b[^>]*[\/]?>/g;
+var afregex = /<(?:\w:)?autoFilter[^>]*([\/]|>([\s\S]*)<\/(?:\w:)?autoFilter)>/g;
+var marginregex= /<(?:\w:)?pageMargins[^>]*\/>/g;
+var sheetprregex = /<(?:\w:)?sheetPr\b(?:[^>a-z][^>]*)?\/>/;
+var sheetprregex2= /<(?:\w:)?sheetPr[^>]*(?:[\/]|>([\s\S]*)<\/(?:\w:)?sheetPr)>/;
+var svsregex = /<(?:\w:)?sheetViews[^>]*(?:[\/]|>([\s\S]*)<\/(?:\w:)?sheetViews)>/;

 /* 18.3 Worksheets */
 function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBProps*/, themes, styles)/*:Worksheet*/ {
@ -17,11 +20,11 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	if(DENSE != null && opts.dense == null) opts.dense = DENSE;

 	/* 18.3.1.99 worksheet CT_Worksheet */
-	var s = ({}/*:any*/); if(opts.dense) s["!data"] = [];
+	var s = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
 	var refguess/*:Range*/ = ({s: {r:2000000, c:2000000}, e: {r:0, c:0} }/*:any*/);

 	var data1 = "", data2 = "";
-	var mtch/*:?any*/ = str_match_xml_ns(data, "sheetData");
+	var mtch/*:?any*/ = data.match(sheetdataregex);
 	if(mtch) {
 		data1 = data.slice(0, mtch.index);
 		data2 = data.slice(mtch.index + mtch[0].length);
@ -30,17 +33,17 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	/* 18.3.1.82 sheetPr CT_SheetPr */
 	var sheetPr = data1.match(sheetprregex);
 	if(sheetPr) parse_ws_xml_sheetpr(sheetPr[0], s, wb, idx);
-	else if((sheetPr = str_match_xml_ns(data1, "sheetPr"))) parse_ws_xml_sheetpr2(sheetPr[0], sheetPr[1]||"", s, wb, idx, styles, themes);
+	else if((sheetPr = data1.match(sheetprregex2))) parse_ws_xml_sheetpr2(sheetPr[0], sheetPr[1]||"", s, wb, idx, styles, themes);

 	/* 18.3.1.35 dimension CT_SheetDimension */
 	var ridx = (data1.match(/<(?:\w*:)?dimension/)||{index:-1}).index;
 	if(ridx > 0) {
 		var ref = data1.slice(ridx,ridx+50).match(dimregex);
-		if(ref && !(opts && opts.nodim)) parse_ws_xml_dim(s, ref[1]);
+		if(ref) parse_ws_xml_dim(s, ref[1]);
 	}

 	/* 18.3.1.88 sheetViews CT_SheetViews */
-	var svs = str_match_xml_ns(data1, "sheetViews");
+	var svs = data1.match(svsregex);
 	if(svs && svs[1]) parse_ws_xml_sheetviews(svs[1], wb);

 	/* 18.3.1.17 cols CT_Cols */
@ -52,7 +55,7 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	}

 	/* 18.3.1.80 sheetData CT_SheetData ? */
-	if(mtch) parse_ws_xml_data(mtch[1], s, opts, refguess, themes, styles, wb);
+	if(mtch) parse_ws_xml_data(mtch[1], s, opts, refguess, themes, styles);

 	/* 18.3.1.2  autoFilter CT_AutoFilter */
 	var afilter = data2.match(afregex);
@ -72,11 +75,6 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	var margins = data2.match(marginregex);
 	if(margins) s['!margins'] = parse_ws_xml_margins(parsexmltag(margins[0]));

-	/* legacyDrawing */
-	var m;
-	if((m = data2.match(/legacyDrawing r:id="(.*?)"/))) s['!legrel'] = m[1];
-
-	if(opts && opts.nodim) refguess.s.c = refguess.s.r = 0;
 	if(!s["!ref"] && refguess.e.c >= refguess.s.c && refguess.e.r >= refguess.s.r) s["!ref"] = encode_range(refguess);
 	if(opts.sheetRows > 0 && s["!ref"]) {
 		var tmpref = safe_decode_range(s["!ref"]);
@ -92,7 +90,6 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	}
 	if(columns.length > 0) s["!cols"] = columns;
 	if(merges.length > 0) s["!merges"] = merges;
-	if(rels['!id'][s['!legrel']]) s['!legdrawel'] = rels['!id'][s['!legrel']];
 	return s;
 }

@ -152,7 +149,7 @@ function write_ws_xml_protection(sp)/*:string*/ {
 }

 function parse_ws_xml_hlinks(s, data/*:Array<string>*/, rels) {
-	var dense = s["!data"] != null;
+	var dense = Array.isArray(s);
 	for(var i = 0; i != data.length; ++i) {
 		var val = parsexmltag(utf8read(data[i]), true);
 		if(!val.ref) return;
@ -168,11 +165,11 @@ function parse_ws_xml_hlinks(s, data/*:Array<string>*/, rels) {
 		if(val.tooltip) { val.Tooltip = val.tooltip; delete val.tooltip; }
 		var rng = safe_decode_range(val.ref);
 		for(var R=rng.s.r;R<=rng.e.r;++R) for(var C=rng.s.c;C<=rng.e.c;++C) {
-			var addr = encode_col(C) + encode_row(R);
+			var addr = encode_cell({c:C,r:R});
 			if(dense) {
-				if(!s["!data"][R]) s["!data"][R] = [];
-				if(!s["!data"][R][C]) s["!data"][R][C] = {t:"z",v:undefined};
-				s["!data"][R][C].l = val;
+				if(!s[R]) s[R] = [];
+				if(!s[R][C]) s[R][C] = {t:"z",v:undefined};
+				s[R][C].l = val;
 			} else {
 				if(!s[addr]) s[addr] = {t:"z",v:undefined};
 				s[addr].l = val;
@ -231,7 +228,7 @@ function write_ws_xml_autofilter(data, ws, wb, idx)/*:string*/ {
 		var name = names[i];
 		if(name.Name != '_xlnm._FilterDatabase') continue;
 		if(name.Sheet != idx) continue;
-		name.Ref = formula_quote_sheet_name(wb.SheetNames[idx]) + "!" + fix_range(ref); break;
+		name.Ref = "'" + wb.SheetNames[idx] + "'!" + ref; break;
 	}
 	if(i == names.length) names.push({ Name: '_xlnm._FilterDatabase', Sheet: idx, Ref: "'" + wb.SheetNames[idx] + "'!" + ref  });
 	return writextag("autoFilter", null, {ref:ref});
@ -239,7 +236,7 @@ function write_ws_xml_autofilter(data, ws, wb, idx)/*:string*/ {

 /* 18.3.1.88 sheetViews CT_SheetViews */
 /* 18.3.1.87 sheetView CT_SheetView */
-var sviewregex = /<(?:\w:)?sheetView(?:[^<>a-z][^<>]*)?\/?>/g;
+var sviewregex = /<(?:\w:)?sheetView(?:[^>a-z][^>]*)?\/?>/;
 function parse_ws_xml_sheetviews(data, wb/*:WBWBProps*/) {
 	if(!wb.Views) wb.Views = [{}];
 	(data.match(sviewregex)||[]).forEach(function(r/*:string*/, i/*:number*/) {
@ -249,7 +246,7 @@ function parse_ws_xml_sheetviews(data, wb/*:WBWBProps*/) {
 		// $FlowIgnore
 		if(+tag.zoomScale) wb.Views[i].zoom = +tag.zoomScale;
 		// $FlowIgnore
-		if(tag.rightToLeft && parsexmlbool(tag.rightToLeft)) wb.Views[i].RTL = true;
+		if(parsexmlbool(tag.rightToLeft)) wb.Views[i].RTL = true;
 	});
 }
 function write_ws_xml_sheetviews(ws, opts, idx, wb)/*:string*/ {
@ -259,33 +256,27 @@ function write_ws_xml_sheetviews(ws, opts, idx, wb)/*:string*/ {
 	return writextag("sheetViews", writextag("sheetView", null, sview), {});
 }

-function write_ws_xml_cell(cell/*:Cell*/, ref, ws, opts, idx, wb, date1904)/*:string*/ {
+function write_ws_xml_cell(cell/*:Cell*/, ref, ws, opts/*::, idx, wb*/)/*:string*/ {
 	if(cell.c) ws['!comments'].push([ref, cell.c]);
-	if((cell.v === undefined || cell.t === "z" && !(opts||{}).sheetStubs) && typeof cell.f !== "string" && typeof cell.z == "undefined") return "";
+	if(cell.v === undefined && typeof cell.f !== "string" || cell.t === 'z' && !cell.f) return "";
 	var vv = "";
 	var oldt = cell.t, oldv = cell.v;
 	if(cell.t !== "z") switch(cell.t) {
 		case 'b': vv = cell.v ? "1" : "0"; break;
-		case 'n':
-			if(isNaN(cell.v)) { cell.t = "e"; vv = BErr[cell.v = 0x24]; } // #NUM!
-			else if(!isFinite(cell.v)) { cell.t = "e"; vv = BErr[cell.v = 0x07]; } // #DIV/0!
-			else vv = ''+cell.v; break;
+		case 'n': vv = ''+cell.v; break;
 		case 'e': vv = BErr[cell.v]; break;
 		case 'd':
-			if(opts && opts.cellDates) {
-				var _vv = parseDate(cell.v, date1904);
-				vv = _vv.toISOString();
-				if(_vv.getUTCFullYear() < 1900) vv = vv.slice(vv.indexOf("T") + 1).replace("Z","");
-			} else {
+			if(opts && opts.cellDates) vv = parseDate(cell.v, -1).toISOString();
+			else {
 				cell = dup(cell);
 				cell.t = 'n';
-				vv = ''+(cell.v = datenum(parseDate(cell.v, date1904), date1904));
+				vv = ''+(cell.v = datenum(parseDate(cell.v)));
 			}
 			if(typeof cell.z === 'undefined') cell.z = table_fmt[14];
 			break;
 		default: vv = cell.v; break;
 	}
-	var v = (cell.t == "z" || cell.v == null)? "" : writetag('v', escapexml(vv)), o = ({r:ref}/*:any*/);
+	var v = writetag('v', escapexml(vv)), o = ({r:ref}/*:any*/);
 	/* TODO: cell style */
 	var os = get_cell_style(opts.cellXfs, cell, opts);
 	if(os !== 0) o.s = os;
@ -301,27 +292,25 @@ function write_ws_xml_cell(cell/*:Cell*/, ref, ws, opts, idx, wb, date1904)/*:st
 				v = writetag('v', ''+get_sst_id(opts.Strings, cell.v, opts.revStrings));
 				o.t = "s"; break;
 			}
-			else o.t = "str"; break;
+			o.t = "str"; break;
 	}
 	if(cell.t != oldt) { cell.t = oldt; cell.v = oldv; }
 	if(typeof cell.f == "string" && cell.f) {
 		var ff = cell.F && cell.F.slice(0, ref.length) == ref ? {t:"array", ref:cell.F} : null;
 		v = writextag('f', escapexml(cell.f), ff) + (cell.v != null ? v : "");
 	}
-	if(cell.l) {
-		cell.l.display = escapexml(vv);
-		ws['!links'].push([ref, cell.l]);
-	}
+	if(cell.l) ws['!links'].push([ref, cell.l]);
 	if(cell.D) o.cm = 1;
 	return writextag('c', v, o);
 }

 var parse_ws_xml_data = /*#__PURE__*/(function() {
 	var cellregex = /<(?:\w+:)?c[ \/>]/, rowregex = /<\/(?:\w+:)?row>/;
-	var rregex = /r=["']([^"']*)["']/;
+	var rregex = /r=["']([^"']*)["']/, isregex = /<(?:\w+:)?is>([\S\s]*?)<\/(?:\w+:)?is>/;
 	var refregex = /ref=["']([^"']*)["']/;
+	var match_v = matchtag("v"), match_f = matchtag("f");

-return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, themes, styles, wb) {
+return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, themes, styles) {
 	var ri = 0, x = "", cells/*:Array<string>*/ = [], cref/*:?Array<string>*/ = [], idx=0, i=0, cc=0, d="", p/*:any*/;
 	var tag, tagr = 0, tagc = 0;
 	var sstr, ftag;
@ -329,10 +318,9 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 	var do_format = Array.isArray(styles.CellXf), cf;
 	var arrayf/*:Array<[Range, string]>*/ = [];
 	var sharedf = [];
-	var dense = s["!data"] != null;
+	var dense = Array.isArray(s);
 	var rows/*:Array<RowInfo>*/ = [], rowobj = {}, rowrite = false;
 	var sheetStubs = !!opts.sheetStubs;
-	var date1904 = !!((wb||{}).WBProps||{}).date1904;
 	for(var marr = sdata.split(rowregex), mt = 0, marrlen = marr.length; mt != marrlen; ++mt) {
 		x = marr[mt].trim();
 		var xlen = x.length;
@ -350,7 +338,7 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 					if(opts.sheetRows && opts.sheetRows < tagr) continue;
 					rowobj = {}; rowrite = false;
 					if(tag.ht) { rowrite = true; rowobj.hpt = parseFloat(tag.ht); rowobj.hpx = pt2px(rowobj.hpt); }
-					if(tag.hidden && parsexmlbool(tag.hidden)) { rowrite = true; rowobj.hidden = true; }
+					if(tag.hidden == "1") { rowrite = true; rowobj.hidden = true; }
 					if(tag.outlineLevel != null) { rowrite = true; rowobj.level = +tag.outlineLevel; }
 					if(rowrite) rows[tagr-1] = rowobj;
 				}
@ -361,15 +349,13 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 		tag = parsexmltag(x.slice(rstarti,ri), true);
 		tagr = tag.r != null ? parseInt(tag.r, 10) : tagr+1; tagc = -1;
 		if(opts.sheetRows && opts.sheetRows < tagr) continue;
-		if(!opts.nodim) {
-			if(guess.s.r > tagr - 1) guess.s.r = tagr - 1;
-			if(guess.e.r < tagr - 1) guess.e.r = tagr - 1;
-		}
+		if(guess.s.r > tagr - 1) guess.s.r = tagr - 1;
+		if(guess.e.r < tagr - 1) guess.e.r = tagr - 1;

 		if(opts && opts.cellStyles) {
 			rowobj = {}; rowrite = false;
 			if(tag.ht) { rowrite = true; rowobj.hpt = parseFloat(tag.ht); rowobj.hpx = pt2px(rowobj.hpt); }
-			if(tag.hidden && parsexmlbool(tag.hidden)) { rowrite = true; rowobj.hidden = true; }
+			if(tag.hidden == "1") { rowrite = true; rowobj.hidden = true; }
 			if(tag.outlineLevel != null) { rowrite = true; rowobj.level = +tag.outlineLevel; }
 			if(rowrite) rows[tagr-1] = rowobj;
 		}
@ -398,31 +384,23 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 			d = x.slice(i);
 			p = ({t:""}/*:any*/);

-			if((cref=str_match_xml_ns(d, "v"))!= null && /*::cref != null && */cref[1] !== '') p.v=unescapexml(cref[1]);
+			if((cref=d.match(match_v))!= null && /*::cref != null && */cref[1] !== '') p.v=unescapexml(cref[1]);
 			if(opts.cellFormula) {
-				if((cref=str_match_xml_ns(d, "f"))!= null /*:: && cref != null*/) {
-					if(cref[1] == "") {
-						if(/*::cref != null && cref[0] != null && */cref[0].indexOf('t="shared"') > -1) {
-							// TODO: parse formula
-							ftag = parsexmltag(cref[0]);
-							if(sharedf[ftag.si]) p.f = shift_formula_xlsx(sharedf[ftag.si][1], sharedf[ftag.si][2]/*[0].ref*/, tag.r);
-						}
-					} else {
-						/* TODO: match against XLSXFutureFunctions */
-						p.f=unescapexml(utf8read(cref[1]), true);
-						if(!opts.xlfn) p.f = _xlfn(p.f);
-						if(/*::cref != null && cref[0] != null && */cref[0].indexOf('t="array"') > -1) {
-							p.F = (d.match(refregex)||[])[1];
-							if(p.F.indexOf(":") > -1) arrayf.push([safe_decode_range(p.F), p.F]);
-						} else if(/*::cref != null && cref[0] != null && */cref[0].indexOf('t="shared"') > -1) {
-							// TODO: parse formula
-							ftag = parsexmltag(cref[0]);
-							var ___f = unescapexml(utf8read(cref[1]));
-							if(!opts.xlfn) ___f = _xlfn(___f);
-							sharedf[parseInt(ftag.si, 10)] = [ftag, ___f, tag.r];
-						}
+				if((cref=d.match(match_f))!= null && /*::cref != null && */cref[1] !== '') {
+					/* TODO: match against XLSXFutureFunctions */
+					p.f=unescapexml(utf8read(cref[1])).replace(/\r\n/g, "\n");
+					if(!opts.xlfn) p.f = _xlfn(p.f);
+					if(/*::cref != null && cref[0] != null && */cref[0].indexOf('t="array"') > -1) {
+						p.F = (d.match(refregex)||[])[1];
+						if(p.F.indexOf(":") > -1) arrayf.push([safe_decode_range(p.F), p.F]);
+					} else if(/*::cref != null && cref[0] != null && */cref[0].indexOf('t="shared"') > -1) {
+						// TODO: parse formula
+						ftag = parsexmltag(cref[0]);
+						var ___f = unescapexml(utf8read(cref[1]));
+						if(!opts.xlfn) ___f = _xlfn(___f);
+						sharedf[parseInt(ftag.si, 10)] = [ftag, ___f, tag.r];
 					}
-				} else if((cref=d.match(/<f[^<>]*\/>/))) {
+				} else if((cref=d.match(/<f[^>]*\/>/))) {
 					ftag = parsexmltag(cref[0]);
 					if(sharedf[ftag.si]) p.f = shift_formula_xlsx(sharedf[ftag.si][1], sharedf[ftag.si][2]/*[0].ref*/, tag.r);
 				}
@ -464,11 +442,11 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 					break;
 				case 'str':
 					p.t = "s";
-					p.v = (p.v!=null) ? unescapexml(utf8read(p.v), true) : '';
+					p.v = (p.v!=null) ? utf8read(p.v) : '';
 					if(opts.cellHTML) p.h = escapehtml(p.v);
 					break;
 				case 'inlineStr':
-					cref = str_match_xml_ns(d, "is");
+					cref = d.match(isregex);
 					p.t = 's';
 					if(cref != null && (sstr = parse_si(cref[1]))) {
 						p.v = sstr.t;
@ -477,8 +455,8 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 					break;
 				case 'b': p.v = parsexmlbool(p.v); break;
 				case 'd':
-					if(opts.cellDates) p.v = parseDate(p.v, date1904);
-					else { p.v = datenum(parseDate(p.v, date1904), date1904); p.t = 'n'; }
+					if(opts.cellDates) p.v = parseDate(p.v, 1);
+					else { p.v = datenum(parseDate(p.v, 1)); p.t = 'n'; }
 					break;
 				/* error string in .w, number in .v */
 				case 'e':
@ -497,22 +475,16 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 					}
 				}
 			}
-			safe_format(p, fmtid, fillid, opts, themes, styles, date1904);
-			if(opts.cellDates && do_format && p.t == 'n' && fmt_is_date(table_fmt[fmtid])) { p.v = numdate(p.v + (date1904 ? 1462 : 0)); p.t = typeof p.v == "number" ? 'n' : 'd'; }
+			safe_format(p, fmtid, fillid, opts, themes, styles);
+			if(opts.cellDates && do_format && p.t == 'n' && fmt_is_date(table_fmt[fmtid])) { p.t = 'd'; p.v = numdate(p.v); }
 			if(tag.cm && opts.xlmeta) {
 				var cm = (opts.xlmeta.Cell||[])[+tag.cm-1];
 				if(cm && cm.type == 'XLDAPR') p.D = true;
 			}
-			var _r;
-			if(opts.nodim) {
-				_r = decode_cell(tag.r);
-				if(guess.s.r > _r.r) guess.s.r = _r.r;
-				if(guess.e.r < _r.r) guess.e.r = _r.r;
-			}
 			if(dense) {
-				_r = decode_cell(tag.r);
-				if(!s["!data"][_r.r]) s["!data"][_r.r] = [];
-				s["!data"][_r.r][_r.c] = p;
+				var _r = decode_cell(tag.r);
+				if(!s[_r.r]) s[_r.r] = [];
+				s[_r.r][_r.c] = p;
 			} else s[tag.r] = p;
 		}
 	}
@ -521,18 +493,17 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th

 function write_ws_xml_data(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbook*//*::, rels*/)/*:string*/ {
 	var o/*:Array<string>*/ = [], r/*:Array<string>*/ = [], range = safe_decode_range(ws['!ref']), cell="", ref, rr = "", cols/*:Array<string>*/ = [], R=0, C=0, rows = ws['!rows'];
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	var params = ({r:rr}/*:any*/), row/*:RowInfo*/, height = -1;
-	var date1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;
 	for(C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
 	for(R = range.s.r; R <= range.e.r; ++R) {
 		r = [];
 		rr = encode_row(R);
 		for(C = range.s.c; C <= range.e.c; ++C) {
 			ref = cols[C] + rr;
-			var _cell = dense ? (ws["!data"][R]||[])[C]: ws[ref];
+			var _cell = dense ? (ws[R]||[])[C]: ws[ref];
 			if(_cell === undefined) continue;
-			if((cell = write_ws_xml_cell(_cell, ref, ws, opts, idx, wb, date1904)) != null) r.push(cell);
+			if((cell = write_ws_xml_cell(_cell, ref, ws, opts, idx, wb)) != null) r.push(cell);
 		}
 		if(r.length > 0 || (rows && rows[R])) {
 			params = ({r:rr}/*:any*/);
@ -633,12 +604,11 @@ function write_ws_xml(idx/*:number*/, opts, wb/*:Workbook*/, rels)/*:string*/ {
 			if(!l[1].Target) return;
 			rel = ({"ref":l[0]}/*:any*/);
 			if(l[1].Target.charAt(0) != "#") {
-				rId = add_rels(rels, -1, escapexml(l[1].Target).replace(/#[\s\S]*$/, ""), RELS.HLINK);
+				rId = add_rels(rels, -1, escapexml(l[1].Target).replace(/#.*$/, ""), RELS.HLINK);
 				rel["r:id"] = "rId"+rId;
 			}
 			if((relc = l[1].Target.indexOf("#")) > -1) rel.location = escapexml(l[1].Target.slice(relc+1));
 			if(l[1].Tooltip) rel.tooltip = escapexml(l[1].Tooltip);
-			rel.display = l[1].display;
 			o[o.length] = writextag("hyperlink",null,rel);
 		});
 		o[o.length] = "</hyperlinks>";
--- a/bits/68_wsbin.js
+++ b/bits/68_wsbin.js
@ -41,13 +41,12 @@ function write_BrtRowHdr(R/*:number*/, range, ws) {
 	o.l += 4;

 	var caddr = {r:R, c:0};
-	var dense = ws["!data"] != null;
 	for(var i = 0; i < 16; ++i) {
 		if((range.s.c > ((i+1) << 10)) || (range.e.c < (i << 10))) continue;
 		var first = -1, last = -1;
 		for(var j = (i<<10); j < ((i+1)<<10); ++j) {
 			caddr.c = j;
-			var cell = dense ? (ws["!data"][caddr.r]||[])[caddr.c] : ws[encode_cell(caddr)];
+			var cell = Array.isArray(ws) ? (ws[caddr.r]||[])[caddr.c] : ws[encode_cell(caddr)];
 			if(cell) { if(first < 0) first = j; last = j; }
 		}
 		if(first < 0) continue;
@ -259,10 +258,9 @@ function parse_BrtCellSt(data) {
 	return [cell, value, 'str'];
 }
 function write_BrtCellSt(cell, ncell, o) {
-	var data = cell.v == null ? "" : String(cell.v);
 	if(o == null) o = new_buf(12 + 4 * cell.v.length);
 	write_XLSBCell(ncell, o);
-	write_XLWideString(data, o);
+	write_XLWideString(cell.v, o);
 	return o.length > o.l ? o.slice(0, o.l) : o;
 }
 function parse_BrtShortSt(data) {
@ -271,10 +269,9 @@ function parse_BrtShortSt(data) {
 	return [cell, value, 'str'];
 }
 function write_BrtShortSt(cell, ncell, o) {
-	var data = cell.v == null ? "" : String(cell.v);
-	if(o == null) o = new_buf(8 + 4 * data.length);
+	if(o == null) o = new_buf(8 + 4 * cell.v.length);
 	write_XLSBShortCell(ncell, o);
-	write_XLWideString(data, o);
+	write_XLWideString(cell.v, o);
 	return o.length > o.l ? o.slice(0, o.l) : o;
 }

@ -511,7 +508,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 	var opts = _opts || {};
 	if(!rels) rels = {'!id':{}};
 	if(DENSE != null && opts.dense == null) opts.dense = DENSE;
-	var s/*:Worksheet*/ = ({}); if(opts.dense) s["!data"] = [];
+	var s/*:Worksheet*/ = (opts.dense ? [] : {});

 	var ref;
 	var refguess = {s: {r:2000000, c:2000000}, e: {r:0, c:0} };
@ -542,7 +539,6 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 	XLSBRecordEnum[0x0010] = { n:"BrtShortReal", f:parse_BrtShortReal };

 	var cm, vm;
-	var date1904 = 1462 * +!!((wb||{}).WBProps||{}).date1904;

 	recordhopper(data, function ws_parse(val, RR, RT) {
 		if(end) return;
@ -586,9 +582,9 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 					case 'str': p.t = 's'; p.v = val[1]; break;
 					case 'is': p.t = 's'; p.v = val[1].t; break;
 				}
-				if((cf = styles.CellXf[val[0].iStyleRef])) safe_format(p,cf.numFmtId,null,opts, themes, styles, date1904>0);
+				if((cf = styles.CellXf[val[0].iStyleRef])) safe_format(p,cf.numFmtId,null,opts, themes, styles);
 				C = val[0].c == -1 ? C + 1 : val[0].c;
-				if(opts.dense) { if(!s["!data"][R]) s["!data"][R] = []; s["!data"][R][C] = p; }
+				if(opts.dense) { if(!s[R]) s[R] = []; s[R][C] = p; }
 				else s[encode_col(C) + rr] = p;
 				if(opts.cellFormula) {
 					af = false;
@ -607,7 +603,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 				if(refguess.e.r < row.r) refguess.e.r = row.r;
 				if(refguess.e.c < C) refguess.e.c = C;
 				if(opts.cellDates && cf && p.t == 'n' && fmt_is_date(table_fmt[cf.numFmtId])) {
-					var _d = SSF_parse_date_code(p.v + date1904); if(_d) { p.t = 'd'; p.v = new Date(Date.UTC(_d.y, _d.m-1,_d.d,_d.H,_d.M,_d.S,_d.u)); }
+					var _d = SSF_parse_date_code(p.v); if(_d) { p.t = 'd'; p.v = new Date(_d.y, _d.m-1,_d.d,_d.H,_d.M,_d.S,_d.u); }
 				}
 				if(cm) {
 					if(cm.type == 'XLDAPR') p.D = true;
@ -621,7 +617,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 				if(!opts.sheetStubs || pass) break;
 				p = ({t:'z',v:void 0}/*:any*/);
 				C = val[0].c == -1 ? C + 1 : val[0].c;
-				if(opts.dense) { if(!s["!data"][R]) s["!data"][R] = []; s["!data"][R][C] = p; }
+				if(opts.dense) { if(!s[R]) s[R] = []; s[R][C] = p; }
 				else s[encode_col(C) + rr] = p;
 				if(refguess.s.r > row.r) refguess.s.r = row.r;
 				if(refguess.s.c > C) refguess.s.c = C;
@ -652,11 +648,11 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 				}
 				for(R=val.rfx.s.r;R<=val.rfx.e.r;++R) for(C=val.rfx.s.c;C<=val.rfx.e.c;++C) {
 					if(opts.dense) {
-						if(!s["!data"][R]) s["!data"][R] = [];
-						if(!s["!data"][R][C]) s["!data"][R][C] = {t:'z',v:undefined};
-						s["!data"][R][C].l = val;
+						if(!s[R]) s[R] = [];
+						if(!s[R][C]) s[R][C] = {t:'z',v:undefined};
+						s[R][C].l = val;
 					} else {
-						addr = encode_col(C) + encode_row(R);
+						addr = encode_cell({c:C,r:R});
 						if(!s[addr]) s[addr] = {t:'z',v:undefined};
 						s[addr].l = val;
 					}
@ -666,14 +662,14 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 			case 0x01AA: /* 'BrtArrFmla' */
 				if(!opts.cellFormula) break;
 				arrayf.push(val);
-				cell = ((opts.dense ? s["!data"][R][C] : s[encode_col(C) + rr])/*:any*/);
+				cell = ((opts.dense ? s[R][C] : s[encode_col(C) + rr])/*:any*/);
 				cell.f = stringify_formula(val[1], refguess, {r:row.r, c:C}, supbooks, opts);
 				cell.F = encode_range(val[0]);
 				break;
 			case 0x01AB: /* 'BrtShrFmla' */
 				if(!opts.cellFormula) break;
 				sharedf[encode_cell(val[0].s)] = val[1];
-				cell = (opts.dense ? s["!data"][R][C] : s[encode_col(C) + rr]);
+				cell = (opts.dense ? s[R][C] : s[encode_col(C) + rr]);
 				cell.f = stringify_formula(val[1], refguess, {r:row.r, c:C}, supbooks, opts);
 				break;

@ -687,10 +683,6 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 				}
 				break;

-			case 0x0227: /* 'BrtLegacyDrawing' */
-				if(val) s["!legrel"] = val;
-				break;
-
 			case 0x00A1: /* 'BrtBeginAFilter' */
 				s['!autofilter'] = { ref:encode_range(val) };
 				break;
@ -747,6 +739,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 			case 0x0499: /* 'BrtFilter14' */
 			case 0x00A9: /* 'BrtIconFilter' */
 			case 0x049D: /* 'BrtIconFilter14' */
+			case 0x0227: /* 'BrtLegacyDrawing' */
 			case 0x0228: /* 'BrtLegacyDrawingHF' */
 			case 0x0295: /* 'BrtListPart' */
 			case 0x027F: /* 'BrtOleObject' */
@ -805,14 +798,11 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 	if(merges.length > 0) s["!merges"] = merges;
 	if(colinfo.length > 0) s["!cols"] = colinfo;
 	if(rowinfo.length > 0) s["!rows"] = rowinfo;
-	if(rels['!id'][s['!legrel']]) s['!legdrawel'] = rels['!id'][s['!legrel']];
 	return s;
 }

 /* TODO: something useful -- this is a stub */
-function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:number*/, opts, ws/*:Worksheet*/, last_seen/*:boolean*/, date1904/*:boolean*/)/*:boolean*/ {
-	var o/*:any*/ = ({r:R, c:C}/*:any*/);
-	if(cell.c) ws['!comments'].push([encode_cell(o), cell.c]);
+function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:number*/, opts, ws/*:Worksheet*/, last_seen/*:boolean*/)/*:boolean*/ {
 	if(cell.v === undefined) return false;
 	var vv = "";
 	switch(cell.t) {
@ -820,19 +810,21 @@ function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:num
 		case 'd': // no BrtCellDate :(
 			cell = dup(cell);
 			cell.z = cell.z || table_fmt[14];
-			cell.v = datenum(parseDate(cell.v, date1904), date1904); cell.t = 'n';
+			cell.v = datenum(parseDate(cell.v)); cell.t = 'n';
 			break;
 		/* falls through */
 		case 'n': case 'e': vv = ''+cell.v; break;
 		default: vv = cell.v; break;
 	}
+	var o/*:any*/ = ({r:R, c:C}/*:any*/);
 	/* TODO: cell style */
 	o.s = get_cell_style(opts.cellXfs, cell, opts);
 	if(cell.l) ws['!links'].push([encode_cell(o), cell.l]);
+	if(cell.c) ws['!comments'].push([encode_cell(o), cell.c]);
 	switch(cell.t) {
 		case 's': case 'str':
 			if(opts.bookSST) {
-				vv = get_sst_id(opts.Strings, (cell.v == null ? "" : String(cell.v)/*:any*/), opts.revStrings);
+				vv = get_sst_id(opts.Strings, (cell.v/*:any*/), opts.revStrings);
 				o.t = "s"; o.v = vv;
 				if(last_seen) write_record(ba, 0x0012 /* BrtShortIsst */, write_BrtShortIsst(cell, o));
 				else write_record(ba, 0x0007 /* BrtCellIsst */, write_BrtCellIsst(cell, o));
@ -847,12 +839,6 @@ function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:num
 			if(cell.v == (cell.v | 0) && cell.v > -1000 && cell.v < 1000) {
 				if(last_seen) write_record(ba, 0x000D /* BrtShortRk */, write_BrtShortRk(cell, o));
 				else write_record(ba, 0x0002 /* BrtCellRk */, write_BrtCellRk(cell, o));
-			} else if(isNaN(cell.v)) {
-				if(last_seen) write_record(ba, 0x000E /* BrtShortError */, write_BrtShortError({t:"e", v: 0x24}, o)); // #NUM!
-				else write_record(ba, 0x0003 /* BrtCellError */, write_BrtCellError({t:"e", v: 0x24}, o)); // #NUM!
-			} else if(!isFinite(cell.v)) {
-				if(last_seen) write_record(ba, 0x000E /* BrtShortError */, write_BrtShortError({t:"e", v: 0x07}, o)); // #DIV/0!
-				else write_record(ba, 0x0003 /* BrtCellError */, write_BrtCellError({t:"e", v: 0x07}, o)); // #DIV/0!
 			} else {
 				if(last_seen) write_record(ba, 0x0010 /* BrtShortReal */, write_BrtShortReal(cell, o));
 				else write_record(ba, 0x0005 /* BrtCellReal */, write_BrtCellReal(cell, o));
@ -873,11 +859,10 @@ function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:num
 	return true;
 }

-function write_CELLTABLE(ba, ws/*:Worksheet*/, idx/*:number*/, opts, wb/*:Workbook*/) {
+function write_CELLTABLE(ba, ws/*:Worksheet*/, idx/*:number*/, opts/*::, wb:Workbook*/) {
 	var range = safe_decode_range(ws['!ref'] || "A1"), ref, rr = "", cols/*:Array<string>*/ = [];
-	var date1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;
 	write_record(ba, 0x0091 /* BrtBeginSheetData */);
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	var cap = range.e.r;
 	if(ws['!rows']) cap = Math.max(range.e.r, ws['!rows'].length - 1);
 	for(var R = range.s.r; R <= cap; ++R) {
@ -890,10 +875,10 @@ function write_CELLTABLE(ba, ws/*:Worksheet*/, idx/*:number*/, opts, wb/*:Workbo
 			/* *16384CELL */
 			if(R === range.s.r) cols[C] = encode_col(C);
 			ref = cols[C] + rr;
-			var cell = dense ? (ws["!data"][R]||[])[C] : ws[ref];
+			var cell = dense ? (ws[R]||[])[C] : ws[ref];
 			if(!cell) { last_seen = false; continue; }
 			/* write cell */
-			last_seen = write_ws_bin_cell(ba, cell, R, C, opts, ws, last_seen, date1904);
+			last_seen = write_ws_bin_cell(ba, cell, R, C, opts, ws, last_seen);
 		}
 	}
 	write_record(ba, 0x0092 /* BrtEndSheetData */);
@ -924,7 +909,7 @@ function write_HLINKS(ba, ws/*:Worksheet*/, rels) {
 	/* *BrtHLink */
 	ws['!links'].forEach(function(l) {
 		if(!l[1].Target) return;
-		var rId = add_rels(rels, -1, l[1].Target.replace(/#[\s\S]*$/, ""), RELS.HLINK);
+		var rId = add_rels(rels, -1, l[1].Target.replace(/#.*$/, ""), RELS.HLINK);
 		write_record(ba, 0x01EE /* BrtHLink */, write_BrtHLink(l, rId));
 	});
 	delete ws['!links'];
@ -953,9 +938,9 @@ function write_AUTOFILTER(ba, ws, wb, idx) {
 		var name = names[i];
 		if(name.Name != '_xlnm._FilterDatabase') continue;
 		if(name.Sheet != idx) continue;
-		name.Ref = formula_quote_sheet_name(wb.SheetNames[idx]) + "!" + fix_range(ref); break;
+		name.Ref = "'" + wb.SheetNames[idx] + "'!" + ref; break;
 	}
-	if(i == names.length) names.push({ Name: '_xlnm._FilterDatabase', Sheet: idx, Ref: formula_quote_sheet_name(wb.SheetNames[idx]) + "!" + fix_range(ref)  });
+	if(i == names.length) names.push({ Name: '_xlnm._FilterDatabase', Sheet: idx, Ref: "'" + wb.SheetNames[idx] + "'!" + ref  });

 	write_record(ba, 0x00A1 /* BrtBeginAFilter */, write_UncheckedRfX(safe_decode_range(ref)));
 	/* *FILTERCOLUMN */
--- a/bits/69_chartxml.js
+++ b/bits/69_chartxml.js
@ -4,16 +4,16 @@ function parse_Cache(data/*:string*/)/*:[Array<number|string>, string, ?string]*
 	var f;

 	/* 21.2.2.150 pt CT_NumVal */
-	(data.match(/<c:pt idx="(\d*)"[^<>\/]*><c:v>([^<])<\/c:v><\/c:pt>/mg)||[]).forEach(function(pt) {
-		var q = pt.match(/<c:pt idx="(\d*)"[^<>\/]*><c:v>([^<]*)<\/c:v><\/c:pt>/);
+	(data.match(/<c:pt idx="(\d*)">(.*?)<\/c:pt>/mg)||[]).forEach(function(pt) {
+		var q = pt.match(/<c:pt idx="(\d*?)"><c:v>(.*)<\/c:v><\/c:pt>/);
 		if(!q) return;
 		col[+q[1]] = num ? +q[2] : q[2];
 	});

 	/* 21.2.2.71 formatCode CT_Xstring */
-	var nf = unescapexml((str_match_xml(data, "c:formatCode") || ["","General"])[1]);
+	var nf = unescapexml((data.match(/<c:formatCode>([\s\S]*?)<\/c:formatCode>/) || ["","General"])[1]);

-	(str_match_ng(data, "<c:f>", "</c:f>")||[]).forEach(function(F) { f = F.replace(/<[^<>]*>/g,""); });
+	(data.match(/<c:f>(.*?)<\/c:f>/mg)||[]).forEach(function(F) { f = F.replace(/<.*?>/g,""); });

 	return [col, nf, f];
 }
@ -28,16 +28,13 @@ function parse_chart(data/*:?string*/, name/*:string*/, opts, rels, wb, csheet)
 	var refguess = {s: {r:2000000, c:2000000}, e: {r:0, c:0} };

 	/* 21.2.2.120 numCache CT_NumData */
-	(str_match_ng(data, "<c:numCache>", "</c:numCache>")||[]).forEach(function(nc) {
+	(data.match(/<c:numCache>[\s\S]*?<\/c:numCache>/gm)||[]).forEach(function(nc) {
 		var cache = parse_Cache(nc);
 		refguess.s.r = refguess.s.c = 0;
 		refguess.e.c = C;
 		col = encode_col(C);
 		cache[0].forEach(function(n,i) {
-			if(cs["!data"]) {
-				if(!cs["!data"][i]) cs["!data"][i] = [];
-				cs["!data"][i][C] = {t:'n', v:n, z:cache[1] };
-			} else cs[col + encode_row(i)] = {t:'n', v:n, z:cache[1] };
+			cs[col + encode_row(i)] = {t:'n', v:n, z:cache[1] };
 			R = i;
 		});
 		if(refguess.e.r < R) refguess.e.r = R;
--- a/bits/70_csheet.js
+++ b/bits/70_csheet.js
@ -16,16 +16,16 @@ function parse_cs_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*::, them
 	if(rels['!id'][s['!rel']]) s['!drawel'] = rels['!id'][s['!rel']];
 	return s;
 }
-//function write_cs_xml(idx/*:number*/, opts, wb/*:Workbook*/, rels)/*:string*/ {
-//	var o = [XML_HEADER, writextag('chartsheet', null, {
-//		'xmlns': XMLNS_main[0],
-//		'xmlns:r': XMLNS.r
-//	})];
-//	o[o.length] = writextag("drawing", null, {"r:id": "rId1"});
-//	add_rels(rels, -1, "../drawings/drawing" + (idx+1) + ".xml", RELS.DRAW);
-//	if(o.length>2) { o[o.length] = ('</chartsheet>'); o[1]=o[1].replace("/>",">"); }
-//	return o.join("");
-//}
+function write_cs_xml(idx/*:number*/, opts, wb/*:Workbook*/, rels)/*:string*/ {
+	var o = [XML_HEADER, writextag('chartsheet', null, {
+		'xmlns': XMLNS_main[0],
+		'xmlns:r': XMLNS.r
+	})];
+	o[o.length] = writextag("drawing", null, {"r:id": "rId1"});
+	add_rels(rels, -1, "../drawings/drawing" + (idx+1) + ".xml", RELS.DRAW);
+	if(o.length>2) { o[o.length] = ('</chartsheet>'); o[1]=o[1].replace("/>",">"); }
+	return o.join("");
+}

 /* [MS-XLSB] 2.4.331 BrtCsProp */
 function parse_BrtCsProp(data, length/*:number*/) {
@ -81,22 +81,22 @@ function parse_cs_bin(data, opts, idx/*:number*/, rels, wb/*::, themes, styles*/
 	if(rels['!id'][s['!rel']]) s['!drawel'] = rels['!id'][s['!rel']];
 	return s;
 }
-//function write_cs_bin(/*::idx:number, opts, wb:Workbook, rels*/) {
-//	var ba = buf_array();
-//	write_record(ba, 0x0081 /* BrtBeginSheet */);
-//	/* [BrtCsProp] */
-//	/* CSVIEWS */
-//	/* [[BrtCsProtectionIso] BrtCsProtection] */
-//	/* [USERCSVIEWS] */
-//	/* [BrtMargins] */
-//	/* [BrtCsPageSetup] */
-//	/* [HEADERFOOTER] */
-//	/* BrtDrawing */
-//	/* [BrtLegacyDrawing] */
-//	/* [BrtLegacyDrawingHF] */
-//	/* [BrtBkHim] */
-//	/* [WEBPUBITEMS] */
-//	/* FRTCHARTSHEET */
-//	write_record(ba, 0x0082 /* BrtEndSheet */);
-//	return ba.end();
-//}
+function write_cs_bin(/*::idx:number, opts, wb:Workbook, rels*/) {
+	var ba = buf_array();
+	write_record(ba, 0x0081 /* BrtBeginSheet */);
+	/* [BrtCsProp] */
+	/* CSVIEWS */
+	/* [[BrtCsProtectionIso] BrtCsProtection] */
+	/* [USERCSVIEWS] */
+	/* [BrtMargins] */
+	/* [BrtCsPageSetup] */
+	/* [HEADERFOOTER] */
+	/* BrtDrawing */
+	/* [BrtLegacyDrawing] */
+	/* [BrtLegacyDrawingHF] */
+	/* [BrtBkHim] */
+	/* [WEBPUBITEMS] */
+	/* FRTCHARTSHEET */
+	write_record(ba, 0x0082 /* BrtEndSheet */);
+	return ba.end();
+}
--- a/bits/71_wbcommon.js
+++ b/bits/71_wbcommon.js
@ -113,19 +113,16 @@ function safe1904(wb/*:Workbook*/)/*:string*/ {
 	return parsexmlbool(wb.Workbook.WBProps.date1904) ? "true" : "false";
 }

-var badchars = /*#__PURE__*/":][*?\/\\".split("");
+var badchars = /*#__PURE__*/"][*?\/\\".split("");
 function check_ws_name(n/*:string*/, safe/*:?boolean*/)/*:boolean*/ {
-	try {
-		if(n == "") throw new Error("Sheet name cannot be blank");
-		if(n.length > 31) throw new Error("Sheet name cannot exceed 31 chars");
-		if(n.charCodeAt(0) == 0x27 || n.charCodeAt(n.length - 1) == 0x27) throw new Error("Sheet name cannot start or end with apostrophe (')");
-		if(n.toLowerCase() == "history") throw new Error("Sheet name cannot be 'History'");
-		badchars.forEach(function(c) {
-			if(n.indexOf(c) == -1) return;
-			throw new Error("Sheet name cannot contain : \\ / ? * [ ]");
-		});
-	} catch(e) { if(safe) return false; throw e; }
-	return true;
+	if(n.length > 31) { if(safe) return false; throw new Error("Sheet names cannot exceed 31 chars"); }
+	var _good = true;
+	badchars.forEach(function(c) {
+		if(n.indexOf(c) == -1) return;
+		if(!safe) throw new Error("Sheet name cannot contain : \\ / ? * [ ]");
+		_good = false;
+	});
+	return _good;
 }
 function check_wb_names(N, S, codes) {
 	N.forEach(function(n,i) {
@ -143,16 +140,5 @@ function check_wb(wb) {
 	var Sheets = (wb.Workbook && wb.Workbook.Sheets) || [];
 	check_wb_names(wb.SheetNames, Sheets, !!wb.vbaraw);
 	for(var i = 0; i < wb.SheetNames.length; ++i) check_ws(wb.Sheets[wb.SheetNames[i]], wb.SheetNames[i], i);
-	wb.SheetNames.forEach(function(n, i) {
-		var ws = wb.Sheets[n];
-		if(!ws || !ws["!autofilter"]) return;
-		var DN;
-		if(!wb.Workbook) wb.Workbook = {};
-		if(!wb.Workbook.Names) wb.Workbook.Names = [];
-		wb.Workbook.Names.forEach(function(dn) { if(dn.Name == "_xlnm._FilterDatabase" && dn.Sheet == i) DN = dn; });
-		var nn = formula_quote_sheet_name(n) + "!" + fix_range(ws["!autofilter"].ref);
-		if(DN) DN.Ref = nn;
-		else wb.Workbook.Names.push({Name: "_xlnm._FilterDatabase", Sheet: i, Ref: nn});
-	});
 	/* TODO: validate workbook */
 }
--- a/bits/73_wbbin.js
+++ b/bits/73_wbbin.js
@ -45,7 +45,6 @@ function write_BrtWbProp(data/*:?WBProps*/, o) {
 	var flags = 0;
 	if(data) {
 		/* TODO: mirror parse_BrtWbProp fields */
-		if(data.date1904) flags |= 0x01;
 		if(data.filterPrivacy) flags |= 0x08;
 	}
 	o.write_shift(4, flags);
@ -65,19 +64,12 @@ function parse_BrtFRTArchID$(data, length) {
 /* [MS-XLSB] 2.4.687 BrtName */
 function parse_BrtName(data, length, opts) {
 	var end = data.l + length;
-	var flags = data.read_shift(4);
+	data.l += 4; //var flags = data.read_shift(4);
 	data.l += 1; //var chKey = data.read_shift(1);
 	var itab = data.read_shift(4);
 	var name = parse_XLNameWideString(data);
-	var formula;
-	var comment = "";
-	try {
-		formula = parse_XLSBNameParsedFormula(data, 0, opts);
-		try {
-			comment = parse_XLNullableWideString(data);
-		} catch(e){}
-	} catch(e) { console.error("Could not parse defined name " + name); }
-	if(flags & 0x20) name = "_xlnm." + name;
+	var formula = parse_XLSBNameParsedFormula(data, 0, opts);
+	var comment = parse_XLNullableWideString(data);
 	//if(0 /* fProc */) {
 		// unusedstring1: XLNullableWideString
 		// description: XLNullableWideString
@ -85,40 +77,11 @@ function parse_BrtName(data, length, opts) {
 		// unusedstring2: XLNullableWideString
 	//}
 	data.l = end;
-	var out = ({Name:name, Ptg:formula, Flags: flags}/*:any*/);
+	var out = ({Name:name, Ptg:formula}/*:any*/);
 	if(itab < 0xFFFFFFF) out.Sheet = itab;
 	if(comment) out.Comment = comment;
 	return out;
 }
-function write_BrtName(name, wb) {
-	var o = new_buf(9);
-	var flags = 0;
-	var dname = name.Name;
-	if(XLSLblBuiltIn.indexOf(dname) > -1) { flags |= 0x20; dname = dname.slice(6); }
-	o.write_shift(4, flags); // flags
-	o.write_shift(1, 0); // chKey
-	o.write_shift(4, name.Sheet == null ? 0xFFFFFFFF : name.Sheet);
-
-	var arr = [
-		o,
-		write_XLWideString(dname),
-		write_XLSBNameParsedFormula(name.Ref, wb)
-	];
-	if(name.Comment) arr.push(write_XLNullableWideString(name.Comment));
-	else {
-		var x = new_buf(4);
-		x.write_shift(4, 0xFFFFFFFF);
-		arr.push(x);
-	}
-
-	// if macro (flags & 0x0F):
-	// write_shift(4, 0xFFFFFFFF);
-	// write_XLNullableWideString(description)
-	// write_XLNullableWideString(helpTopic)
-	// write_shift(4, 0xFFFFFFFF);
-
-	return bconcat(arr);
-}

 /* [MS-XLSB] 2.1.7.61 Workbook */
 function parse_wb_bin(data, opts)/*:WorkbookFile*/ {
@ -147,7 +110,7 @@ function parse_wb_bin(data, opts)/*:WorkbookFile*/ {

 			case 0x0027: /* 'BrtName' */
 				if(val.Sheet != null) opts.SID = val.Sheet;
-				val.Ref = val.Ptg ? stringify_formula(val.Ptg, null, null, supbooks, opts) : "#REF!";
+				val.Ref = stringify_formula(val.Ptg, null, null, supbooks, opts);
 				delete opts.SID;
 				delete val.Ptg;
 				Names.push(val);
@ -283,34 +246,6 @@ function write_BOOKVIEWS(ba, wb/*::, opts*/) {
 	write_record(ba, 0x0088 /* BrtEndBookViews */);
 }

-function write_BRTNAMES(ba, wb) {
-	if(!wb.Workbook || !wb.Workbook.Names) return;
-	wb.Workbook.Names.forEach(function(name) { try {
-		if(name.Flags & 0x0e) return; // TODO: macro name write
-		write_record(ba, 0x0027 /* BrtName */, write_BrtName(name, wb));
-	} catch(e) {
-		console.error("Could not serialize defined name " + JSON.stringify(name));
-	} });
-}
-
-function write_SELF_EXTERNS_xlsb(wb) {
-	var L = wb.SheetNames.length;
-	var o = new_buf(12 * L + 28);
-	o.write_shift(4, L + 2);
-	o.write_shift(4, 0); o.write_shift(4, -2); o.write_shift(4, -2); // workbook-level reference
-	o.write_shift(4, 0); o.write_shift(4, -1); o.write_shift(4, -1); // #REF!...
-	for(var i = 0; i < L; ++i) {
-		o.write_shift(4, 0); o.write_shift(4, i); o.write_shift(4, i);
-	}
-	return o;
-}
-function write_EXTERNALS_xlsb(ba, wb) {
-	write_record(ba, 0x0161 /* BrtBeginExternals */);
-	write_record(ba, 0x0165 /* BrtSupSelf */);
-	write_record(ba, 0x016A /* BrtExternSheet */, write_SELF_EXTERNS_xlsb(wb, 0));
-	write_record(ba, 0x0162 /* BrtEndExternals */);
-}
-
 /* [MS-XLSB] 2.4.305 BrtCalcProp */
 /*function write_BrtCalcProp(data, o) {
 	if(!o) o = new_buf(26);
@ -343,8 +278,8 @@ function write_wb_bin(wb, opts) {
 	write_BOOKVIEWS(ba, wb, opts);
 	write_BUNDLESHS(ba, wb, opts);
 	/* [FNGROUP] */
-	write_EXTERNALS_xlsb(ba, wb);
-	if((wb.Workbook||{}).Names) write_BRTNAMES(ba, wb);
+	/* [EXTERNALS] */
+	/* *BrtName */
 	/* write_record(ba, 0x009D BrtCalcProp, write_BrtCalcProp()); */
 	/* [BrtOleSize] */
 	/* *(BrtUserBookView *FRT) */
--- a/bits/74_xmlbin.js
+++ b/bits/74_xmlbin.js
@ -28,6 +28,10 @@ function parse_sty(data, name/*:string*/, themes, opts) {
 	return parse_sty_xml((data/*:any*/), themes, opts);
 }

+function parse_theme(data/*:string*/, name/*:string*/, opts) {
+	return parse_theme_xml(data, opts);
+}
+
 function parse_sst(data, name/*:string*/, opts)/*:SST*/ {
 	if(name.slice(-4)===".bin") return parse_sst_bin((data/*:any*/), opts);
 	return parse_sst_xml((data/*:any*/), opts);
@ -52,3 +56,37 @@ function parse_xlmeta(data, name/*:string*/, opts) {
 	if(name.slice(-4)===".bin") return parse_xlmeta_bin((data/*:any*/), name, opts);
 	return parse_xlmeta_xml((data/*:any*/), name, opts);
 }
+
+function write_wb(wb, name/*:string*/, opts) {
+	return (name.slice(-4)===".bin" ? write_wb_bin : write_wb_xml)(wb, opts);
+}
+
+function write_ws(data/*:number*/, name/*:string*/, opts, wb/*:Workbook*/, rels) {
+	return (name.slice(-4)===".bin" ? write_ws_bin : write_ws_xml)(data, opts, wb, rels);
+}
+
+// eslint-disable-next-line no-unused-vars
+function write_cs(data/*:number*/, name/*:string*/, opts, wb/*:Workbook*/, rels) {
+	return (name.slice(-4)===".bin" ? write_cs_bin : write_cs_xml)(data, opts, wb, rels);
+}
+
+function write_sty(data, name/*:string*/, opts) {
+	return (name.slice(-4)===".bin" ? write_sty_bin : write_sty_xml)(data, opts);
+}
+
+function write_sst(data/*:SST*/, name/*:string*/, opts) {
+	return (name.slice(-4)===".bin" ? write_sst_bin : write_sst_xml)(data, opts);
+}
+
+function write_cmnt(data/*:Array<any>*/, name/*:string*/, opts) {
+	return (name.slice(-4)===".bin" ? write_comments_bin : write_comments_xml)(data, opts);
+}
+/*
+function write_cc(data, name:string, opts) {
+	return (name.slice(-4)===".bin" ? write_cc_bin : write_cc_xml)(data, opts);
+}
+*/
+
+function write_xlmeta(name/*:string*/) {
+	return (name.slice(-4)===".bin" ? write_xlmeta_bin : write_xlmeta_xml)();
+}
--- a/bits/75_xlml.js
+++ b/bits/75_xlml.js
@ -1,5 +1,5 @@
-var attregexg2=/\b((?:\w+:)?[\w]+)=((?:")([^"]*)(?:")|(?:')([^']*)(?:'))/g;
-var attregex2=/\b((?:\w+:)?[\w]+)=((?:")(?:[^"]*)(?:")|(?:')(?:[^']*)(?:'))/;
+var attregexg2=/([\w:]+)=((?:")([^"]*)(?:")|(?:')([^']*)(?:'))/g;
+var attregex2=/([\w:]+)=((?:")(?:[^"]*)(?:")|(?:')(?:[^']*)(?:'))/;
 function xlml_parsexmltag(tag/*:string*/, skip_root/*:?boolean*/) {
 	var words = tag.split(/\s+/);
 	var z/*:any*/ = ([]/*:any*/); if(!skip_root) z[0] = words[0];
@ -40,10 +40,10 @@ function xlml_parsexmltagobj(tag/*:string*/) {
 /* map from xlml named formats to SSF TODO: localize */
 var XLMLFormatMap/*: {[string]:string}*/;

-function xlml_format(format, value, date1904)/*:string*/ {
+function xlml_format(format, value)/*:string*/ {
 	var fmt = XLMLFormatMap[format] || unescapexml(format);
 	if(fmt === "General") return SSF_general(value);
-	return SSF_format(fmt, value, {date1904: !!date1904});
+	return SSF_format(fmt, value);
 }

 function xlml_set_custprop(Custprops, key, cp, val/*:string*/) {
@ -59,7 +59,7 @@ function xlml_set_custprop(Custprops, key, cp, val/*:string*/) {
 	Custprops[unescapexml(key)] = oval;
 }

-function safe_format_xlml(cell/*:Cell*/, nf, o, date1904) {
+function safe_format_xlml(cell/*:Cell*/, nf, o) {
 	if(cell.t === 'z') return;
 	if(!o || o.cellText !== false) try {
 		if(cell.t === 'e') { cell.w = cell.w || BErr[cell.v]; }
@ -70,13 +70,13 @@ function safe_format_xlml(cell/*:Cell*/, nf, o, date1904) {
 			}
 			else cell.w = SSF_general(cell.v);
 		}
-		else cell.w = xlml_format(nf||"General", cell.v, date1904);
+		else cell.w = xlml_format(nf||"General", cell.v);
 	} catch(e) { if(o.WTF) throw e; }
 	try {
 		var z = XLMLFormatMap[nf]||nf||"General";
 		if(o.cellNF) cell.z = z;
 		if(o.cellDates && cell.t == 'n' && fmt_is_date(z)) {
-			var _d = SSF_parse_date_code(cell.v + (date1904 ? 1462 : 0)); if(_d) { cell.t = 'd'; cell.v = new Date(Date.UTC(_d.y, _d.m-1,_d.d,_d.H,_d.M,_d.S,_d.u)); }
+			var _d = SSF_parse_date_code(cell.v); if(_d) { cell.t = 'd'; cell.v = new Date(_d.y, _d.m-1,_d.d,_d.H,_d.M,_d.S,_d.u); }
 		}
 	} catch(e) { if(o.WTF) throw e; }
 }
@ -92,18 +92,17 @@ function process_style_xlml(styles, stag, opts) {
 }

 /* TODO: there must exist some form of OSP-blessed spec */
-function parse_xlml_data(xml, ss, data, cell/*:any*/, base, styles, csty, row, arrayf, o, date1904) {
+function parse_xlml_data(xml, ss, data, cell/*:any*/, base, styles, csty, row, arrayf, o) {
 	var nf = "General", sid = cell.StyleID, S = {}; o = o || {};
 	var interiors = [];
 	var i = 0;
 	if(sid === undefined && row) sid = row.StyleID;
 	if(sid === undefined && csty) sid = csty.StyleID;
 	while(styles[sid] !== undefined) {
-		var ssid = styles[sid];
-		if(ssid.nf) nf = ssid.nf;
-		if(ssid.Interior) interiors.push(ssid.Interior);
-		if(!ssid.Parent) break;
-		sid = ssid.Parent;
+		if(styles[sid].nf) nf = styles[sid].nf;
+		if(styles[sid].Interior) interiors.push(styles[sid].Interior);
+		if(!styles[sid].Parent) break;
+		sid = styles[sid].Parent;
 	}
 	switch(data.Type) {
 		case 'Boolean':
@ -112,12 +111,13 @@ function parse_xlml_data(xml, ss, data, cell/*:any*/, base, styles, csty, row, a
 			break;
 		case 'String':
 			cell.t = 's'; cell.r = xlml_fixstr(unescapexml(xml));
-			cell.v = (xml.indexOf("<") > -1 ? unescapexml(ss||xml).replace(/<[^<>]*>/g, "") : cell.r); // todo: BR etc
+			cell.v = (xml.indexOf("<") > -1 ? unescapexml(ss||xml).replace(/<.*?>/g, "") : cell.r); // todo: BR etc
 			break;
 		case 'DateTime':
 			if(xml.slice(-1) != "Z") xml += "Z";
-			cell.v = datenum(parseDate(xml, date1904), date1904);
+			cell.v = (parseDate(xml) - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
 			if(cell.v !== cell.v) cell.v = unescapexml(xml);
+			else if(cell.v<60) cell.v = cell.v -1;
 			if(!nf || nf == "General") nf = "yyyy-mm-dd";
 			/* falls through */
 		case 'Number':
@ -130,7 +130,7 @@ function parse_xlml_data(xml, ss, data, cell/*:any*/, base, styles, csty, row, a
 			else { cell.t = 's'; cell.v = xlml_fixstr(ss||xml); }
 			break;
 	}
-	safe_format_xlml(cell, nf, o, date1904);
+	safe_format_xlml(cell, nf, o);
 	if(o.cellFormula !== false) {
 		if(cell.Formula) {
 			var fstr = unescapexml(cell.Formula);
@ -159,10 +159,6 @@ function parse_xlml_data(xml, ss, data, cell/*:any*/, base, styles, csty, row, a
 	if(cell.StyleID !== undefined) cell.ixfe = cell.StyleID;
 }

-function xlml_prefix_dname(dname) {
-	return XLSLblBuiltIn.indexOf("_xlnm." + dname) > -1 ? "_xlnm." + dname : dname;
-}
-
 function xlml_clean_comment(comment/*:any*/) {
 	comment.t = comment.v || "";
 	comment.t = comment.t.replace(/\r\n/g,"\n").replace(/\r/g,"\n");
@ -207,7 +203,7 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 	var Rn;
 	var state = [], tmp;
 	if(DENSE != null && opts.dense == null) opts.dense = DENSE;
-	var sheets = {}, sheetnames/*:Array<string>*/ = [], cursheet/*:Worksheet*/ = ({}), sheetname = ""; if(opts.dense) cursheet["!data"] = [];
+	var sheets = {}, sheetnames/*:Array<string>*/ = [], cursheet/*:Worksheet*/ = (opts.dense ? [] : {}), sheetname = "";
 	var cell = ({}/*:any*/), row = {};// eslint-disable-line no-unused-vars
 	var dtag = xlml_parsexmltag('<Data ss:Type="String">'), didx = 0;
 	var c = 0, r = 0;
@ -222,7 +218,7 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 	var rowinfo/*:Array<RowInfo>*/ = [], rowobj = {}, cc = 0, rr = 0;
 	var Workbook/*:WBWBProps*/ = ({ Sheets:[], WBProps:{date1904:false} }/*:any*/), wsprops = {};
 	xlmlregex.lastIndex = 0;
-	str = str_remove_ng(str, "<!--", "-->");
+	str = str.replace(/<!--([\s\S]*?)-->/mg,"");
 	var raw_Rn3 = "";
 	while((Rn = xlmlregex.exec(str))) switch((Rn[3] = (raw_Rn3 = Rn[3]).toLowerCase())) {
 		case 'data' /*case 'Data'*/:
@ -232,16 +228,16 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 				break;
 			}
 			if(state[state.length-1][1]) break;
-			if(Rn[1]==='/') parse_xlml_data(str.slice(didx, Rn.index), ss, dtag, state[state.length-1][0]==/*"Comment"*/"comment"?comment:cell, {c:c,r:r}, styles, cstys[c], row, arrayf, opts, Workbook.WBProps.date1904);
+			if(Rn[1]==='/') parse_xlml_data(str.slice(didx, Rn.index), ss, dtag, state[state.length-1][0]==/*"Comment"*/"comment"?comment:cell, {c:c,r:r}, styles, cstys[c], row, arrayf, opts);
 			else { ss = ""; dtag = xlml_parsexmltag(Rn[0]); didx = Rn.index + Rn[0].length; }
 			break;
 		case 'cell' /*case 'Cell'*/:
 			if(Rn[1]==='/'){
 				if(comments.length > 0) cell.c = comments;
-				if((!opts.sheetRows || opts.sheetRows > r) && cell.v !== void 0) {
+				if((!opts.sheetRows || opts.sheetRows > r) && cell.v !== undefined) {
 					if(opts.dense) {
-						if(!cursheet["!data"][r]) cursheet["!data"][r] = [];
-						cursheet["!data"][r][c] = cell;
+						if(!cursheet[r]) cursheet[r] = [];
+						cursheet[r][c] = cell;
 					} else cursheet[encode_col(c) + encode_row(r)] = cell;
 				}
 				if(cell.HRef) {
@ -252,7 +248,7 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 				if(cell.MergeAcross || cell.MergeDown) {
 					cc = c + (parseInt(cell.MergeAcross,10)|0);
 					rr = r + (parseInt(cell.MergeDown,10)|0);
-					if(cc > c || rr > r) merges.push({s:{c:c,r:r},e:{c:cc,r:rr}});
+					merges.push({s:{c:c,r:r},e:{c:cc,r:rr}});
 				}
 				if(!opts.sheetStubs) { if(cell.MergeAcross) c = cc + 1; else ++c; }
 				else if(cell.MergeAcross || cell.MergeDown) {
@ -261,8 +257,8 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 						for(var cmd = r; cmd <= rr; ++cmd) {
 							if(cma > c || cmd > r) {
 								if(opts.dense) {
-									if(!cursheet["!data"][cmd]) cursheet["!data"][cmd] = [];
-									cursheet["!data"][cmd][cma] = {t:'z'};
+									if(!cursheet[cmd]) cursheet[cmd] = [];
+									cursheet[cmd][cma] = {t:'z'};
 								} else cursheet[encode_col(cma) + encode_row(cmd)] = {t:'z'};
 							}
 						}
@ -321,7 +317,7 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 				state.push([Rn[3], false]);
 				tmp = xlml_parsexmltag(Rn[0]);
 				sheetname = unescapexml(tmp.Name);
-				cursheet = ({}); if(opts.dense) cursheet["!data"] = [];
+				cursheet = (opts.dense ? [] : {});
 				merges = [];
 				arrayf = [];
 				rowinfo = [];
@ -347,12 +343,11 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 			stag.nf = unescapexml(xlml_parsexmltag(Rn[0]).Format || "General");
 			if(XLMLFormatMap[stag.nf]) stag.nf = XLMLFormatMap[stag.nf];
 			for(var ssfidx = 0; ssfidx != 0x188; ++ssfidx) if(table_fmt[ssfidx] == stag.nf) break;
-			if(ssfidx == 0x188) for(ssfidx = 0x39; ssfidx != 0x188; ++ssfidx) if(table_fmt[ssfidx] == null) { SSF__load(stag.nf, ssfidx); break; }
+			if(ssfidx == 0x188) for(ssfidx = 0x39; ssfidx != 0x188; ++ssfidx) if(table_fmt[ssfidx] == null) { SSF_load(stag.nf, ssfidx); break; }
 			break;

 		case 'column' /*case 'Column'*/:
 			if(state[state.length-1][0] !== /*'Table'*/'table') break;
-			if(Rn[1]==='/') break;
 			csty = xlml_parsexmltag(Rn[0]);
 			if(csty.Hidden) { csty.hidden = true; delete csty.Hidden; }
 			if(csty.Width) csty.wpx = parseInt(csty.Width, 10);
@ -370,7 +365,7 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 			if(!Workbook.Names) Workbook.Names = [];
 			var _NamedRange = parsexmltag(Rn[0]);
 			var _DefinedName/*:DefinedName*/ = ({
-				Name: xlml_prefix_dname(_NamedRange.Name),
+				Name: _NamedRange.Name,
 				Ref: rc_to_a1(_NamedRange.RefersTo.slice(1), {r:0, c:0})
 			}/*:any*/);
 			if(Workbook.Sheets.length>0) _DefinedName.Sheet=Workbook.Sheets.length-1;
@ -443,7 +438,6 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 			} else {
 				state.push([Rn[3], false]);
 				tmp = xlml_parsexmltag(Rn[0]);
-				if(!parsexmlbool(tmp["ShowAlways"]||"0")) comments.hidden = true;
 				comment = ({a:tmp.Author}/*:any*/);
 			}
 			break;
@ -535,9 +529,6 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 						/*:: if(!Workbook.WBProps) Workbook.WBProps = {}; */
 						Workbook.WBProps.date1904 = true;
 						break;
-					case 'hidehorizontalscrollbar' /*case 'HideHorizontalScrollBar'*/: break;
-					case 'hideverticalscrollbar' /*case 'HideVerticalScrollBar'*/: break;
-					case 'hideworkbooktabs' /*case 'HideWorkbookTabs'*/: break;
 					case 'windowheight' /*case 'WindowHeight'*/: break;
 					case 'windowwidth' /*case 'WindowWidth'*/: break;
 					case 'windowtopx' /*case 'WindowTopX'*/: break;
@ -923,7 +914,6 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 	out.SSF = dup(table_fmt);
 	out.Props = Props;
 	out.Custprops = Custprops;
-	out.bookType = "xlml";
 	return out;
 }

@ -947,10 +937,9 @@ function write_props_xlml(wb/*:Workbook*/, opts)/*:string*/ {
 	return o.join("");
 }
 /* TODO */
-function write_wb_xlml(wb/*::, opts*/)/*:string*/ {
+function write_wb_xlml(/*::wb, opts*/)/*:string*/ {
 	/* OfficeDocumentSettings */
 	/* ExcelWorkbook */
-	if((((wb||{}).Workbook||{}).WBProps||{}).date1904) return '<ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel"><Date1904/></ExcelWorkbook>';
 	return "";
 }
 /* TODO */
@ -966,7 +955,7 @@ function write_sty_xlml(wb, opts)/*:string*/ {
 	});
 	return writextag("Styles", styles.join(""));
 }
-function write_name_xlml(n) { return writextag("NamedRange", null, {"ss:Name": n.Name.slice(0,6) == "_xlnm." ? n.Name.slice(6) : n.Name, "ss:RefersTo":"=" + a1_to_rc(n.Ref, {r:0,c:0})}); }
+function write_name_xlml(n) { return writextag("NamedRange", null, {"ss:Name": n.Name, "ss:RefersTo":"=" + a1_to_rc(n.Ref, {r:0,c:0})}); }
 function write_names_xlml(wb/*::, opts*/)/*:string*/ {
 	if(!((wb||{}).Workbook||{}).Names) return "";
 	/*:: if(!wb || !wb.Workbook || !wb.Workbook.Names) throw new Error("unreachable"); */
@ -1106,15 +1095,11 @@ function write_ws_xlml_wsopts(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workb
 	return writextag("WorksheetOptions", o.join(""), {xmlns:XLMLNS.x});
 }
 function write_ws_xlml_comment(comments/*:Array<any>*/)/*:string*/ {
-	/* TODO: test multiple comments */
 	return comments.map(function(c) {
 		// TODO: formatted text
 		var t = xlml_unfixstr(c.t||"");
 		var d =writextag("ss:Data", t, {"xmlns":"http://www.w3.org/TR/REC-html40"});
-		var p = {};
-		if(c.a) p["ss:Author"] = c.a;
-		if(!comments.hidden) p["ss:ShowAlways"] = "1";
-		return writextag("Comment", d, p);
+		return writextag("Comment", d, {"ss:Author":c.a});
 	}).join("");
 }
 function write_ws_xlml_cell(cell, ref/*:string*/, ws, opts, idx/*:number*/, wb, addr)/*:string*/{
@ -1185,7 +1170,7 @@ function write_ws_xlml_table(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbo
 		if(n.hidden) k['ss:Hidden']="1";
 		o.push(writextag("Column",null,k));
 	});
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	for(var R = range.s.r; R <= range.e.r; ++R) {
 		var row = [write_ws_xlml_row(R, (ws['!rows']||[])[R])];
 		for(var C = range.s.c; C <= range.e.c; ++C) {
@ -1200,7 +1185,7 @@ function write_ws_xlml_table(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbo
 			}
 			if(skip) continue;
 			var addr = {r:R,c:C};
-			var ref = encode_col(C) + encode_row(R), cell = dense ? (ws["!data"][R]||[])[C] : ws[ref];
+			var ref = encode_cell(addr), cell = dense ? (ws[R]||[])[C] : ws[ref];
 			row.push(write_ws_xlml_cell(cell, ref, ws, opts, idx, wb, addr));
 		}
 		row.push("</Row>");
@ -1223,8 +1208,6 @@ function write_ws_xlml(idx/*:number*/, opts, wb/*:Workbook*/)/*:string*/ {
 	/* WorksheetOptions */
 	o.push(write_ws_xlml_wsopts(ws, opts, idx, wb));

-	if(ws["!autofilter"]) o.push('<AutoFilter x:Range="' + a1_to_rc(fix_range(ws["!autofilter"].ref), {r:0,c:0}) + '" xmlns="urn:schemas-microsoft-com:office:excel"></AutoFilter>');
-
 	return o.join("");
 }
 function write_xlml(wb, opts)/*:string*/ {
--- a/bits/76_xls.js
+++ b/bits/76_xls.js
@ -40,7 +40,7 @@ function slurp(RecordType, R, blob, length/*:number*/, opts)/*:any*/ {
 	var bufs = [];
 	var d = blob.slice(blob.l,blob.l+l);
 	if(opts && opts.enc && opts.enc.insitu && d.length > 0) switch(RecordType) {
-	case 0x0009: case 0x0209: case 0x0409: case 0x0809/* BOF */: case 0x002F /* FilePass */: case 0x0195 /* FileLock */: case 0x00E1 /* InterfaceHdr */: case 0x0196 /* RRDInfo */: case 0x0138 /* RRDHead */: case 0x0194 /* UsrExcl */: case 0x000a /* EOF */:
+	case 0x0009: case 0x0209: case 0x0409: case 0x0809/* BOF */: case 0x002f /* FilePass */: case 0x0195 /* FileLock */: case 0x00e1 /* InterfaceHdr */: case 0x0196 /* RRDInfo */: case 0x0138 /* RRDHead */: case 0x0194 /* UsrExcl */: case 0x000a /* EOF */:
 		break;
 	case 0x0085 /* BoundSheet8 */:
 		break;
@ -77,7 +77,7 @@ function safe_format_xf(p/*:any*/, opts/*:ParseOpts*/, date1904/*:?boolean*/) {
 	var fmtid = 0;
 	try {
 		fmtid = p.z || p.XF.numFmtId || 0;
-		if(opts.cellNF && p.z == null) p.z = table_fmt[fmtid];
+		if(opts.cellNF) p.z = table_fmt[fmtid];
 	} catch(e) { if(opts.WTF) throw e; }
 	if(!opts || opts.cellText !== false) try {
 		if(p.t === 'e') { p.w = p.w || BErr[p.v]; }
@ -91,7 +91,7 @@ function safe_format_xf(p/*:any*/, opts/*:ParseOpts*/, date1904/*:?boolean*/) {
 		else p.w = SSF_format(fmtid,p.v, {date1904:!!date1904, dateNF: opts && opts.dateNF});
 	} catch(e) { if(opts.WTF) throw e; }
 	if(opts.cellDates && fmtid && p.t == 'n' && fmt_is_date(table_fmt[fmtid] || String(fmtid))) {
-		var _d = SSF_parse_date_code(p.v + (date1904 ? 1462 : 0)); if(_d) { p.t = 'd'; p.v = new Date(Date.UTC(_d.y, _d.m-1,_d.d,_d.H,_d.M,_d.S,_d.u)); }
+		var _d = SSF_parse_date_code(p.v); if(_d) { p.t = 'd'; p.v = new Date(_d.y, _d.m-1,_d.d,_d.H,_d.M,_d.S,_d.u); }
 	}
 }

@ -104,7 +104,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 	var wb = ({opts:{}}/*:any*/);
 	var Sheets = {};
 	if(DENSE != null && options.dense == null) options.dense = DENSE;
-	var out/*:Worksheet*/ = ({}/*:any*/); if(options.dense) out["!data"] = [];
+	var out/*:Worksheet*/ = ((options.dense ? [] : {})/*:any*/);
 	var Directory = {};
 	var range/*:Range*/ = ({}/*:any*/);
 	var last_formula = null;
@ -119,13 +119,12 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 	var XFs = []; /* XF records */
 	var palette/*:Array<[number, number, number]>*/ = [];
 	var Workbook/*:WBWBProps*/ = ({ Sheets:[], WBProps:{date1904:false}, Views:[{}] }/*:any*/), wsprops = {};
-	var biff4w = false;
 	var get_rgb = function getrgb(icv/*:number*/)/*:[number, number, number]*/ {
 		if(icv < 8) return XLSIcv[icv];
 		if(icv < 64) return palette[icv-8] || XLSIcv[icv];
 		return XLSIcv[icv];
 	};
-	var process_cell_style = function pcs(line/*:any*/, options) {
+	var process_cell_style = function pcs(cell, line/*:any*/, options) {
 		var xfd = line.XF.data;
 		if(!xfd || !xfd.patternType || !options || !options.cellStyles) return;
 		line.s = ({}/*:any*/);
@ -135,9 +134,9 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 		if((t = rgb2Hex(get_rgb(xfd.icvBack)))) { line.s.bgColor = {rgb:t}; }
 	};
 	var addcell = function addcell(cell/*:any*/, line/*:any*/, options/*:any*/) {
-		if(!biff4w && file_depth > 1) return;
+		if(file_depth > 1) return;
 		if(options.sheetRows && cell.r >= options.sheetRows) return;
-		if(options.cellStyles && line.XF && line.XF.data) process_cell_style(line, options);
+		if(options.cellStyles && line.XF && line.XF.data) process_cell_style(cell, line, options);
 		delete line.ixfe; delete line.XF;
 		lastcell = cell;
 		last_cell = encode_cell(cell);
@ -158,8 +157,8 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 		}
 		{
 			if(options.dense) {
-				if(!out["!data"][cell.r]) out["!data"][cell.r] = [];
-				out["!data"][cell.r][cell.c] = line;
+				if(!out[cell.r]) out[cell.r] = [];
+				out[cell.r][cell.c] = line;
 			} else out[last_cell] = line;
 		}
 	};
@ -205,7 +204,6 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 		if(RecordType === 0 && last_RT === 0x000a /* EOF */) break;
 		var length = (blob.l === blob.length ? 0 : blob.read_shift(2));
 		var R = XLSRecordEnum[RecordType];
-		if(file_depth == 0 && [0x0009, 0x0209, 0x0409, 0x0809].indexOf(RecordType) == -1 /* BOF */) break;
 		//console.log(RecordType.toString(16), RecordType, R, blob.l, length, blob.length);
 		//if(!R) console.log(blob.slice(blob.l, blob.l + length));
 		if(R && R.f) {
@ -225,7 +223,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 			if(RecordType === 0x000a /* EOF */) val = /*::(*/R.f(blob, length, opts)/*:: :any)*/;
 			else val = /*::(*/slurp(RecordType, R, blob, length, opts)/*:: :any)*/;
 			/*:: val = (val:any); */
-			if(file_depth == 0 && [0x0009, 0x0209, 0x0409, 0x0809].indexOf(last_RT) === -1 /* BOF */) continue;
+			if(file_depth == 0 && [0x0009, 0x0209, 0x0409, 0x0809].indexOf(last_RT) === -1 /* 'BOF' */) continue;
 			switch(RecordType) {
 				case 0x0022 /* Date1904 */:
 					/*:: if(!Workbook.WBProps) Workbook.WBProps = {}; */
@ -266,7 +264,6 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					if(!val.fBelow) (out["!outline"] || (out["!outline"] = {})).above = true;
 					if(!val.fRight) (out["!outline"] || (out["!outline"] = {})).left = true;
 					break; // TODO
-				case 0x0043: /* BIFF2XF */ case 0x0243: /* BIFF3XF */ case 0x0443: /* BIFF4XF */
 				case 0x00e0 /* XF */:
 					XFs.push(val); break;
 				case 0x01ae /* SupBook */:
@ -301,11 +298,11 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 				case 0x0012 /* Protect */: out["!protect"] = val; break; /* for sheet or book */
 				case 0x0013 /* Password */: if(val !== 0 && opts.WTF) console.error("Password verifier: " + val); break;
 				case 0x0085 /* BoundSheet8 */: {
-					Directory[opts.biff == 4 ? opts.snames.length : val.pos] = val;
+					Directory[val.pos] = val;
 					opts.snames.push(val.name);
 				} break;
 				case 0x000a /* EOF */: {
-					if(--file_depth ? !biff4w : biff4w) break;
+					if(--file_depth) break;
 					if(range.e) {
 						if(range.e.r > 0 && range.e.c > 0) {
 							range.e.r--; range.e.c--;
@ -326,33 +323,31 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 						Workbook.Sheets.push(wsprops);
 					}
 					if(cur_sheet === "") Preamble = out; else Sheets[cur_sheet] = out;
-					out = ({}/*:any*/); if(options.dense) out["!data"] = [];
+					out = ((options.dense ? [] : {})/*:any*/);
 				} break;
 				case 0x0009: case 0x0209: case 0x0409: case 0x0809 /* BOF */: {
 					if(opts.biff === 8) opts.biff = {
-						0x0009: 2,
-						0x0209: 3,
-						0x0409: 4
+						/*::[*/0x0009/*::]*/:2,
+						/*::[*/0x0209/*::]*/:3,
+						/*::[*/0x0409/*::]*/:4
 					}[RecordType] || {
-						0x0200: 2,
-						0x0300: 3,
-						0x0400: 4,
-						0x0500: 5,
-						0x0600: 8,
-						0x0002: 2,
-						0x0007: 2
+						/*::[*/0x0200/*::]*/:2,
+						/*::[*/0x0300/*::]*/:3,
+						/*::[*/0x0400/*::]*/:4,
+						/*::[*/0x0500/*::]*/:5,
+						/*::[*/0x0600/*::]*/:8,
+						/*::[*/0x0002/*::]*/:2,
+						/*::[*/0x0007/*::]*/:2
 					}[val.BIFFVer] || 8;
 					opts.biffguess = val.BIFFVer == 0;
 					if(val.BIFFVer == 0 && val.dt == 0x1000) { opts.biff = 5; seen_codepage = true; set_cp(opts.codepage = 28591); }
-					if(opts.biff == 4 && val.dt & 0x100) biff4w = true;
 					if(opts.biff == 8 && val.BIFFVer == 0 && val.dt == 16) opts.biff = 2;
-					if(file_depth++ && !biff4w) break;
-					out = ({}/*:any*/); if(options.dense) out["!data"] = [];
+					if(file_depth++) break;
+					out = ((options.dense ? [] : {})/*:any*/);

 					if(opts.biff < 8 && !seen_codepage) { seen_codepage = true; set_cp(opts.codepage = options.codepage || 1252); }
-					if(opts.biff == 4 && biff4w) {
-						cur_sheet = (Directory[opts.snames.indexOf(cur_sheet)+1] || {name:""}).name;
-					} else if(opts.biff < 5 || val.BIFFVer == 0 && val.dt == 0x1000) {
+
+					if(opts.biff < 5 || val.BIFFVer == 0 && val.dt == 0x1000) {
 						if(cur_sheet === "") cur_sheet = "Sheet1";
 						range = {s:{r:0,c:0},e:{r:0,c:0}};
 						/* fake BoundSheet8 */
@ -371,21 +366,21 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					wsprops = {Hidden:(Directory[s]||{hs:0}).hs, name:cur_sheet };
 				} break;
 				case 0x0203 /* Number */: case 0x0003 /* BIFF2NUM */: case 0x0002 /* BIFF2INT */: {
-					if(out["!type"] == "chart") if(options.dense ? (out["!data"][val.r]||[])[val.c]: out[encode_col(val.c) + encode_row(val.r)]) ++val.c;
+					if(out["!type"] == "chart") if(options.dense ? (out[val.r]||[])[val.c]: out[encode_cell({c:val.c, r:val.r})]) ++val.c;
 					temp_val = ({ixfe: val.ixfe, XF: XFs[val.ixfe]||{}, v:val.val, t:'n'}/*:any*/);
-					if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
 					addcell({c:val.c, r:val.r}, temp_val, options);
 				} break;
 				case 0x0005: case 0x0205 /* BoolErr */: {
 					temp_val = ({ixfe: val.ixfe, XF: XFs[val.ixfe], v:val.val, t:val.t}/*:any*/);
-					if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
 					addcell({c:val.c, r:val.r}, temp_val, options);
 				} break;
 				case 0x027e /* RK */: {
 					temp_val = ({ixfe: val.ixfe, XF: XFs[val.ixfe], v:val.rknum, t:'n'}/*:any*/);
-					if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
 					addcell({c:val.c, r:val.r}, temp_val, options);
 				} break;
@ -393,7 +388,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					for(var j = val.c; j <= val.C; ++j) {
 						var ixfe = val.rkrec[j-val.c][0];
 						temp_val= ({ixfe:ixfe, XF:XFs[ixfe], v:val.rkrec[j-val.c][1], t:'n'}/*:any*/);
-						if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+						if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 						safe_format_xf(temp_val, options, wb.opts.Date1904);
 						addcell({c:j, r:val.r}, temp_val, options);
 					}
@ -408,10 +403,10 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 							var _fr = _f[0][0][1][0], _fc = _f[0][0][1][1];
 							var _fe = encode_cell({r:_fr, c:_fc});
 							if(sharedf[_fe]) temp_val.f = ""+stringify_formula(val.formula,range,val.cell,supbooks, opts);
-							else temp_val.F = ((options.dense ? (out["!data"][_fr]||[])[_fc]: out[_fe]) || {}).F;
+							else temp_val.F = ((options.dense ? (out[_fr]||[])[_fc]: out[_fe]) || {}).F;
 						} else temp_val.f = ""+stringify_formula(val.formula,range,val.cell,supbooks, opts);
 					}
-					if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
 					addcell(val.cell, temp_val, options);
 					last_formula = val;
@ -424,7 +419,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 						if(options.cellFormula) {
 							temp_val.f = ""+stringify_formula(last_formula.formula, range, last_formula.cell, supbooks, opts);
 						}
-						if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+						if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 						safe_format_xf(temp_val, options, wb.opts.Date1904);
 						addcell(last_formula.cell, temp_val, options);
 						last_formula = null;
@ -433,7 +428,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 				case 0x0021: case 0x0221 /* Array */: {
 					arrayf.push(val);
 					var _arraystart = encode_cell(val[0].s);
-					cc = options.dense ? (out["!data"][val[0].s.r]||[])[val[0].s.c] : out[_arraystart];
+					cc = options.dense ? (out[val[0].s.r]||[])[val[0].s.c] : out[_arraystart];
 					if(options.cellFormula && cc) {
 						if(!last_formula) break; /* technically unreachable */
 						if(!_arraystart || !cc) break;
@ -447,7 +442,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 						/* TODO: capture range */
 						if(!last_formula) break; /* technically unreachable */
 						sharedf[encode_cell(last_formula.cell)]= val[0];
-						cc = options.dense ? (out["!data"][last_formula.cell.r]||[])[last_formula.cell.c] : out[encode_cell(last_formula.cell)];
+						cc = options.dense ? (out[last_formula.cell.r]||[])[last_formula.cell.c] : out[encode_cell(last_formula.cell)];
 						(cc||{}).f = ""+stringify_formula(val[0], range, lastcell, supbooks, opts);
 					}
 				} break;
@ -455,13 +450,13 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					temp_val=make_cell(sst[val.isst].t, val.ixfe, 's');
 					if(sst[val.isst].h) temp_val.h = sst[val.isst].h;
 					temp_val.XF = XFs[temp_val.ixfe];
-					if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
 					addcell({c:val.c, r:val.r}, temp_val, options);
 					break;
 				case 0x0201 /* Blank */: if(options.sheetStubs) {
 					temp_val = ({ixfe: val.ixfe, XF: XFs[val.ixfe], t:'z'}/*:any*/);
-					if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
 					addcell({c:val.c, r:val.r}, temp_val, options);
 				} break;
@ -469,7 +464,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					for(var _j = val.c; _j <= val.C; ++_j) {
 						var _ixfe = val.ixfe[_j-val.c];
 						temp_val= ({ixfe:_ixfe, XF:XFs[_ixfe], t:'z'}/*:any*/);
-						if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+						if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 						safe_format_xf(temp_val, options, wb.opts.Date1904);
 						addcell({c:_j, r:val.r}, temp_val, options);
 					}
@ -478,7 +473,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 				case 0x0204 /* Label */: case 0x0004 /* BIFF2STR */:
 					temp_val=make_cell(val.val, val.ixfe, 's');
 					temp_val.XF = XFs[temp_val.ixfe];
-					if(BIFF2Fmt > 0) temp_val.z = (temp_val.XF && temp_val.XF.numFmtId) && BIFF2FmtTable[temp_val.XF.numFmtId] || BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
+					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
 					addcell({c:val.c, r:val.r}, temp_val, options);
 					break;
@ -490,17 +485,17 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					sst = val;
 				} break;
 				case 0x041e /* Format */: { /* val = [id, fmt] */
-					if(opts.biff >= 3 && opts.biff <= 4) {
+					if(opts.biff == 4) {
 						BIFF2FmtTable[BIFF2Fmt++] = val[1];
 						for(var b4idx = 0; b4idx < BIFF2Fmt + 163; ++b4idx) if(table_fmt[b4idx] == val[1]) break;
-						if(b4idx >= 163) SSF__load(val[1], BIFF2Fmt + 163);
+						if(b4idx >= 163) SSF_load(val[1], BIFF2Fmt + 163);
 					}
-					else SSF__load(val[1], val[0]);
+					else SSF_load(val[1], val[0]);
 				} break;
 				case 0x001e /* BIFF2FORMAT */: {
 					BIFF2FmtTable[BIFF2Fmt++] = val;
 					for(var b2idx = 0; b2idx < BIFF2Fmt + 163; ++b2idx) if(table_fmt[b2idx] == val) break;
-					if(b2idx >= 163) SSF__load(val, BIFF2Fmt + 163);
+					if(b2idx >= 163) SSF_load(val, BIFF2Fmt + 163);
 				} break;

 				case 0x00e5 /* MergeCells */: merges = merges.concat(val); break;
@ -512,24 +507,25 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 				case 0x01b8 /* HLink */: {
 					for(rngR = val[0].s.r; rngR <= val[0].e.r; ++rngR)
 						for(rngC = val[0].s.c; rngC <= val[0].e.c; ++rngC) {
-							cc = options.dense ? (out["!data"][rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
+							cc = options.dense ? (out[rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
 							if(cc) cc.l = val[1];
 						}
 				} break;
 				case 0x0800 /* HLinkTooltip */: {
 					for(rngR = val[0].s.r; rngR <= val[0].e.r; ++rngR)
 						for(rngC = val[0].s.c; rngC <= val[0].e.c; ++rngC) {
-							cc = options.dense ? (out["!data"][rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
+							cc = options.dense ? (out[rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
 							if(cc && cc.l) cc.l.Tooltip = val[1];
 							}
 				} break;
 				case 0x001c /* Note */: {
-					/* TODO: comment continuation (row == -1 / 0xFFFF) */
-					cc = options.dense ? (out["!data"][val[0].r]||[])[val[0].c] : out[encode_cell(val[0])];
+					if(opts.biff <= 5 && opts.biff >= 2) break; /* TODO: BIFF5 */
+					cc = options.dense ? (out[val[0].r]||[])[val[0].c] : out[encode_cell(val[0])];
+					var noteobj = objects[val[2]];
 					if(!cc) {
 						if(options.dense) {
-							if(!out["!data"][val[0].r]) out["!data"][val[0].r] = [];
-							cc = out["!data"][val[0].r][val[0].c] = ({t:"z"}/*:any*/);
+							if(!out[val[0].r]) out[val[0].r] = [];
+							cc = out[val[0].r][val[0].c] = ({t:"z"}/*:any*/);
 						} else {
 							cc = out[encode_cell(val[0])] = ({t:"z"}/*:any*/);
 						}
@ -539,12 +535,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 						range.s.c = Math.min(range.s.c, val[0].c);
 					}
 					if(!cc.c) cc.c = [];
-					if(opts.biff <= 5 && opts.biff >= 2) cmnt = {a:"SheetJ5", t:val[1]};
-					else {
-						var noteobj = objects[val[2]];
-						cmnt = {a:val[1],t:noteobj.TxO.t};
-						if(val[3] != null && !(val[3] & 0x02)) cc.c.hidden = true;
-					}
+					cmnt = {a:val[1],t:noteobj.TxO.t};
 					cc.c.push(cmnt);
 				} break;
 				case 0x087d /* XFExt */: update_xfext(XFs[val.ixfe], val.ext); break;
--- a/bits/77_parsetab.js
+++ b/bits/77_parsetab.js
--- a/bits/78_writebiff.js
+++ b/bits/78_writebiff.js
@ -31,6 +31,15 @@ function write_biff_continue(ba/*:BufArray*/, type/*:number*/, payload, length/*
 	}
 }

+function write_BIFF2Cell(out, r/*:number*/, c/*:number*/) {
+	if(!out) out = new_buf(7);
+	out.write_shift(2, r);
+	out.write_shift(2, c);
+	out.write_shift(2, 0);
+	out.write_shift(1, 0);
+	return out;
+}
+
 function write_BIFF2BERR(r/*:number*/, c/*:number*/, val, t/*:?string*/) {
 	var out = new_buf(9);
 	write_BIFF2Cell(out, r, c);
@ -47,371 +56,62 @@ function write_BIFF2LABEL(r/*:number*/, c/*:number*/, val) {
 	return out.l < out.length ? out.slice(0, out.l) : out;
 }

-function write_comments_biff2(ba/*:BufArray*/, comments/*:Array<[Comment[], number, number]>*/) {
-	comments.forEach(function(data) {
-		var text = data[0].map(function(cc) { return cc.t; }).join("");
-		// TODO: should '\n' be translated to '\r' to correct for Excel 5.0 bug when exporting to BIFF2/3 ?
-		if(text.length <= 2048) return write_biff_rec(ba, 0x001C, write_NOTE_BIFF2(text, data[1], data[2]));
-		write_biff_rec(ba, 0x001C, write_NOTE_BIFF2(text.slice(0, 2048), data[1], data[2], text.length));
-		for(var i = 2048; i < text.length; i += 2048)
-			write_biff_rec(ba, 0x001C, write_NOTE_BIFF2(text.slice(i, Math.min(i+2048, text.length)), -1, -1, Math.min(2048, text.length - i)));
-	});
-}
-
-/* TODO: BIFF3/4 use different records -- see comments*/
-function write_ws_biff2_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:number*/, opts, date1904/*:boolean*/) {
-	var ifmt = 0;
-	if(cell.z != null) {
-		ifmt = opts._BIFF2FmtTable.indexOf(cell.z);
-		if(ifmt == -1) { opts._BIFF2FmtTable.push(cell.z); ifmt = opts._BIFF2FmtTable.length - 1; }
-	}
-	var ixfe = 0;
-	if(cell.z != null) {
-		for(; ixfe < opts.cellXfs.length; ++ixfe) if(opts.cellXfs[ixfe].numFmtId == ifmt) break;
-		if(ixfe == opts.cellXfs.length) opts.cellXfs.push({numFmtId: ifmt});
-	}
+function write_ws_biff2_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:number*//*::, opts*/) {
 	if(cell.v != null) switch(cell.t) {
 		case 'd': case 'n':
-			var v = cell.t == 'd' ? datenum(parseDate(cell.v, date1904), date1904) : cell.v;
-			if(opts.biff == 2 && (v == (v|0)) && (v >= 0) && (v < 65536))
-				// 0x027E (RK) in BIFF3/4
-				write_biff_rec(ba, 0x0002, write_BIFF2INT(R, C, v, ixfe, ifmt));
-			else if(isNaN(v))
-				// 0x0205 in BIFF3/4
-				write_biff_rec(ba, 0x0005, write_BIFF2BERR(R, C, 0x24, "e")); // #NUM!
-			else if(!isFinite(v))
-				// 0x0205 in BIFF3/4
-				write_biff_rec(ba, 0x0005, write_BIFF2BERR(R, C, 0x07, "e")); // #DIV/0!
+			var v = cell.t == 'd' ? datenum(parseDate(cell.v)) : cell.v;
+			if((v == (v|0)) && (v >= 0) && (v < 65536))
+				write_biff_rec(ba, 0x0002, write_BIFF2INT(R, C, v));
 			else
-				// 0x0203 in BIFF3/4
-				write_biff_rec(ba, 0x0003, write_BIFF2NUM(R,C, v, ixfe, ifmt));
+				write_biff_rec(ba, 0x0003, write_BIFF2NUM(R,C, v));
 			return;
-		case 'b': case 'e':
-			// 0x0205 in BIFF3/4
-			write_biff_rec(ba, 0x0005, write_BIFF2BERR(R, C, cell.v, cell.t)); return;
+		case 'b': case 'e': write_biff_rec(ba, 0x0005, write_BIFF2BERR(R, C, cell.v, cell.t)); return;
 		/* TODO: codepage, sst */
 		case 's': case 'str':
-			// 0x0204 in BIFF3/4
-			write_biff_rec(ba, 0x0004, write_BIFF2LABEL(R, C, cell.v == null ? "" : String(cell.v).slice(0,255)));
+			write_biff_rec(ba, 0x0004, write_BIFF2LABEL(R, C, (cell.v||"").slice(0,255)));
 			return;
 	}
-	// 0x0201 in BIFF3/4
 	write_biff_rec(ba, 0x0001, write_BIFF2Cell(null, R, C));
 }

-function write_ws_biff2(ba/*:BufArray*/, ws/*:Worksheet*/, idx/*:number*/, opts, wb/*:Workbook*/) {
-	var dense = ws["!data"] != null;
-	var range = safe_decode_range(ws['!ref'] || "A1"), rr = "", cols/*:Array<string>*/ = [];
+function write_ws_biff2(ba/*:BufArray*/, ws/*:Worksheet*/, idx/*:number*/, opts/*::, wb:Workbook*/) {
+	var dense = Array.isArray(ws);
+	var range = safe_decode_range(ws['!ref'] || "A1"), ref/*:string*/, rr = "", cols/*:Array<string>*/ = [];
 	if(range.e.c > 0xFF || range.e.r > 0x3FFF) {
 		if(opts.WTF) throw new Error("Range " + (ws['!ref'] || "A1") + " exceeds format limit A1:IV16384");
 		range.e.c = Math.min(range.e.c, 0xFF);
 		range.e.r = Math.min(range.e.c, 0x3FFF);
+		ref = encode_range(range);
 	}
-	var date1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;
-	var row = [], comments = [];
-	/* TODO: 0x0000 / 0x0200 dimensions? */
-	for(var C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
 	for(var R = range.s.r; R <= range.e.r; ++R) {
-		if(dense) row = ws["!data"][R] || [];
 		rr = encode_row(R);
-		for(C = range.s.c; C <= range.e.c; ++C) {
-			var cell = dense ? row[C] : ws[cols[C] + rr];
+		for(var C = range.s.c; C <= range.e.c; ++C) {
+			if(R === range.s.r) cols[C] = encode_col(C);
+			ref = cols[C] + rr;
+			var cell = dense ? (ws[R]||[])[C] : ws[ref];
 			if(!cell) continue;
 			/* write cell */
-			write_ws_biff2_cell(ba, cell, R, C, opts, date1904);
-			if(cell.c) comments.push([cell.c, R, C]);
+			write_ws_biff2_cell(ba, cell, R, C, opts);
 		}
 	}
-
-	/* ... 0x12 0x19 0x13 (Password) */
-	write_comments_biff2(ba, comments);
-	/* 0x3d (Window1) ... */
 }

 /* Based on test files */
 function write_biff2_buf(wb/*:Workbook*/, opts/*:WriteOpts*/) {
 	var o = opts || {};
-
+	if(DENSE != null && o.dense == null) o.dense = DENSE;
 	var ba = buf_array();
 	var idx = 0;
 	for(var i=0;i<wb.SheetNames.length;++i) if(wb.SheetNames[i] == o.sheet) idx=i;
 	if(idx == 0 && !!o.sheet && wb.SheetNames[0] != o.sheet) throw new Error("Sheet not found: " + o.sheet);
 	write_biff_rec(ba, (o.biff == 4 ? 0x0409 : (o.biff == 3 ? 0x0209 : 0x0009)), write_BOF(wb, 0x10, o));
-	if(((wb.Workbook||{}).WBProps||{}).date1904) write_biff_rec(ba, 0x0022, writebool(true));
-	o.cellXfs = [{numFmtId: 0}];
-	o._BIFF2FmtTable/*:Array<string>*/ = ["General"]; o._Fonts = [];
-	var body = buf_array();
-	write_ws_biff2(body, wb.Sheets[wb.SheetNames[idx]], idx, o, wb);
-
-	o._BIFF2FmtTable.forEach(function(f) {
-		if(o.biff <= 3) write_biff_rec(ba, 0x001E, write_BIFF2Format(f));
-		else write_biff_rec(ba, 0x041E, write_BIFF4Format(f));
-	});
-	o.cellXfs.forEach(function(xf) {
-		switch(o.biff) {
-			case 2: write_biff_rec(ba, 0x0043, write_BIFF2XF(xf)); break;
-			case 3: write_biff_rec(ba, 0x0243, write_BIFF3XF(xf)); break;
-			case 4: write_biff_rec(ba, 0x0443, write_BIFF4XF(xf)); break;
-		}
-	});
-	delete o._BIFF2FmtTable; delete o.cellXfs; delete o._Fonts;
-
-	ba.push(body.end());
+	/* ... */
+	write_ws_biff2(ba, wb.Sheets[wb.SheetNames[idx]], idx, o, wb);
+	/* ... */
 	write_biff_rec(ba, 0x000A);
 	return ba.end();
 }

-var b8oid = 1, b8ocnts/*:Array<[number, number, number]>*/ = [];
-function write_MsoDrawingGroup() {
-	var buf = new_buf(82 + 8 * b8ocnts.length);
-	/* [MS-ODRAW] 2.2.12 OfficeArtDggContainer */
-	buf.write_shift(2, 0x0F);
-	buf.write_shift(2, 0xF000);
-	buf.write_shift(4, 74 + 8 * b8ocnts.length);
-	/* 2.2.48 OfficeArtFDGGBlock */
-	{
-		buf.write_shift(2, 0);
-		buf.write_shift(2, 0xF006);
-		buf.write_shift(4, 16 + 8 * b8ocnts.length);
-		/* 2.2.47 OfficeArtFDGG */
-		{
-			buf.write_shift(4, b8oid);
-			buf.write_shift(4, b8ocnts.length+1);
-			var acc = 0; for(var i = 0; i < b8ocnts.length; ++i) acc += (b8ocnts[i] && b8ocnts[i][1] || 0); buf.write_shift(4, acc);
-			buf.write_shift(4, b8ocnts.length);
-		}
-		/* 2.2.46 OfficeArtIDCL + */
-		b8ocnts.forEach(function(b8) {
-			buf.write_shift(4, b8[0]);
-			buf.write_shift(4, b8[2]);
-		});
-	}
-	/* 2.2.9 OfficeArtFOPT */
-	{
-		buf.write_shift(2, 0x33); // 0x03 | (3 << 4)
-		buf.write_shift(2, 0xF00B);
-		buf.write_shift(4, 0x12); // 3 * 6
-		/* 2.3.21.15 Text Boolean Properties */
-		buf.write_shift(2, 0xBF); buf.write_shift(4, 0x00080008);
-		/* 2.3.7.2 fillColor */
-		buf.write_shift(2, 0x0181); buf.write_shift(4, 0x08000041);
-		/* 2.3.8.1 lineColor */
-		buf.write_shift(2, 0x01C0); buf.write_shift(4, 0x08000040);
-	}
-	/* 2.2.45 OfficeArtSplitMenuColorContainer */
-	{
-		buf.write_shift(2, 0x40);
-		buf.write_shift(2, 0xF11E);
-		buf.write_shift(4, 16);
-		buf.write_shift(4, 0x0800000D);
-		buf.write_shift(4, 0x0800000C);
-		buf.write_shift(4, 0x08000017);
-		buf.write_shift(4, 0x100000F7);
-	}
-	return buf;
-}
-function write_comments_biff8(ba/*:BufArray*/, comments/*:Array<[Comment[], number, number]>*/) {
-	var notes/*:Array<RawData>*/ = [], sz = 0, pl = buf_array(), baseid = b8oid;
-	var _oasc;
-	comments.forEach(function(c, ci) {
-		var author = "";
-		var text = c[0].map(function(t) { if(t.a && !author) author = t.a; return t.t; }).join("");
-		++b8oid;
-
-		/* 2.2.14 OfficeArtSpContainer */
-		{
-			var oasc = new_buf(0x96);
-			oasc.write_shift(2, 0x0F);
-			oasc.write_shift(2, 0xF004);
-			oasc.write_shift(4, 0x96);
-			/* 2.2.40 OfficeArtFSP */
-			{
-				oasc.write_shift(2, 0xca2); // 0x02 | (0xca << 4)
-				oasc.write_shift(2, 0xF00A);
-				oasc.write_shift(4, 8);
-				oasc.write_shift(4, b8oid);
-				oasc.write_shift(4, 0xA00);
-			}
-			/* 2.2.9 OfficeArtFOPT */
-			{
-				oasc.write_shift(2, 0xE3); // 0x03 | (14 << 4)
-				oasc.write_shift(2, 0xF00B);
-				oasc.write_shift(4, 0x54); // 14 * 6
-				/* 2.3.21.1 ITxid */
-				oasc.write_shift(2, 0x80); oasc.write_shift(4, 0);
-				/* 2.3.21.12 txdir */
-				oasc.write_shift(2, 0x8B); oasc.write_shift(4, 0x02);
-				/* 2.3.21.15 Text Boolean Properties */
-				oasc.write_shift(2, 0xBF); oasc.write_shift(4, 0x00080008);
-				/* 2.3.6.30 cxk */
-				oasc.write_shift(2, 0x0158); oasc.l += 4;
-				/* 2.3.7.2 fillColor */
-				oasc.write_shift(2, 0x0181); oasc.write_shift(4, 0x08000050);
-				/* 2.3.7.4 fillBackColor */
-				oasc.write_shift(2, 0x0183); oasc.write_shift(4, 0x08000050);
-				/* 2.3.7.6 fillCrMod */
-				oasc.write_shift(2, 0x0185); oasc.write_shift(4, 0x100000F4);
-				/* 2.3.7.43 Fill Style Boolean Properties */
-				oasc.write_shift(2, 0x01BF); oasc.write_shift(4, 0x00100010);
-				/* 2.3.8.1 lineColor */
-				oasc.write_shift(2, 0x01C0); oasc.write_shift(4, 0x08000051);
-				/* 2.3.8.4 lineCrMod */
-				oasc.write_shift(2, 0x01C3); oasc.write_shift(4, 0x100000F4);
-				/* 2.3.13.2 shadowColor */
-				oasc.write_shift(2, 0x0201); oasc.write_shift(4, 0x08000051);
-				/* 2.3.13.4 shadowCrMod */
-				oasc.write_shift(2, 0x0203); oasc.write_shift(4, 0x100000F4);
-				/* 2.3.13.23 Shadow Style Boolean Properties */
-				oasc.write_shift(2, 0x023F); oasc.write_shift(4, 0x00030001);
-				/* 2.3.4.44 Group Shape Boolean Properties */
-				oasc.write_shift(2, 0x03BF); oasc.write_shift(4, 0x00020000 | (c[0].hidden ? 2 : 0));
-			}
-			/* [MS-XLS] 2.5.193 OfficeArtClientAnchorSheet */
-			{
-				oasc.l += 2;
-				oasc.write_shift(2, 0xF010);
-				oasc.write_shift(4, 0x12);
-				oasc.write_shift(2, 0x3); // do not move or size with cells
-				oasc.write_shift(2, c[2] + 2); oasc.l += 2;
-				oasc.write_shift(2, c[1] + 1); oasc.l += 2;
-				oasc.write_shift(2, c[2] + 4); oasc.l += 2;
-				oasc.write_shift(2, c[1] + 5); oasc.l += 2;
-			}
-			/* [MS-XLS] 2.5.194 OfficeArtClientData */
-			{
-				oasc.l += 2;
-				oasc.write_shift(2, 0xF011);
-				oasc.l += 4;
-			}
-			oasc.l = 0x96;
-			if(ci == 0) /* write_biff_rec(pl, 0x003C, oasc); */ _oasc = oasc;
-			else write_biff_rec(pl, 0x00EC, oasc);
-		}
-		sz += 0x96;
-
-		/* [MS-XLS] 2.4.181 Obj */
-		{
-			var obj = new_buf(52); // 22 + 26 + 4
-			/* [MS-XLS] 2.5.143 FtCmo */
-			obj.write_shift(2, 0x15);
-			obj.write_shift(2, 0x12);
-			obj.write_shift(2, 0x19);
-			obj.write_shift(2, b8oid);
-			obj.write_shift(2, 0);
-			obj.l = 22;
-			/* [MS-XLS] 2.5.149 FtNts */
-			obj.write_shift(2, 0x0D);
-			obj.write_shift(2, 0x16);
-			obj.write_shift(4, 0x62726272);
-			obj.write_shift(4, 0x95374305);
-			obj.write_shift(4, 0x80301328);
-			obj.write_shift(4, 0x69696904 + b8oid*256);
-			obj.write_shift(2,0);
-			obj.write_shift(4,0);
-			// reserved
-			obj.l += 4;
-			write_biff_rec(pl, 0x005D, obj);
-		}
-
-		/* [MS-XLS] 2.5.195 OfficeArtClientTextbox */
-		{
-			var oact = new_buf(8);
-			oact.l += 2;
-			oact.write_shift(2, 0xF00D);
-			oact.l += 4;
-			write_biff_rec(pl, 0x00EC, oact);
-		}
-		sz += 8;
-
-		/* [MS-XLS] 2.4.329 TxO */
-		{
-			var txo = new_buf(18);
-			txo.write_shift(2, 0x12);
-			txo.l += 8;
-			txo.write_shift(2, text.length);
-			txo.write_shift(2, 0x10);
-			txo.l += 4;
-			write_biff_rec(pl, 0x01b6, txo);
-			/* text continue record TODO: switch to wide strings */
-			{
-				var cont = new_buf(1 + text.length);
-				cont.write_shift(1, 0);
-				cont.write_shift(text.length, text, "sbcs");
-				write_biff_rec(pl, 0x003C, cont);
-			}
-			/* formatting continue records */
-			{
-				var conf = new_buf(0x10);
-				conf.l += 8;
-				conf.write_shift(2, text.length);
-				conf.l += 6;
-				write_biff_rec(pl, 0x003C, conf);
-			}
-		}
-
-		/* 2.4.179 Note */
-		{
-			var notesh = new_buf(12 + author.length);
-			notesh.write_shift(2, c[1]);
-			notesh.write_shift(2, c[2]);
-			notesh.write_shift(2, 0 | (c[0].hidden ? 0 : 2));
-			notesh.write_shift(2, b8oid);
-			notesh.write_shift(2, author.length);
-			notesh.write_shift(1, 0);
-			notesh.write_shift(author.length, author, "sbcs");
-			notesh.l ++;
-			notes.push(notesh);
-		}
-	});
-	/* [MS-ODRAW] 2.2.13 OfficeArtDgContainer */
-	{
-		var hdr = new_buf(80);
-		hdr.write_shift(2, 0x0F);
-		hdr.write_shift(2, 0xF002);
-		hdr.write_shift(4, sz + hdr.length - 8);
-		/* [MS-ODRAW] 2.2.49 OfficeArtFDG */
-		{
-			hdr.write_shift(2, 0x10);
-			hdr.write_shift(2, 0xF008);
-			hdr.write_shift(4, 0x08);
-			hdr.write_shift(4, comments.length + 1);
-			hdr.write_shift(4, b8oid);
-		}
-		/* [MS-ODRAW] 2.2.16 OfficeArtSpgrContainer */
-		{
-			hdr.write_shift(2, 0x0f);
-			hdr.write_shift(2, 0xF003);
-			hdr.write_shift(4, sz + 0x30);
-			/* [MS-ODRAW] 2.2.14 OfficeArtSpContainer */
-			{
-				hdr.write_shift(2, 0x0f);
-				hdr.write_shift(2, 0xF004);
-				hdr.write_shift(4, 0x28);
-				/* [MS-ODRAW] 2.2.38 OfficeArtFSPGR */
-				{
-					hdr.write_shift(2, 0x01);
-					hdr.write_shift(2, 0xF009);
-					hdr.write_shift(4, 0x10);
-					hdr.l += 16;
-				}
-				/* [MS-ODRAW] 2.2.40 OfficeArtFSP */
-				{
-					hdr.write_shift(2, 0x02);
-					hdr.write_shift(2, 0xF00A);
-					hdr.write_shift(4, 0x08);
-					hdr.write_shift(4, baseid);
-					hdr.write_shift(4, 0x05);
-				}
-			}
-		}
-		write_biff_rec(ba, 0x00EC, /* hdr */ _oasc ? bconcat([hdr, _oasc]) : hdr);
-	}
-	ba.push(pl.end());
-	notes.forEach(function(n) { write_biff_rec(ba, 0x001C, n); });
-	b8ocnts.push([baseid, comments.length + 1, b8oid]);
-	++b8oid;
-}
-
 function write_FONTS_biff8(ba, data, opts) {
 	write_biff_rec(ba, 0x0031 /* Font */, write_Font({
 		sz:12,
@ -473,7 +173,7 @@ function write_ws_cols_biff8(ba, cols) {
 	});
 }

-function write_ws_biff8_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:number*/, opts, date1904/*:boolean*/) {
+function write_ws_biff8_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:number*/, opts) {
 	var os = 16 + get_cell_style(opts.cellXfs, cell, opts);
 	if(cell.v == null && !cell.bf) {
 		write_biff_rec(ba, 0x0201 /* Blank */, write_XLSCell(R, C, os));
@ -482,11 +182,9 @@ function write_ws_biff8_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:n
 	if(cell.bf) write_biff_rec(ba, 0x0006 /* Formula */, write_Formula(cell, R, C, opts, os));
 	else switch(cell.t) {
 		case 'd': case 'n':
-			var v = cell.t == 'd' ? datenum(parseDate(cell.v, date1904), date1904) : cell.v;
-			if(isNaN(v)) write_biff_rec(ba, 0x0205 /* BoolErr */, write_BoolErr(R, C, 0x24, os, opts, "e")); // #NUM!
-			else if(!isFinite(v)) write_biff_rec(ba, 0x0205 /* BoolErr */, write_BoolErr(R, C, 0x07, os, opts, "e")); // #DIV/0!
+			var v = cell.t == 'd' ? datenum(parseDate(cell.v)) : cell.v;
 			/* TODO: emit RK as appropriate */
-			else write_biff_rec(ba, 0x0203 /* Number */, write_Number(R, C, v, os, opts));
+			write_biff_rec(ba, 0x0203 /* Number */, write_Number(R, C, v, os, opts));
 			break;
 		case 'b': case 'e':
 			write_biff_rec(ba, 0x0205 /* BoolErr */, write_BoolErr(R, C, cell.v, os, opts, cell.t));
@ -494,9 +192,9 @@ function write_ws_biff8_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:n
 		/* TODO: codepage, sst */
 		case 's': case 'str':
 			if(opts.bookSST) {
-				var isst = get_sst_id(opts.Strings, cell.v == null ? "" : String(cell.v), opts.revStrings);
+				var isst = get_sst_id(opts.Strings, cell.v, opts.revStrings);
 				write_biff_rec(ba, 0x00fd /* LabelSst */, write_LabelSst(R, C, isst, os, opts));
-			} else write_biff_rec(ba, 0x0204 /* Label */, write_Label(R, C, (cell.v == null ? "" : String(cell.v)).slice(0,255), os, opts));
+			} else write_biff_rec(ba, 0x0204 /* Label */, write_Label(R, C, (cell.v||"").slice(0,255), os, opts));
 			break;
 		default:
 			write_biff_rec(ba, 0x0201 /* Blank */, write_XLSCell(R, C, os));
@ -509,7 +207,7 @@ function write_ws_biff8(idx/*:number*/, opts, wb/*:Workbook*/) {
 	var s = wb.SheetNames[idx], ws = wb.Sheets[s] || {};
 	var _WB/*:WBWBProps*/ = ((wb||{}).Workbook||{}/*:any*/);
 	var _sheet/*:WBWSProp*/ = ((_WB.Sheets||[])[idx]||{}/*:any*/);
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	var b8 = opts.biff == 8;
 	var ref/*:string*/, rr = "", cols/*:Array<string>*/ = [];
 	var range = safe_decode_range(ws['!ref'] || "A1");
@ -540,31 +238,24 @@ function write_ws_biff8(idx/*:number*/, opts, wb/*:Workbook*/) {
 	/* ... */
 	if(b8) write_ws_cols_biff8(ba, ws["!cols"]);
 	/* ... */
-	write_biff_rec(ba, 0x0200 /* Dimensions */, write_Dimensions(range, opts));
+	write_biff_rec(ba, 0x200, write_Dimensions(range, opts));
 	/* ... */

-	var date1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;
 	if(b8) ws['!links'] = [];
-	for(var C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
-	var comments = [];
-	var row = [];
 	for(var R = range.s.r; R <= range.e.r; ++R) {
-		if(dense) row = ws["!data"][R] || [];
 		rr = encode_row(R);
-		for(C = range.s.c; C <= range.e.c; ++C) {
+		for(var C = range.s.c; C <= range.e.c; ++C) {
+			if(R === range.s.r) cols[C] = encode_col(C);
 			ref = cols[C] + rr;
-			var cell = dense ? row[C] : ws[ref];
+			var cell = dense ? (ws[R]||[])[C] : ws[ref];
 			if(!cell) continue;
 			/* write cell */
-			write_ws_biff8_cell(ba, cell, R, C, opts, date1904);
+			write_ws_biff8_cell(ba, cell, R, C, opts);
 			if(b8 && cell.l) ws['!links'].push([ref, cell.l]);
-			if(cell.c) comments.push([cell.c, R, C]);
 		}
 	}
 	var cname/*:string*/ = _sheet.CodeName || _sheet.name || s;
 	/* ... */
-	if(b8) write_comments_biff8(ba, comments); else write_comments_biff2(ba, comments);
-	/* ... */
 	if(b8) write_biff_rec(ba, 0x023e /* Window2 */, write_Window2((_WB.Views||[])[0]));
 	/* ... */
 	if(b8 && (ws['!merges']||[]).length) write_biff_rec(ba, 0x00e5 /* MergeCells */, write_MergeCells(ws['!merges']));
@ -632,13 +323,11 @@ function write_biff8_global(wb/*:Workbook*/, bufs, opts/*:WriteOpts*/) {

 	var C = buf_array();
 	/* METADATA [MTRSettings] [ForceFullCalculation] */
-	if(b8) write_biff_rec(C, 0x008C /* Country */, write_Country());
-	/* *SUPBOOK *LBL *RTD [RecalcId] *HFPicture */
+	if(b8) write_biff_rec(C, 0x008C, write_Country());
+	/* *SUPBOOK *LBL *RTD [RecalcId] *HFPicture *MSODRAWINGGROUP */

-	/* BIFF8: MsoDrawingGroup [*Continue] */
-	if(b8 && b8ocnts.length) write_biff_rec(C, 0x00EB /* MsoDrawingGroup */, write_MsoDrawingGroup());
 	/* BIFF8: [SST *Continue] ExtSST */
-	if(b8 && opts.Strings) write_biff_continue(C, 0x00FC /* SST */, write_SST(opts.Strings, opts));
+	if(b8 && opts.Strings) write_biff_continue(C, 0x00FC, write_SST(opts.Strings, opts));

 	/* *WebPub [WOpt] [CrErr] [BookExt] *FeatHdr *DConn [THEME] [CompressPictures] [Compat12] [GUIDTypeLib] */
 	write_biff_rec(C, 0x000A /* EOF */);
@ -679,7 +368,6 @@ function write_biff8_buf(wb/*:Workbook*/, opts/*:WriteOpts*/) {
 		o.ssf = wb.SSF;
 	}

-	b8oid = 1; b8ocnts = [];
 	o.Strings = /*::((*/[]/*:: :any):SST)*/; o.Strings.Count = 0; o.Strings.Unique = 0;
 	fix_write_opts(o);

@ -699,7 +387,7 @@ function write_biff_buf(wb/*:Workbook*/, opts/*:WriteOpts*/) {
 		if(!ws || !ws["!ref"]) continue;
 		var range = decode_range(ws["!ref"]);
 		if(range.e.c > 255) { // note: 255 is IV
-			if(typeof console != "undefined" && console.error) console.error("Worksheet '" + wb.SheetNames[i] + "' extends beyond column IV (255).  Data may be lost.");
+		if(typeof console != "undefined" && console.error) console.error("Worksheet '" + wb.SheetNames[i] + "' extends beyond column IV (255).  Data may be lost.");
 		}
 	}

--- a/bits/79_html.js
+++ b/bits/79_html.js
@ -1,14 +1,14 @@
 /* note: browser DOM element cannot see mso- style attrs, must parse */
 function html_to_sheet(str/*:string*/, _opts)/*:Workbook*/ {
 	var opts = _opts || {};
-	var dense = (opts.dense != null) ? opts.dense : DENSE;
-	var ws/*:Worksheet*/ = ({}/*:any*/); if(dense) ws["!data"] = [];
-	str = str_remove_ng(str, "<!--", "-->");
+	if(DENSE != null && opts.dense == null) opts.dense = DENSE;
+	var ws/*:Worksheet*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
+	str = str.replace(/<!--.*?-->/g, "");
 	var mtch/*:any*/ = str.match(/<table/i);
 	if(!mtch) throw new Error("Invalid HTML: could not find <table>");
 	var mtch2/*:any*/ = str.match(/<\/table/i);
 	var i/*:number*/ = mtch.index, j/*:number*/ = mtch2 && mtch2.index || str.length;
-	var rows = split_regex(str.slice(i, j), /(:?<tr[^<>]*>)/i, "<tr>");
+	var rows = split_regex(str.slice(i, j), /(:?<tr[^>]*>)/i, "<tr>");
 	var R = -1, C = 0, RS = 0, CS = 0;
 	var range/*:Range*/ = {s:{r:10000000, c:10000000},e:{r:0,c:0}};
 	var merges/*:Array<Range>*/ = [];
@ -45,12 +45,10 @@ function html_to_sheet(str/*:string*/, _opts)/*:Workbook*/ {
 			else if(!isNaN(fuzzynum(m))) o = {t:'n', v:fuzzynum(m)};
 			else if(!isNaN(fuzzydate(m).getDate())) {
 				o = ({t:'d', v:parseDate(m)}/*:any*/);
-				if(opts.UTC === false) o.v = utc_to_local(o.v);
 				if(!opts.cellDates) o = ({t:'n', v:datenum(o.v)}/*:any*/);
 				o.z = opts.dateNF || table_fmt[14];
 			}
-			if(o.cellText !== false) o.w = m;
-			if(dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = o; }
+			if(opts.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = o; }
 			else ws[encode_cell({r:R, c:C})] = o;
 			C += CS;
 		}
@ -62,8 +60,6 @@ function html_to_sheet(str/*:string*/, _opts)/*:Workbook*/ {
 function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o/*:Sheet2HTMLOpts*/)/*:string*/ {
 	var M/*:Array<Range>*/ = (ws['!merges'] ||[]);
 	var oo/*:Array<string>*/ = [];
-	var sp = ({}/*:any*/);
-	var dense = ws["!data"] != null;
 	for(var C = r.s.c; C <= r.e.c; ++C) {
 		var RS = 0, CS = 0;
 		for(var j = 0; j < M.length; ++j) {
@ -73,20 +69,19 @@ function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o/*:Sheet2HT
 			RS = M[j].e.r - M[j].s.r + 1; CS = M[j].e.c - M[j].s.c + 1; break;
 		}
 		if(RS < 0) continue;
-		var coord = encode_col(C) + encode_row(R);
-		var cell = dense ? (ws["!data"][R]||[])[C] : ws[coord];
+		var coord = encode_cell({r:R,c:C});
+		var cell = o.dense ? (ws[R]||[])[C] : ws[coord];
 		/* TODO: html entities */
 		var w = (cell && cell.v != null) && (cell.h || escapehtml(cell.w || (format_cell(cell), cell.w) || "")) || "";
-		sp = ({}/*:any*/);
+		var sp = ({}/*:any*/);
 		if(RS > 1) sp.rowspan = RS;
 		if(CS > 1) sp.colspan = CS;
 		if(o.editable) w = '<span contenteditable="true">' + w + '</span>';
 		else if(cell) {
 			sp["data-t"] = cell && cell.t || 'z';
-			// note: data-v is unaffected by the timezone interpretation
-			if(cell.v != null) sp["data-v"] = escapehtml(cell.v instanceof Date ? cell.v.toISOString() : cell.v);
+			if(cell.v != null) sp["data-v"] = cell.v;
 			if(cell.z != null) sp["data-z"] = cell.z;
-			if(cell.l && (cell.l.Target || "#").charAt(0) != "#") w = '<a href="' + escapehtml(cell.l.Target) +'">' + w + '</a>';
+			if(cell.l && (cell.l.Target || "#").charAt(0) != "#") w = '<a href="' + cell.l.Target +'">' + w + '</a>';
 		}
 		sp.id = (o.id || "sjs") + "-" + coord;
 		oo.push(writextag('td', w, sp));
@ -99,16 +94,11 @@ var HTML_BEGIN = '<html><head><meta charset="utf-8"/><title>SheetJS Table Export
 var HTML_END = '</body></html>';

 function html_to_workbook(str/*:string*/, opts)/*:Workbook*/ {
-	var mtch = str_match_xml_ig(str, "table");
+	var mtch = str.match(/<table[\s\S]*?>[\s\S]*?<\/table>/gi);
 	if(!mtch || mtch.length == 0) throw new Error("Invalid HTML: could not find <table>");
-	if(mtch.length == 1) {
-		var w = sheet_to_workbook(html_to_sheet(mtch[0], opts), opts);
-		w.bookType = "html";
-		return w;
-	}
+	if(mtch.length == 1) return sheet_to_workbook(html_to_sheet(mtch[0], opts), opts);
 	var wb = book_new();
 	mtch.forEach(function(s, idx) { book_append_sheet(wb, html_to_sheet(s, opts), "Sheet" + (idx+1)); });
-	wb.bookType = "html";
 	return wb;
 }

@ -122,22 +112,17 @@ function sheet_to_html(ws/*:Worksheet*/, opts/*:?Sheet2HTMLOpts*//*, wb:?Workboo
 	var header = o.header != null ? o.header : HTML_BEGIN;
 	var footer = o.footer != null ? o.footer : HTML_END;
 	var out/*:Array<string>*/ = [header];
-	var r = decode_range(ws['!ref'] || "A1");
+	var r = decode_range(ws['!ref']);
+	o.dense = Array.isArray(ws);
 	out.push(make_html_preamble(ws, r, o));
-	if(ws["!ref"]) for(var R = r.s.r; R <= r.e.r; ++R) out.push(make_html_row(ws, r, R, o));
+	for(var R = r.s.r; R <= r.e.r; ++R) out.push(make_html_row(ws, r, R, o));
 	out.push("</table>" + footer);
 	return out.join("");
 }

 function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/*:Worksheet*/ {
-	var rows/*:HTMLCollection<HTMLTableRowElement>*/ = table.rows;
-	if(!rows) {
-		/* not an HTML TABLE */
-		throw "Unsupported origin when " + table.tagName + " is not a TABLE";
-	}
-
 	var opts = _opts || {};
-	var dense = ws["!data"] != null;
+	if(DENSE != null) opts.dense = DENSE;
 	var or_R = 0, or_C = 0;
 	if(opts.origin != null) {
 		if(typeof opts.origin == 'number') or_R = opts.origin;
@ -147,6 +132,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 		}
 	}

+	var rows/*:HTMLCollection<HTMLTableRowElement>*/ = table.getElementsByTagName('tr');
 	var sheetRows = Math.min(opts.sheetRows||10000000, rows.length);
 	var range/*:Range*/ = {s:{r:0,c:0},e:{r:or_R,c:or_C}};
 	if(ws["!ref"]) {
@ -167,7 +153,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 			if (opts.display) continue;
 			rowinfo[R] = {hidden: true};
 		}
-		var elts/*:HTMLCollection<HTMLTableCellElement>*/ = (row.cells);
+		var elts/*:HTMLCollection<HTMLTableCellElement>*/ = (row.children/*:any*/);
 		for(_C = C = 0; _C < elts.length; ++_C) {
 			var elt/*:HTMLTableCellElement*/ = elts[_C];
 			if (opts.display && is_dom_element_hidden(elt)) continue;
@ -190,7 +176,6 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 				else if(!isNaN(fuzzynum(v))) o = {t:'n', v:fuzzynum(v)};
 				else if(!isNaN(fuzzydate(v).getDate())) {
 					o = ({t:'d', v:parseDate(v)}/*:any*/);
-					if(opts.UTC) o.v = local_to_utc(o.v);
 					if(!opts.cellDates) o = ({t:'n', v:datenum(o.v)}/*:any*/);
 					o.z = opts.dateNF || table_fmt[14];
 				}
@ -202,8 +187,8 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 			if(Aelts && Aelts.length) for(var Aelti = 0; Aelti < Aelts.length; ++Aelti)	if(Aelts[Aelti].hasAttribute("href")) {
 				l = Aelts[Aelti].getAttribute("href"); if(l.charAt(0) != "#") break;
 			}
-			if(l && l.charAt(0) != "#" &&	l.slice(0, 11).toLowerCase() != 'javascript:') o.l = ({ Target: l });
-			if(dense) { if(!ws["!data"][R + or_R]) ws["!data"][R + or_R] = []; ws["!data"][R + or_R][C + or_C] = o; }
+			if(l && l.charAt(0) != "#") o.l = ({ Target: l });
+			if(opts.dense) { if(!ws[R + or_R]) ws[R + or_R] = []; ws[R + or_R][C + or_C] = o; }
 			else ws[encode_cell({c:C + or_C, r:R + or_R})] = o;
 			if(range.e.c < C + or_C) range.e.c = C + or_C;
 			C += CS;
@ -219,14 +204,12 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/

 function parse_dom_table(table/*:HTMLElement*/, _opts/*:?any*/)/*:Worksheet*/ {
 	var opts = _opts || {};
-	var ws/*:Worksheet*/ = ({}/*:any*/); if(opts.dense) ws["!data"] = [];
+	var ws/*:Worksheet*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
 	return sheet_add_dom(ws, table, _opts);
 }

 function table_to_book(table/*:HTMLElement*/, opts/*:?any*/)/*:Workbook*/ {
-	var o = sheet_to_workbook(parse_dom_table(table, opts), opts);
-	//o.bookType = "dom"; // TODO: define a type for this
-	return o;
+	return sheet_to_workbook(parse_dom_table(table, opts), opts);
 }

 function is_dom_element_hidden(element/*:HTMLElement*/)/*:boolean*/ {
--- a/bits/80_parseods.js
+++ b/bits/80_parseods.js
@ -5,258 +5,51 @@ function parse_text_p(text/*:string*//*::, tag*/)/*:Array<any>*/ {
 		.replace(/[\t\r\n]/g, " ").trim().replace(/ +/g, " ")
 		.replace(/<text:s\/>/g," ")
 		.replace(/<text:s text:c="(\d+)"\/>/g, function($$,$1) { return Array(parseInt($1,10)+1).join(" "); })
-		.replace(/<text:tab[^<>]*\/>/g,"\t")
+		.replace(/<text:tab[^>]*\/>/g,"\t")
 		.replace(/<text:line-break\/>/g,"\n");
-	var v = unescapexml(fixed.replace(/<[^<>]*>/g,""));
+	var v = unescapexml(fixed.replace(/<[^>]*>/g,""));

 	return [v];
 }

-/* Note: ODS can stick styles in content.xml or styles.xml, FODS blurs lines */
-function parse_ods_styles(d/*:string*/, _opts, _nfm) {
-	var number_format_map = _nfm || {};
-	var str = xlml_normalize(d);
-	xlmlregex.lastIndex = 0;
-	str = remove_doctype(str_remove_ng(str, "<!--", "-->"));
-	var Rn, NFtag, NF = "", tNF = "", y, etpos = 0, tidx = -1, infmt = false, payload = "";
-	while((Rn = xlmlregex.exec(str))) {
-		switch((Rn[3]=Rn[3].replace(/_[\s\S]*$/,""))) {
-		/* Number Format Definitions */
-		case 'number-style': // <number:number-style> 16.29.2
-		case 'currency-style': // <number:currency-style> 16.29.8
-		case 'percentage-style': // <number:percentage-style> 16.29.10
-		case 'date-style': // <number:date-style> 16.29.11
-		case 'time-style': // <number:time-style> 16.29.19
-		case 'text-style': // <number:text-style> 16.29.26
-			if(Rn[1]==='/') {
-				infmt = false;
-				if(NFtag['truncate-on-overflow'] == "false") {
-					if(NF.match(/h/)) NF = NF.replace(/h+/, "[$&]");
-					else if(NF.match(/m/)) NF = NF.replace(/m+/, "[$&]");
-					else if(NF.match(/s/)) NF = NF.replace(/s+/, "[$&]");
-				}
-				number_format_map[NFtag.name] = NF;
-				NF = "";
-			} else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-				infmt = true;
-				NF = "";
-				NFtag = parsexmltag(Rn[0], false);
-			} break;
-
-		// LibreOffice bug https://bugs.documentfoundation.org/show_bug.cgi?id=149484
-		case 'boolean-style': // <number:boolean-style> 16.29.24
-			if(Rn[1]==='/') {
-				infmt = false;
-				number_format_map[NFtag.name] = "General";
-				NF = "";
-			} else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-				infmt = true;
-				NF = "";
-				NFtag = parsexmltag(Rn[0], false);
-			} break;
-
-		/* Number Format Elements */
-		case 'boolean': // <number:boolean> 16.29.25
-			NF += "General"; // ODF spec is unfortunately underspecified here
-			break;
-
-		case 'text': // <number:text> 16.29.27
-			if(Rn[1]==='/') {
-				payload = str.slice(tidx, xlmlregex.lastIndex - Rn[0].length);
-				// NOTE: Excel has a different interpretation of "%%" and friends
-				if(payload == "%" && NFtag[0] == '<number:percentage-style') NF += "%";
-				else NF += '"' + payload.replace(/"/g, '""') + '"';
-			} else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-				tidx = xlmlregex.lastIndex;
-			} break;
+var number_formats_ods = {
+	/* ods name: [short ssf fmt, long ssf fmt] */
+	day:           ["d",   "dd"],
+	month:         ["m",   "mm"],
+	year:          ["y",   "yy"],
+	hours:         ["h",   "hh"],
+	minutes:       ["m",   "mm"],
+	seconds:       ["s",   "ss"],
+	"am-pm":       ["A/P", "AM/PM"],
+	"day-of-week": ["ddd", "dddd"],
+	era:           ["e",   "ee"],
+	/* there is no native representation of LO "Q" format */
+	quarter:       ["\\Qm", "m\\\"th quarter\""]
+};


-		case 'day': { // <number:day> 16.29.12
-			y = parsexmltag(Rn[0], false);
-			switch(y["style"]) {
-				case "short": NF += "d"; break;
-				case "long": NF += "dd"; break;
-				default: NF += "dd"; break; // TODO: error condition
-			}
-		} break;
-
-		case 'day-of-week': { // <number:day-of-week> 16.29.16
-			y = parsexmltag(Rn[0], false);
-			switch(y["style"]) {
-				case "short": NF += "ddd"; break;
-				case "long": NF += "dddd"; break;
-				default: NF += "ddd"; break;
-			}
-		} break;
-
-		case 'era': { // <number:era> 16.29.15 TODO: proper mapping
-			y = parsexmltag(Rn[0], false);
-			switch(y["style"]) {
-				case "short": NF += "ee"; break;
-				case "long": NF += "eeee"; break;
-				default: NF += "eeee"; break; // TODO: error condition
-			}
-		} break;
-
-		case 'hours': { // <number:hours> 16.29.20
-			y = parsexmltag(Rn[0], false);
-			switch(y["style"]) {
-				case "short": NF += "h"; break;
-				case "long": NF += "hh"; break;
-				default: NF += "hh"; break; // TODO: error condition
-			}
-		} break;
-
-		case 'minutes': { // <number:minutes> 16.29.21
-			y = parsexmltag(Rn[0], false);
-			switch(y["style"]) {
-				case "short": NF += "m"; break;
-				case "long": NF += "mm"; break;
-				default: NF += "mm"; break; // TODO: error condition
-			}
-		} break;
-
-		case 'month': { // <number:month> 16.29.13
-			y = parsexmltag(Rn[0], false);
-			if(y["textual"]) NF += "mm";
-			switch(y["style"]) {
-				case "short": NF += "m"; break;
-				case "long": NF += "mm"; break;
-				default: NF += "m"; break;
-			}
-		} break;
-
-		case 'seconds': { // <number:seconds> 16.29.22
-			y = parsexmltag(Rn[0], false);
-			switch(y["style"]) {
-				case "short": NF += "s"; break;
-				case "long": NF += "ss"; break;
-				default: NF += "ss"; break; // TODO: error condition
-			}
-			if(y["decimal-places"]) NF += "." + fill("0", +y["decimal-places"]);
-		} break;
-
-		case 'year': { // <number:year> 16.29.14
-			y = parsexmltag(Rn[0], false);
-			switch(y["style"]) {
-				case "short": NF += "yy"; break;
-				case "long": NF += "yyyy"; break;
-				default: NF += "yy"; break; // TODO: error condition
-			}
-		} break;
-
-		case 'am-pm': // <number:am-pm> 16.29.23
-			NF += "AM/PM"; // LO autocorrects A/P -> AM/PM
-			break;
-
-		case 'week-of-year': // <number:week-of-year> 16.29.17
-		case 'quarter': // <number:quarter> 16.29.18
-			console.error("Excel does not support ODS format token " + Rn[3]);
-			break;
-
-		case 'fill-character': // <number:fill-character> 16.29.5
-			if(Rn[1]==='/') {
-				payload = str.slice(tidx, xlmlregex.lastIndex - Rn[0].length);
-				// NOTE: Excel has a different interpretation of "%%" and friends
-				NF += '"' + payload.replace(/"/g, '""') + '"*';
-			} else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-				tidx = xlmlregex.lastIndex;
-			} break;
-
-		case 'scientific-number': // <number:scientific-number> 16.29.6
-			// TODO: find a mapping for all parameters
-			y = parsexmltag(Rn[0], false);
-			NF += "0." + fill("0", +y["min-decimal-places"] || +y["decimal-places"] || 2) + fill("?", +y["decimal-places"] - +y["min-decimal-places"] || 0) + "E" + (parsexmlbool(y["forced-exponent-sign"]) ? "+" : "") + fill("0", +y["min-exponent-digits"] || 2);
-			break;
-
-		case 'fraction': // <number:fraction> 16.29.7
-			// TODO: find a mapping for all parameters
-			y = parsexmltag(Rn[0], false);
-			if(!+y["min-integer-digits"]) NF += "#";
-			else NF += fill("0", +y["min-integer-digits"]);
-			NF += " ";
-			NF += fill("?", +y["min-numerator-digits"] || 1);
-			NF += "/";
-			if(+y["denominator-value"]) NF += y["denominator-value"];
-			else NF += fill("?", +y["min-denominator-digits"] || 1);
-			break;
-
-		case 'currency-symbol': // <number:currency-symbol> 16.29.9
-			// TODO: localization with [$-...]
-			if(Rn[1]==='/') {
-				NF += '"' + str.slice(tidx, xlmlregex.lastIndex - Rn[0].length).replace(/"/g, '""') + '"';
-			} else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-				tidx = xlmlregex.lastIndex;
-			} else NF += "$";
-			break;
-
-		case 'text-properties': // <style:text-properties> 16.29.29
-			y = parsexmltag(Rn[0], false);
-			switch((y["color"]||"").toLowerCase().replace("#", "")) {
-				case "ff0000": case "red": NF = "[Red]" + NF; break;
-			}
-			break;
-
-		case 'text-content': // <number:text-content> 16.29.28
-			NF += "@";
-			break;
-
-		case 'map': // <style:map> 16.3
-			// TODO: handle more complex maps
-			y = parsexmltag(Rn[0], false);
-			if(unescapexml(y["condition"]) == "value()>=0") NF = number_format_map[y["apply-style-name"]] + ";" + NF;
-			else console.error("ODS number format may be incorrect: " + y["condition"]);
-			break;
-
-		case 'number': // <number:number> 16.29.3
-			// TODO: handle all the attributes
-			if(Rn[1]==='/') break;
-			y = parsexmltag(Rn[0], false);
-			tNF = "";
-			tNF += fill("0", +y["min-integer-digits"] || 1);
-			if(parsexmlbool(y["grouping"])) tNF = commaify(fill("#", Math.max(0, 4 - tNF.length)) + tNF);
-			if(+y["min-decimal-places"] || +y["decimal-places"]) tNF += ".";
-			if(+y["min-decimal-places"]) tNF += fill("0", +y["min-decimal-places"] || 1);
-			if(+y["decimal-places"] - (+y["min-decimal-places"]||0)) tNF += fill("0", +y["decimal-places"] - (+y["min-decimal-places"]||0)); // TODO: should this be "#" ?
-			NF += tNF;
-			break;
-
-		case 'embedded-text': // <number:embedded-text> 16.29.4
-			// TODO: verify interplay with grouping et al
-			if(Rn[1]==='/') {
-				if(etpos == 0) NF += '"' + str.slice(tidx, xlmlregex.lastIndex - Rn[0].length).replace(/"/g, '""') + '"';
-				else NF = NF.slice(0, etpos) + '"' + str.slice(tidx, xlmlregex.lastIndex - Rn[0].length).replace(/"/g, '""') + '"' + NF.slice(etpos);
-			} else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-				tidx = xlmlregex.lastIndex;
-				etpos = -+parsexmltag(Rn[0], false)["position"] || 0;
-			} break;
-
-	}}
-	return number_format_map;
-}
-
-function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
+function parse_content_xml(d/*:string*/, _opts)/*:Workbook*/ {
 		var opts = _opts || {};
 		if(DENSE != null && opts.dense == null) opts.dense = DENSE;
 		var str = xlml_normalize(d);
 		var state/*:Array<any>*/ = [], tmp;
 		var tag/*:: = {}*/;
-		var nfidx, NF = "", pidx = 0;
+		var NFtag = {name:""}, NF = "", pidx = 0;
 		var sheetag/*:: = {name:"", '名称':""}*/;
 		var rowtag/*:: = {'行号':""}*/;
 		var Sheets = {}, SheetNames/*:Array<string>*/ = [];
-		var ws = ({}/*:any*/); if(opts.dense) ws["!data"] = [];
+		var ws = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
 		var Rn, q/*:: :any = ({t:"", v:null, z:null, w:"",c:[],}:any)*/;
 		var ctag = ({value:""}/*:any*/);
-		var textp = "", textpidx = 0, textptag/*:: = {}*/, oldtextp = "", oldtextpidx = 0;
-		var textR = [], oldtextR = [];
+		var textp = "", textpidx = 0, textptag/*:: = {}*/;
+		var textR = [];
 		var R = -1, C = -1, range = {s: {r:1000000,c:10000000}, e: {r:0, c:0}};
 		var row_ol = 0;
-		var number_format_map = _nfm || {}, styles = {};
+		var number_format_map = {};
 		var merges/*:Array<Range>*/ = [], mrange = {}, mR = 0, mC = 0;
 		var rowinfo/*:Array<RowInfo>*/ = [], rowpeat = 1, colpeat = 1;
 		var arrayf/*:Array<[Range, string]>*/ = [];
-		var WB = {Names:[], WBProps:{}};
+		var WB = {Names:[]};
 		var atag = ({}/*:any*/);
 		var _Ref/*:[string, string]*/ = ["", ""];
 		var comments/*:Array<Comment>*/ = [], comment/*:Comment*/ = ({}/*:any*/);
@ -264,8 +57,8 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 		var isstub = false, intable = false;
 		var i = 0;
 		xlmlregex.lastIndex = 0;
-		str = remove_doctype(str_remove_ng(str, "<!--", "-->"));
-		while((Rn = xlmlregex.exec(str))) switch((Rn[3]=Rn[3].replace(/_[\s\S]*$/,""))) {
+		str = str.replace(/<!--([\s\S]*?)-->/mg,"").replace(/<!DOCTYPE[^\[]*\[[^\]]*\]>/gm,"");
+		while((Rn = xlmlregex.exec(str))) switch((Rn[3]=Rn[3].replace(/_.*$/,""))) {

 			case 'table': case '工作表': // 9.1.2 <table:table>
 				if(Rn[1]==='/') {
@ -288,7 +81,7 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					sheetag = parsexmltag(Rn[0], false);
 					R = C = -1;
 					range.s.r = range.s.c = 10000000; range.e.r = range.e.c = 0;
-					ws = ({}/*:any*/); if(opts.dense) ws["!data"] = []; merges = [];
+					ws = opts.dense ? ([]/*:any*/) : ({}/*:any*/); merges = [];
 					rowinfo = [];
 					intable = true;
 				}
@ -308,7 +101,7 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			case 'covered-table-cell': // 9.1.5 <table:covered-table-cell>
 				if(Rn[1] !== '/') ++C;
 				if(opts.sheetStubs) {
-					if(opts.dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = {t:'z'}; }
+					if(opts.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = {t:'z'}; }
 					else ws[encode_cell({r:R,c:C})] = {t:'z'};
 				}
 				textp = ""; textR = [];
@ -320,20 +113,19 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					colpeat = parseInt(ctag['number-columns-repeated']||"1", 10);
 					q = ({t:'z', v:null/*:: , z:null, w:"",c:[]*/}/*:any*/);
 					if(ctag.formula && opts.cellFormula != false) q.f = ods_to_csf_formula(unescapexml(ctag.formula));
-					if(ctag["style-name"] && styles[ctag["style-name"]]) q.z = styles[ctag["style-name"]];
 					if((ctag['数据类型'] || ctag['value-type']) == "string") {
 						q.t = "s"; q.v = unescapexml(ctag['string-value'] || "");
 						if(opts.dense) {
-							if(!ws["!data"][R]) ws["!data"][R] = [];
-							ws["!data"][R][C] = q;
+							if(!ws[R]) ws[R] = [];
+							ws[R][C] = q;
 						} else {
-							ws[encode_col(C) + encode_row(R)] = q;
+							ws[encode_cell({r:R,c:C})] = q;
 						}
 					}
 					C+= colpeat-1;
 				} else if(Rn[1]!=='/') {
 					++C;
-					textp = oldtextp = ""; textpidx = oldtextpidx = 0; textR = []; oldtextR = [];
+					textp = ""; textpidx = 0; textR = [];
 					colpeat = 1;
 					var rptR = rowpeat ? R + rowpeat - 1 : R;
 					if(C > range.e.c) range.e.c = C;
@ -343,7 +135,6 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					ctag = parsexmltag(Rn[0], false);
 					comments = []; comment = ({}/*:any*/);
 					q = ({t:ctag['数据类型'] || ctag['value-type'], v:null/*:: , z:null, w:"",c:[]*/}/*:any*/);
-					if(ctag["style-name"] && styles[ctag["style-name"]]) q.z = styles[ctag["style-name"]];
 					if(opts.cellFormula) {
 						if(ctag.formula) ctag.formula = unescapexml(ctag.formula);
 						if(ctag['number-matrix-columns-spanned'] && ctag['number-matrix-rows-spanned']) {
@ -369,23 +160,19 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					/* 19.675.2 table:number-columns-repeated */
 					if(ctag['number-columns-repeated']) colpeat = parseInt(ctag['number-columns-repeated'], 10);

-					/* 19.385 office:value-type TODO: verify ODS and UOS */
+					/* 19.385 office:value-type */
 					switch(q.t) {
-						case 'boolean': q.t = 'b'; q.v = parsexmlbool(ctag['boolean-value']) || (+ctag['boolean-value'] >= 1); break;
-						case 'float': q.t = 'n'; q.v = parseFloat(ctag.value);
-							if(opts.cellDates && q.z && fmt_is_date(q.z)) { q.v = numdate(q.v + (WB.WBProps.date1904 ? 1462 : 0)); q.t = typeof q.v == "number" ? 'n' : 'd'; }
-							break;
+						case 'boolean': q.t = 'b'; q.v = parsexmlbool(ctag['boolean-value']); break;
+						case 'float': q.t = 'n'; q.v = parseFloat(ctag.value); break;
 						case 'percentage': q.t = 'n'; q.v = parseFloat(ctag.value); break;
 						case 'currency': q.t = 'n'; q.v = parseFloat(ctag.value); break;
-						case 'date': q.t = 'd'; q.v = parseDate(ctag['date-value'], WB.WBProps.date1904);
-							if(!opts.cellDates) { q.t = 'n'; q.v = datenum(q.v, WB.WBProps.date1904); }
-							if(!q.z) q.z = 'm/d/yy'; break;
-						/* NOTE: for `time`, Excel ODS export incorrectly uses durations relative to 1900 epoch even if 1904 is specified */
+						case 'date': q.t = 'd'; q.v = parseDate(ctag['date-value']);
+							if(!opts.cellDates) { q.t = 'n'; q.v = datenum(q.v); }
+							q.z = 'm/d/yy'; break;
 						case 'time': q.t = 'n'; q.v = parse_isodur(ctag['time-value'])/86400;
-							if(opts.cellDates) { q.v = numdate(q.v); q.t = typeof q.v == "number" ? 'n' : 'd'; }
-							if(!q.z) q.z = 'HH:MM:SS'; break;
-						case 'number': q.t = 'n'; q.v = parseFloat(ctag['数据数值']);
-							break;
+							if(opts.cellDates) { q.t = 'd'; q.v = numdate(q.v); }
+							q.z = 'HH:MM:SS'; break;
+						case 'number': q.t = 'n'; q.v = parseFloat(ctag['数据数值']); break;
 						default:
 							if(q.t === 'string' || q.t === 'text' || !q.t) {
 								q.t = 's';
@ -408,9 +195,9 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 							for(var rpt = 0; rpt < rowpeat; ++rpt) {
 								colpeat = parseInt(ctag['number-columns-repeated']||"1", 10);
 								if(opts.dense) {
-									if(!ws["!data"][R + rpt]) ws["!data"][R + rpt] = [];
-									ws["!data"][R + rpt][C] = rpt == 0 ? q : dup(q);
-									while(--colpeat > 0) ws["!data"][R + rpt][C + colpeat] = dup(q);
+									if(!ws[R + rpt]) ws[R + rpt] = [];
+									ws[R + rpt][C] = rpt == 0 ? q : dup(q);
+									while(--colpeat > 0) ws[R + rpt][C + colpeat] = dup(q);
 								} else {
 									ws[encode_cell({r:R + rpt,c:C})] = q;
 									while(--colpeat > 0) ws[encode_cell({r:R + rpt,c:C + colpeat})] = dup(q);
@ -446,17 +233,10 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					if(textR.length) /*::(*/comment/*:: :any)*/.R = textR;
 					comment.a = creator;
 					comments.push(comment);
-					textp = oldtextp; textpidx = oldtextpidx; textR = oldtextR;
-				}
-				else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-					state.push([Rn[3], false]);
-					var annotag = parsexmltag(Rn[0], true);
-					/* office:display TODO: check if there is a global override */
-					if(!(annotag["display"] && parsexmlbool(annotag["display"]))) comments.hidden = true;
-					oldtextp = textp; oldtextpidx = textpidx; oldtextR = textR;
-					textp = ""; textpidx = 0; textR = [];
 				}
+				else if(Rn[0].charAt(Rn[0].length-2) !== '/') {state.push([Rn[3], false]);}
 				creator = ""; creatoridx = 0;
+				textp = ""; textpidx = 0; textR = [];
 				break;

 			case 'creator': // 4.3.2.7 <dc:creator>
@ -486,24 +266,23 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 				textp = ""; textpidx = 0; textR = [];
 				break;

-			case 'scientific-number': // <number:scientific-number>
-			case 'currency-symbol': // <number:currency-symbol>
-			case 'fill-character': // 16.29.5 <number:fill-character>
+			case 'scientific-number': // TODO: <number:scientific-number>
+				break;
+			case 'currency-symbol': // TODO: <number:currency-symbol>
+				break;
+			case 'currency-style': // TODO: <number:currency-style>
 				break;
-
-			case 'text-style': // 16.27.25 <number:text-style>
-			case 'boolean-style': // 16.27.23 <number:boolean-style>
 			case 'number-style': // 16.27.2 <number:number-style>
-			case 'currency-style': // 16.29.8 <number:currency-style>
 			case 'percentage-style': // 16.27.9 <number:percentage-style>
 			case 'date-style': // 16.27.10 <number:date-style>
 			case 'time-style': // 16.27.18 <number:time-style>
 				if(Rn[1]==='/'){
-					var xlmlidx = xlmlregex.lastIndex;
-					parse_ods_styles(str.slice(nfidx, xlmlregex.lastIndex), _opts, number_format_map);
-					xlmlregex.lastIndex = xlmlidx;
+					number_format_map[NFtag.name] = NF;
+					if((tmp=state.pop())[0]!==Rn[3]) throw "Bad state: "+tmp;
 				} else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
-					nfidx = xlmlregex.lastIndex - Rn[0].length;
+					NF = "";
+					NFtag = parsexmltag(Rn[0], false);
+					state.push([Rn[3], true]);
 				} break;

 			case 'script': break; // 3.13 <office:script>
@ -512,10 +291,8 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {

 			case 'default-style': // TODO: <style:default-style>
 			case 'page-layout': break; // TODO: <style:page-layout>
-			case 'style': { // 16.2 <style:style>
-				var styletag = parsexmltag(Rn[0], false);
-				if(styletag["family"] == "table-cell" && number_format_map[styletag["data-style-name"]]) styles[styletag["name"]] = number_format_map[styletag["data-style-name"]];
-			} break;
+			case 'style': // 16.2 <style:style>
+				break;
 			case 'map': break; // 16.3 <style:map>
 			case 'font-face': break; // 16.21 <style:font-face>

@ -526,7 +303,12 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			case 'table-cell-properties': break; // 17.18 <style:table-cell-properties>

 			case 'number': // 16.27.3 <number:number>
-				break;
+				switch(state[state.length-1][0]) {
+					case 'time-style':
+					case 'date-style':
+						tag = parsexmltag(Rn[0], false);
+						NF += number_formats_ods[Rn[3]][tag.style==='long'?1:0]; break;
+				} break;

 			case 'fraction': break; // TODO 16.27.6 <number:fraction>

@ -541,9 +323,16 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			case 'minutes': // 16.27.20 <number:minutes>
 			case 'seconds': // 16.27.21 <number:seconds>
 			case 'am-pm': // 16.27.22 <number:am-pm>
-				break;
+				switch(state[state.length-1][0]) {
+					case 'time-style':
+					case 'date-style':
+						tag = parsexmltag(Rn[0], false);
+						NF += number_formats_ods[Rn[3]][tag.style==='long'?1:0]; break;
+				} break;

+			case 'boolean-style': break; // 16.27.23 <number:boolean-style>
 			case 'boolean': break; // 16.27.24 <number:boolean>
+			case 'text-style': break; // 16.27.25 <number:text-style>
 			case 'text': // 16.27.26 <number:text>
 				if(Rn[0].slice(-2) === "/>") break;
 				else if(Rn[1]==="/") switch(state[state.length-1][0]) {
@ -579,12 +368,7 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			case 'table-header-columns': break; // 9.1.11 <table:table-header-columns>
 			case 'table-columns': break; // 9.1.12 <table:table-columns>

-			case 'null-date': // 9.4.2 <table:null-date>
-				tag = parsexmltag(Rn[0], false);
-				switch(tag["date-value"]) {
-					case "1904-01-01": WB.WBProps.date1904 = true; break;
-				}
-				break;
+			case 'null-date': break; // 9.4.2 <table:null-date> TODO: date1904

 			case 'graphic-properties': break; // 17.21 <style:graphic-properties>
 			case 'calculation-settings': break; // 9.4.1 <table:calculation-settings>
@ -604,9 +388,6 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 				if(Rn[1]==='/' && (!ctag || !ctag['string-value'])) {
 					var ptp = parse_text_p(str.slice(textpidx,Rn.index), textptag);
 					textp = (textp.length > 0 ? textp + "\n" : "") + ptp[0];
-				} else if(Rn[0].slice(-2) == "/>") {
-					/* TODO: is self-closing 文本串 valid? */
-					textp += "\n";
 				} else { textptag = parsexmltag(Rn[0], false); textpidx = Rn.index + Rn[0].length; }
 				break; // <text:p>
 			case 's': break; // <text:s>
@ -636,13 +417,10 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			case 'help-message': break; // 9.4.6 <table:
 			case 'error-message': break; // 9.4.7 <table:
 			case 'database-ranges': break; // 9.4.14 <table:database-ranges>
-
-			/* 9.5 Filters */
 			case 'filter': break; // 9.5.2 <table:filter>
 			case 'filter-and': break; // 9.5.3 <table:filter-and>
 			case 'filter-or': break; // 9.5.4 <table:filter-or>
 			case 'filter-condition': break; // 9.5.5 <table:filter-condition>
-			case 'filter-set-item': break; // 9.5.6 <table:filter-condition>

 			case 'list-level-style-bullet': break; // 16.31 <text:
 			case 'list-level-style-number': break; // 16.32 <text:
@ -778,18 +556,13 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 function parse_ods(zip/*:ZIPFile*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 	opts = opts || ({}/*:any*/);
 	if(safegetzipfile(zip, 'META-INF/manifest.xml')) parse_manifest(getzipdata(zip, 'META-INF/manifest.xml'), opts);
-	var styles = getzipstr(zip, 'styles.xml');
-	var Styles = styles && parse_ods_styles(utf8read(styles), opts);
 	var content = getzipstr(zip, 'content.xml');
 	if(!content) throw new Error("Missing content.xml in ODS / UOF file");
-	var wb = parse_content_xml(utf8read(content), opts, Styles);
+	var wb = parse_content_xml(utf8read(content), opts);
 	if(safegetzipfile(zip, 'meta.xml')) wb.Props = parse_core_props(getzipdata(zip, 'meta.xml'));
-	wb.bookType = "ods";
 	return wb;
 }
 function parse_fods(data/*:string*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
-	var wb = parse_content_xml(data, opts);
-	wb.bookType = "fods";
-	return wb;
+	return parse_content_xml(data, opts);
 }

--- a/bits/81_writeods.js
+++ b/bits/81_writeods.js
@ -30,194 +30,25 @@ var write_styles_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function(
 		return XML_HEADER + payload;
 	};
 })();
-
-// TODO: find out if anyone actually read the spec.  LO has some wild errors
-function write_number_format_ods(nf/*:string*/, nfidx/*:string*/)/*:string*/ {
-	var type = "number", payload = "", nopts = { "style:name": nfidx }, c = "", i = 0;
-	nf = nf.replace(/"[$]"/g, "$");
-	/* TODO: replace with an actual parser based on a real grammar */
-	j: {
-		// TODO: support style maps
-		if(nf.indexOf(";") > -1) {
-			console.error("Unsupported ODS Style Map exported.  Using first branch of " + nf);
-			nf = nf.slice(0, nf.indexOf(";"));
-		}
-
-		if(nf == "@") { type = "text"; payload = "<number:text-content/>"; break j; }
-
-		/* currency flag */
-		if(nf.indexOf(/\$/) > -1) { type = "currency"; }
-
-		/* opening string literal */
-		if(nf[i] == '"') {
-			c = "";
-			while(nf[++i] != '"' || nf[++i] == '"') c += nf[i]; --i;
-			if(nf[i+1] == "*") {
-				i++;
-				payload += '<number:fill-character>' + escapexml(c.replace(/""/g, '"')) + '</number:fill-character>';
-			} else {
-				payload += '<number:text>' + escapexml(c.replace(/""/g, '"')) + '</number:text>';
-			}
-			nf = nf.slice(i+1); i = 0;
-		}
-
-		/* fractions */
-		var t = nf.match(/# (\?+)\/(\?+)/);
-		if(t) { payload += writextag("number:fraction", null, {"number:min-integer-digits":0, "number:min-numerator-digits": t[1].length, "number:max-denominator-value": Math.max(+(t[1].replace(/./g, "9")), +(t[2].replace(/./g, "9"))) }); break j; }
-		if((t=nf.match(/# (\?+)\/(\d+)/))) { payload += writextag("number:fraction", null, {"number:min-integer-digits":0, "number:min-numerator-digits": t[1].length, "number:denominator-value": +t[2]}); break j; }
-
-		/* percentages */
-		if((t=nf.match(/\b(\d+)(|\.\d+)%/))) { type = "percentage"; payload += writextag("number:number", null, {"number:decimal-places": t[2] && t.length - 1 || 0, "number:min-decimal-places": t[2] && t.length - 1 || 0, "number:min-integer-digits": t[1].length }) + "<number:text>%</number:text>"; break j; }
-
-		/* datetime */
-		var has_time = false;
-		if(["y","m","d"].indexOf(nf[0]) > -1) {
-			type = "date";
-			k: for(; i < nf.length; ++i) switch((c = nf[i].toLowerCase())) {
-				case "h": case "s": has_time = true; --i; break k;
-				case "m":
-					l: for(var h = i+1; h < nf.length; ++h) switch(nf[h]) {
-						case "y": case "d": break l;
-						case "h": case "s": has_time = true; --i; break k;
-					}
-					/* falls through */
-				case "y": case "d":
-					while((nf[++i]||"").toLowerCase() == c[0]) c += c[0]; --i;
-					switch(c) {
-						case "y": case "yy": payload += "<number:year/>"; break;
-						case "yyy": case "yyyy": payload += '<number:year number:style="long"/>'; break;
-						case "mmmmm": console.error("ODS has no equivalent of format |mmmmm|");
-							/* falls through */
-						case "m": case "mm": case "mmm": case "mmmm":
-							payload += '<number:month number:style="' + (c.length % 2 ? "short" : "long") + '" number:textual="' + (c.length >= 3 ? "true" : "false") + '"/>';
-							break;
-						case "d": case "dd": payload += '<number:day number:style="' + (c.length % 2 ? "short" : "long") + '"/>'; break;
-						case "ddd": case "dddd": payload += '<number:day-of-week number:style="' + (c.length % 2 ? "short" : "long") + '"/>'; break;
-					}
-					break;
-				case '"':
-					while(nf[++i] != '"' || nf[++i] == '"') c += nf[i]; --i;
-					payload += '<number:text>' + escapexml(c.slice(1).replace(/""/g, '"')) + '</number:text>';
-					break;
-				case '\\': c = nf[++i];
-					payload += '<number:text>' + escapexml(c) + '</number:text>'; break;
-				case '/': case ':': payload += '<number:text>' + escapexml(c) + '</number:text>'; break;
-				default: console.error("unrecognized character " + c + " in ODF format " + nf);
-			}
-			if(!has_time) break j;
-			nf = nf.slice(i+1); i = 0;
-		}
-		if(nf.match(/^\[?[hms]/)) {
-			if(type == "number") type = "time";
-			if(nf.match(/\[/)) {
-				nf = nf.replace(/[\[\]]/g, "");
-				nopts['number:truncate-on-overflow'] = "false";
-			}
-			for(; i < nf.length; ++i) switch((c = nf[i].toLowerCase())) {
-				case "h": case "m": case "s":
-					while((nf[++i]||"").toLowerCase() == c[0]) c += c[0]; --i;
-					switch(c) {
-						case "h": case "hh": payload += '<number:hours number:style="' + (c.length % 2 ? "short" : "long") + '"/>'; break;
-						case "m": case "mm": payload += '<number:minutes number:style="' + (c.length % 2 ? "short" : "long") + '"/>'; break;
-						case "s": case "ss":
-							if(nf[i+1] == ".") do { c += nf[i+1]; ++i; } while(nf[i+1] == "0");
-							payload += '<number:seconds number:style="' + (c.match("ss") ? "long" : "short") + '"' + (c.match(/\./) ? ' number:decimal-places="' + (c.match(/0+/)||[""])[0].length + '"' : "")+ '/>'; break;
-					}
-					break;
-				case '"':
-					while(nf[++i] != '"' || nf[++i] == '"') c += nf[i]; --i;
-					payload += '<number:text>' + escapexml(c.slice(1).replace(/""/g, '"')) + '</number:text>';
-					break;
-				case '/': case ':': payload += '<number:text>' + escapexml(c) + '</number:text>'; break;
-				case "a":
-					if(nf.slice(i, i+3).toLowerCase() == "a/p") { payload += '<number:am-pm/>'; i += 2; break; } // Note: ODF does not support A/P
-					if(nf.slice(i, i+5).toLowerCase() == "am/pm")  { payload += '<number:am-pm/>'; i += 4; break; }
-					/* falls through */
-				default: console.error("unrecognized character " + c + " in ODF format " + nf);
-			}
-			break j;
-		}
-
-		/* currency flag */
-		if(nf.indexOf(/\$/) > -1) { type = "currency"; }
-
-		/* should be in a char loop */
-		if(nf[0] == "$") { payload += '<number:currency-symbol number:language="en" number:country="US">$</number:currency-symbol>'; nf = nf.slice(1); i = 0; }
-		i = 0; if(nf[i] == '"') {
-			while(nf[++i] != '"' || nf[++i] == '"') c += nf[i]; --i;
-			if(nf[i+1] == "*") {
-				i++;
-				payload += '<number:fill-character>' + escapexml(c.replace(/""/g, '"')) + '</number:fill-character>';
-			} else {
-				payload += '<number:text>' + escapexml(c.replace(/""/g, '"')) + '</number:text>';
-			}
-			nf = nf.slice(i+1); i = 0;
-		}
-
-		/* number TODO: interstitial text e.g. 000)000-0000 */
-		var np = nf.match(/([#0][0#,]*)(\.[0#]*|)(E[+]?0*|)/i);
-		if(!np || !np[0]) console.error("Could not find numeric part of " + nf);
-		else {
-			var base = np[1].replace(/,/g, "");
-			payload += '<number:' + (np[3] ? "scientific-" : "")+ 'number' +
-				' number:min-integer-digits="' + (base.indexOf("0") == -1 ? "0" : base.length - base.indexOf("0")) + '"' +
-				(np[0].indexOf(",") > -1 ? ' number:grouping="true"' : "") +
-				(np[2] && ' number:decimal-places="' + (np[2].length - 1) + '"' || ' number:decimal-places="0"') +
-				(np[3] && np[3].indexOf("+") > -1 ? ' number:forced-exponent-sign="true"' : "" ) +
-				(np[3] ? ' number:min-exponent-digits="' + np[3].match(/0+/)[0].length + '"' : "" ) +
-				'>' +
-				/* TODO: interstitial text placeholders */
-				'</number:' + (np[3] ? "scientific-" : "") + 'number>';
-			i = np.index + np[0].length;
-		}
-
-		/* residual text */
-		if(nf[i] == '"') {
-			c = "";
-			while(nf[++i] != '"' || nf[++i] == '"') c += nf[i]; --i;
-			payload += '<number:text>' + escapexml(c.replace(/""/g, '"')) + '</number:text>';
-		}
-	}
-
-	if(!payload) { console.error("Could not generate ODS number format for |" + nf + "|"); return ""; }
-	return writextag("number:" + type + "-style", payload, nopts);
-}
-
-function write_names_ods(Names, SheetNames, idx) {
-	//var scoped = Names.filter(function(name) { return name.Sheet == (idx == -1 ? null : idx); });
-	var scoped = []; for(var namei = 0; namei < Names.length; ++namei) {
-		var name = Names[namei];
-		if(!name) continue;
-		if(name.Sheet == (idx == -1 ? null : idx)) scoped.push(name);
-	}
-	if(!scoped.length) return "";
-	return "      <table:named-expressions>\n" + scoped.map(function(name) {
-		var odsref =  (idx == -1 ? "$" : "") + csf_to_ods_3D(name.Ref);
-		return "        " + writextag("table:named-range", null, {
-			"table:name": name.Name,
-			"table:cell-range-address": odsref,
-			"table:base-cell-address": odsref.replace(/[\.][^\.]*$/, ".$A$1")
-		});
-	}).join("\n") + "\n      </table:named-expressions>\n";
-}
 var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function() {
 	/* 6.1.2 White Space Characters */
-	var write_text_p = function(text/*:string*/, span)/*:string*/ {
+	var write_text_p = function(text/*:string*/)/*:string*/ {
 		return escapexml(text)
 			.replace(/  +/g, function($$){return '<text:s text:c="'+$$.length+'"/>';})
 			.replace(/\t/g, "<text:tab/>")
-			.replace(/\n/g, span ? "<text:line-break/>": "</text:p><text:p>")
+			.replace(/\n/g, "</text:p><text:p>")
 			.replace(/^ /, "<text:s/>").replace(/ $/, "<text:s/>");
 	};

 	var null_cell_xml = '          <table:table-cell />\n';
-	var write_ws = function(ws, wb/*:Workbook*/, i/*:number*/, opts, nfs, date1904)/*:string*/ {
+	var covered_cell_xml = '          <table:covered-table-cell/>\n';
+	var write_ws = function(ws, wb/*:Workbook*/, i/*:number*//*::, opts*/)/*:string*/ {
 		/* Section 9 Tables */
 		var o/*:Array<string>*/ = [];
 		o.push('      <table:table table:name="' + escapexml(wb.SheetNames[i]) + '" table:style-name="ta1">\n');
 		var R=0,C=0, range = decode_range(ws['!ref']||"A1");
 		var marr/*:Array<Range>*/ = ws['!merges'] || [], mi = 0;
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		if(ws["!cols"]) {
 			for(C = 0; C <= range.e.c; ++C) o.push('        <table:table-column' + (ws["!cols"][C] ? ' table:style-name="co' + ws["!cols"][C].ods + '"' : '') + '></table:table-column>\n');
 		}
@ -242,8 +73,8 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 					ct['table:number-rows-spanned'] =    (marr[mi].e.r - marr[mi].s.r + 1);
 					break;
 				}
-				if(skip) { o.push('          <table:covered-table-cell/>\n'); continue; }
-				var ref = encode_cell({r:R, c:C}), cell = dense ? (ws["!data"][R]||[])[C]: ws[ref];
+				if(skip) { o.push(covered_cell_xml); continue; }
+				var ref = encode_cell({r:R, c:C}), cell = dense ? (ws[R]||[])[C]: ws[ref];
 				if(cell && cell.f) {
 					ct['table:formula'] = escapexml(csf_to_ods_formula(cell.f));
 					if(cell.F) {
@ -271,13 +102,13 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 						ct['office:value-type'] = "string";
 						break;
 					case 'd':
-						textp = (cell.w||(parseDate(cell.v, date1904).toISOString()));
+						textp = (cell.w||(parseDate(cell.v).toISOString()));
 						ct['office:value-type'] = "date";
-						ct['office:date-value'] = (parseDate(cell.v, date1904).toISOString());
+						ct['office:date-value'] = (parseDate(cell.v).toISOString());
 						ct['table:style-name'] = "ce1";
 						break;
-					//case 'e': // TODO: translate to ODS errors
-					default: o.push(null_cell_xml); continue; // TODO: empty cell with comments
+					//case 'e':
+					default: o.push(null_cell_xml); continue;
 				}
 				var text_p = write_text_p(textp);
 				if(cell.l && cell.l.Target) {
@ -287,22 +118,10 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 					if(_tgt.charAt(0) != "#" && !_tgt.match(/^\w+:/)) _tgt = '../' + _tgt;
 					text_p = writextag('text:a', text_p, {'xlink:href': _tgt.replace(/&/g, "&amp;")});
 				}
-				if(nfs[cell.z]) ct["table:style-name"] = "ce" + nfs[cell.z].slice(1);
-				var payload = writextag('text:p', text_p, {});
-				if(cell.c) {
-					var acreator = "", apayload = "", aprops = {};
-					for(var ci = 0; ci < cell.c.length; ++ci) {
-						if(!acreator && cell.c[ci].a) acreator = cell.c[ci].a;
-						apayload += "<text:p>" + write_text_p(cell.c[ci].t) + "</text:p>";
-					}
-					if(!cell.c.hidden) aprops["office:display"] = true;
-					payload = writextag('office:annotation', apayload, aprops) + payload;
-				}
-				o.push('          ' + writextag('table:table-cell', payload, ct) + '\n');
+				o.push('          ' + writextag('table:table-cell', writextag('text:p', text_p, {}), ct) + '\n');
 			}
 			o.push('        </table:table-row>\n');
 		}
-		if((wb.Workbook||{}).Names) o.push(write_names_ods(wb.Workbook.Names, wb.SheetNames, i));
 		o.push('      </table:table>\n');
 		return o.join("");
 	};
@ -310,6 +129,14 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 	var write_automatic_styles_ods = function(o/*:Array<string>*/, wb) {
 		o.push(' <office:automatic-styles>\n');

+		o.push('  <number:date-style style:name="N37" number:automatic-order="true">\n');
+		o.push('   <number:month number:style="long"/>\n');
+		o.push('   <number:text>/</number:text>\n');
+		o.push('   <number:day number:style="long"/>\n');
+		o.push('   <number:text>/</number:text>\n');
+		o.push('   <number:year/>\n');
+		o.push('  </number:date-style>\n');
+
 		/* column styles */
 		var cidx = 0;
 		wb.SheetNames.map(function(n) { return wb.Sheets[n]; }).forEach(function(ws) {
@ -350,40 +177,12 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 		o.push('   <style:table-properties table:display="true" style:writing-mode="lr-tb"/>\n');
 		o.push('  </style:style>\n');

-		o.push('  <number:date-style style:name="N37" number:automatic-order="true">\n');
-		o.push('   <number:month number:style="long"/>\n');
-		o.push('   <number:text>/</number:text>\n');
-		o.push('   <number:day number:style="long"/>\n');
-		o.push('   <number:text>/</number:text>\n');
-		o.push('   <number:year/>\n');
-		o.push('  </number:date-style>\n');
-
-		/* number formats, table cells, text */
-		var nfs = {};
-		var nfi = 69;
-		wb.SheetNames.map(function(n) { return wb.Sheets[n]; }).forEach(function(ws) {
-			if(!ws) return;
-			var dense = (ws["!data"] != null);
-			if(!ws["!ref"]) return;
-			var range = decode_range(ws["!ref"]);
-			for(var R = 0; R <= range.e.r; ++R) for(var C = 0; C <= range.e.c; ++C) {
-				var c = dense ? (ws["!data"][R]||[])[C] : ws[encode_cell({r:R,c:C})];
-				if(!c || !c.z || c.z.toLowerCase() == "general") continue;
-				if(!nfs[c.z]) {
-					var out = write_number_format_ods(c.z, "N" + nfi);
-					if(out) { nfs[c.z] = "N" + nfi; ++nfi; o.push(out + "\n"); }
-				}
-			}
-		});
+		/* table cells, text */
 		o.push('  <style:style style:name="ce1" style:family="table-cell" style:parent-style-name="Default" style:data-style-name="N37"/>\n');
-		keys(nfs).forEach(function(nf) {
-			o.push('<style:style style:name="ce' + nfs[nf].slice(1) + '" style:family="table-cell" style:parent-style-name="Default" style:data-style-name="' + nfs[nf] + '"/>\n');
-		});

 		/* page-layout */

 		o.push(' </office:automatic-styles>\n');
-		return nfs;
 	};

 	return function wcx(wb, opts) {
@ -436,16 +235,14 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function

 		if(opts.bookType == "fods") {
 			o.push('<office:document' + attr + fods + '>\n');
-			o.push(write_meta_ods().replace(/<office:document-meta[^<>]*?>/, "").replace(/<\/office:document-meta>/, "") + "\n");
+			o.push(write_meta_ods().replace(/office:document-meta/g, "office:meta"));
 			// TODO: settings (equiv of settings.xml for ODS)
 		} else o.push('<office:document-content' + attr  + '>\n');
 		// o.push('  <office:scripts/>\n');
-		var nfs = write_automatic_styles_ods(o, wb);
+		write_automatic_styles_ods(o, wb);
 		o.push('  <office:body>\n');
 		o.push('    <office:spreadsheet>\n');
-		if(((wb.Workbook||{}).WBProps||{}).date1904) o.push('      <table:calculation-settings table:case-sensitive="false" table:search-criteria-must-apply-to-whole-cell="true" table:use-wildcards="true" table:use-regular-expressions="false" table:automatic-find-labels="false">\n        <table:null-date table:date-value="1904-01-01"/>\n      </table:calculation-settings>\n');
-		for(var i = 0; i != wb.SheetNames.length; ++i) o.push(write_ws(wb.Sheets[wb.SheetNames[i]], wb, i, opts, nfs, ((wb.Workbook||{}).WBProps||{}).date1904));
-		if((wb.Workbook||{}).Names) o.push(write_names_ods(wb.Workbook.Names, wb.SheetNames, -1));
+		for(var i = 0; i != wb.SheetNames.length; ++i) o.push(write_ws(wb.Sheets[wb.SheetNames[i]], wb, i, opts));
 		o.push('    </office:spreadsheet>\n');
 		o.push('  </office:body>\n');
 		if(opts.bookType == "fods") o.push('</office:document>');
--- a/bits/83_numbers.js
+++ b/bits/83_numbers.js
--- a/bits/85_parsezip.js
+++ b/bits/85_parsezip.js
@ -13,13 +13,6 @@ function safe_parse_wbrels(wbrels, sheets) {
 	return !wbrels || wbrels.length === 0 ? null : wbrels;
 }

-function parse_sheet_legacy_drawing(sheet, type, zip, path, idx, opts, wb, comments) {
-	if(!sheet || !sheet['!legdrawel']) return;
-	var dfile = resolve_path(sheet['!legdrawel'].Target, path);
-	var draw = getzipstr(zip, dfile, true);
-	if(draw) parse_vml(utf8read(draw), sheet, comments||[]);
-}
-
 function safe_parse_sheet(zip, path/*:string*/, relsPath/*:string*/, sheet, idx/*:number*/, sheetRels, sheets, stype/*:string*/, opts, wb, themes, styles) {
 	try {
 		sheetRels[sheet]=parse_rels(getzipstr(zip, relsPath, true), path);
@ -43,12 +36,12 @@ function safe_parse_sheet(zip, path/*:string*/, relsPath/*:string*/, sheet, idx/
 		sheets[sheet] = _ws;

 		/* scan rels for comments and threaded comments */
-		var comments = [], tcomments = [];
+		var tcomments = [];
 		if(sheetRels && sheetRels[sheet]) keys(sheetRels[sheet]).forEach(function(n) {
 			var dfile = "";
 			if(sheetRels[sheet][n].Type == RELS.CMNT) {
 				dfile = resolve_path(sheetRels[sheet][n].Target, path);
-				comments = parse_cmnt(getzipdata(zip, dfile, true), dfile, opts);
+				var comments = parse_cmnt(getzipdata(zip, dfile, true), dfile, opts);
 				if(!comments || !comments.length) return;
 				sheet_insert_comments(_ws, comments, false);
 			}
@ -58,7 +51,6 @@ function safe_parse_sheet(zip, path/*:string*/, relsPath/*:string*/, sheet, idx/
 			}
 		});
 		if(tcomments && tcomments.length) sheet_insert_comments(_ws, tcomments, true, opts.people || []);
-		parse_sheet_legacy_drawing(_ws, stype, zip, path, idx, opts, wb, comments);
 	} catch(e) { if(opts.WTF) throw e; }
 }

@ -77,25 +69,16 @@ function parse_zip(zip/*:ZIP*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 	if(safegetzipfile(zip, 'Index/Document.iwa')) {
 		if(typeof Uint8Array == "undefined") throw new Error('NUMBERS file parsing requires Uint8Array support');
 		if(typeof parse_numbers_iwa != "undefined") {
-			if(zip.FileIndex) return parse_numbers_iwa(zip, opts);
+			if(zip.FileIndex) return parse_numbers_iwa(zip);
 			var _zip = CFB.utils.cfb_new();
 			zipentries(zip).forEach(function(e) { zip_add_file(_zip, e, getzipbin(zip, e)); });
-			return parse_numbers_iwa(_zip, opts);
+			return parse_numbers_iwa(_zip);
 		}
 		throw new Error('Unsupported NUMBERS file');
 	}
 	if(!safegetzipfile(zip, '[Content_Types].xml')) {
 		if(safegetzipfile(zip, 'index.xml.gz')) throw new Error('Unsupported NUMBERS 08 file');
 		if(safegetzipfile(zip, 'index.xml')) throw new Error('Unsupported NUMBERS 09 file');
-		var index_zip = CFB.find(zip, 'Index.zip');
-		if(index_zip) {
-			opts = dup(opts);
-			delete opts.type;
-			if(typeof index_zip.content == "string") opts.type = "binary";
-			// TODO: Bun buffer bug
-			if(typeof Bun !== "undefined" && Buffer.isBuffer(index_zip.content)) return readSync(new Uint8Array(index_zip.content), opts);
-			return readSync(index_zip.content, opts);
-		}
 		throw new Error('Unsupported ZIP file');
 	}

@ -121,7 +104,7 @@ function parse_zip(zip/*:ZIP*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 		strs = [];
 		if(dir.sst) try { strs=parse_sst(getzipdata(zip, strip_front_slash(dir.sst)), dir.sst, opts); } catch(e) { if(opts.WTF) throw e; }

-		if(opts.cellStyles && dir.themes.length) themes = parse_theme_xml(getzipstr(zip, dir.themes[0].replace(/^\//,''), true)||"", opts);
+		if(opts.cellStyles && dir.themes.length) themes = parse_theme(getzipstr(zip, dir.themes[0].replace(/^\//,''), true)||"",dir.themes[0], opts);

 		if(dir.style) styles = parse_sty(getzipdata(zip, strip_front_slash(dir.style)), dir.style, themes, opts);
 	}
@ -204,7 +187,7 @@ function parse_zip(zip/*:ZIP*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 		if(wbrels && wbrels[i]) {
 			path = 'xl/' + (wbrels[i][1]).replace(/[\/]?xl\//, "");
 			if(!safegetzipfile(zip, path)) path = wbrels[i][1];
-			if(!safegetzipfile(zip, path)) path = wbrelsfile.replace(/_rels\/[\S\s]*$/,"") + wbrels[i][1];
+			if(!safegetzipfile(zip, path)) path = wbrelsfile.replace(/_rels\/.*$/,"") + wbrels[i][1];
 			stype = wbrels[i][2];
 		} else {
 			path = 'xl/worksheets/sheet'+(i+1-nmode)+"." + wbext;
@ -257,8 +240,6 @@ function parse_zip(zip/*:ZIP*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 		if(dir.vba.length > 0) out.vbaraw = getzipdata(zip,strip_front_slash(dir.vba[0]),true);
 		else if(dir.defaults && dir.defaults.bin === CT_VBA) out.vbaraw = getzipdata(zip, 'xl/vbaProject.bin',true);
 	}
-	// TODO: pass back content types metadata for xlsm/xlsx resolution
-	out.bookType = xlsb ? "xlsb" : "xlsx";
 	return out;
 }

--- a/bits/86_writezip.js
+++ b/bits/86_writezip.js
@ -1,4 +1,16 @@
-function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
+function write_zip(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
+	if(opts.bookType == "ods") return write_ods(wb, opts);
+	if(opts.bookType == "numbers") return write_numbers_iwa(wb, opts);
+	if(opts.bookType == "xlsb") return write_zip_xlsxb(wb, opts);
+	return write_zip_xlsx(wb, opts);
+}
+
+/* XLSX and XLSB writing are very similar.  Originally they were unified in one
+   export function.  This is horrible for tree shaking in the common case (most
+   applications need to export files in one format) so this function supports
+   both formats while write_zip_xlsx only handles XLSX */
+function write_zip_xlsxb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
+	_shapeid = 1024;
 	if(wb && !wb.SSF) {
 		wb.SSF = dup(table_fmt);
 	}
@ -12,8 +24,8 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 	opts.Strings = /*::((*/[]/*:: :any):SST)*/; opts.Strings.Count = 0; opts.Strings.Unique = 0;
 	if(browser_has_Map) opts.revStrings = new Map();
 	else { opts.revStrings = {}; opts.revStrings.foo = []; delete opts.revStrings.foo; }
-	var wbext = "bin";
-	var vbafmt = true;
+	var wbext = opts.bookType == "xlsb" ? "bin" : "xml";
+	var vbafmt = VBAFMTS.indexOf(opts.bookType) > -1;
 	var ct = new_ct();
 	fix_write_opts(opts = opts || {});
 	var zip = zip_new();
@ -51,9 +63,6 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 		add_rels(opts.rels, 4, f, RELS.CUST_PROPS);
 	}

-	var people = ["SheetJ5"];
-	opts.tcid = 0;
-
 	for(rId=1;rId <= wb.SheetNames.length; ++rId) {
 		var wsrels = {'!id':{}};
 		var ws = wb.Sheets[wb.SheetNames[rId-1]];
@ -63,7 +72,7 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 			/* falls through */
 		default:
 			f = "xl/worksheets/sheet" + rId + "." + wbext;
-			zip_add_file(zip, f, write_ws_bin(rId-1, opts, wb, wsrels));
+			zip_add_file(zip, f, write_ws(rId-1, f, opts, wb, wsrels));
 			ct.sheets.push(f);
 			add_rels(opts.wbrels, -1, "worksheets/sheet" + rId + "." + wbext, RELS.WS[0]);
 		}
@ -73,25 +82,14 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 			var need_vml = false;
 			var cf = "";
 			if(comments && comments.length > 0) {
-				var needtc = false;
-				comments.forEach(function(carr) {
-					carr[1].forEach(function(c) { if(c.T == true) needtc = true; });
-				});
-				if(needtc) {
-					cf = "xl/threadedComments/threadedComment" + rId + ".xml";
-					zip_add_file(zip, cf, write_tcmnt_xml(comments, people, opts));
-					ct.threadedcomments.push(cf);
-					add_rels(wsrels, -1, "../threadedComments/threadedComment" + rId + ".xml", RELS.TCMNT);
-				}
-
 				cf = "xl/comments" + rId + "." + wbext;
-				zip_add_file(zip, cf, write_comments_bin(comments, opts));
+				zip_add_file(zip, cf, write_cmnt(comments, cf, opts));
 				ct.comments.push(cf);
 				add_rels(wsrels, -1, "../comments" + rId + "." + wbext, RELS.CMNT);
 				need_vml = true;
 			}
 			if(ws['!legacy']) {
-				if(need_vml) zip_add_file(zip, "xl/drawings/vmlDrawing" + (rId) + ".vml", write_vml(rId, ws['!comments']));
+				if(need_vml) zip_add_file(zip, "xl/drawings/vmlDrawing" + (rId) + ".vml", write_comments_vml(rId, ws['!comments']));
 			}
 			delete ws['!comments'];
 			delete ws['!legacy'];
@ -102,28 +100,27 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {

 	if(opts.Strings != null && opts.Strings.length > 0) {
 		f = "xl/sharedStrings." + wbext;
-		zip_add_file(zip, f, write_sst_bin(opts.Strings, opts));
+		zip_add_file(zip, f, write_sst(opts.Strings, f, opts));
 		ct.strs.push(f);
 		add_rels(opts.wbrels, -1, "sharedStrings." + wbext, RELS.SST);
 	}

 	f = "xl/workbook." + wbext;
-	zip_add_file(zip, f, write_wb_bin(wb, opts));
+	zip_add_file(zip, f, write_wb(wb, f, opts));
 	ct.workbooks.push(f);
 	add_rels(opts.rels, 1, f, RELS.WB);

 	/* TODO: something more intelligent with themes */

 	f = "xl/theme/theme1.xml";
-	var ww = write_theme(wb.Themes, opts);
-	zip_add_file(zip, f, ww);
+	zip_add_file(zip, f, write_theme(wb.Themes, opts));
 	ct.themes.push(f);
 	add_rels(opts.wbrels, -1, "theme/theme1.xml", RELS.THEME);

 	/* TODO: something more intelligent with styles */

 	f = "xl/styles." + wbext;
-	zip_add_file(zip, f, write_sty_bin(wb, opts));
+	zip_add_file(zip, f, write_sty(wb, f, opts));
 	ct.styles.push(f);
 	add_rels(opts.wbrels, -1, "styles." + wbext, RELS.STY);

@ -135,17 +132,10 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 	}

 	f = "xl/metadata." + wbext;
-	zip_add_file(zip, f, write_xlmeta_bin());
+	zip_add_file(zip, f, write_xlmeta(f));
 	ct.metadata.push(f);
 	add_rels(opts.wbrels, -1, "metadata." + wbext, RELS.XLMETA);

-	if(people.length > 1) {
-		f = "xl/persons/person.xml";
-		zip_add_file(zip, f, write_people_xml(people, opts));
-		ct.people.push(f);
-		add_rels(opts.wbrels, -1, "persons/person.xml", RELS.PEOPLE);
-	}
-
 	zip_add_file(zip, "[Content_Types].xml", write_ct(ct, opts));
 	zip_add_file(zip, '_rels/.rels', write_rels(opts.rels));
 	zip_add_file(zip, 'xl/_rels/workbook.' + wbext + '.rels', write_rels(opts.wbrels));
@ -155,6 +145,7 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 }

 function write_zip_xlsx(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
+	_shapeid = 1024;
 	if(wb && !wb.SSF) {
 		wb.SSF = dup(table_fmt);
 	}
@ -234,10 +225,10 @@ function write_zip_xlsx(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 					carr[1].forEach(function(c) { if(c.T == true) needtc = true; });
 				});
 				if(needtc) {
-					cf = "xl/threadedComments/threadedComment" + rId + ".xml";
+					cf = "xl/threadedComments/threadedComment" + rId + "." + wbext;
 					zip_add_file(zip, cf, write_tcmnt_xml(comments, people, opts));
 					ct.threadedcomments.push(cf);
-					add_rels(wsrels, -1, "../threadedComments/threadedComment" + rId + ".xml", RELS.TCMNT);
+					add_rels(wsrels, -1, "../threadedComments/threadedComment" + rId + "." + wbext, RELS.TCMNT);
 				}

 				cf = "xl/comments" + rId + "." + wbext;
@ -247,7 +238,7 @@ function write_zip_xlsx(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 				need_vml = true;
 			}
 			if(ws['!legacy']) {
-				if(need_vml) zip_add_file(zip, "xl/drawings/vmlDrawing" + (rId) + ".vml", write_vml(rId, ws['!comments']));
+				if(need_vml) zip_add_file(zip, "xl/drawings/vmlDrawing" + (rId) + ".vml", write_comments_vml(rId, ws['!comments']));
 			}
 			delete ws['!comments'];
 			delete ws['!legacy'];
--- a/bits/87_read.js
+++ b/bits/87_read.js
@ -50,13 +50,7 @@ function read_plaintext_raw(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
 function read_utf16(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
 	var d = data;
 	if(o.type == 'base64') d = Base64_decode(d);
-	if(typeof ArrayBuffer !== "undefined" && data instanceof ArrayBuffer) d = new Uint8Array(data);
-	d = typeof $cptable !== "undefined" ? $cptable.utils.decode(1200, d.slice(2), 'str') : (
-		(has_buf && Buffer.isBuffer(data)) ? data.slice(2).toString("utf16le") :
-		(typeof Uint8Array !== "undefined" && d instanceof Uint8Array) ? (
-			typeof TextDecoder !== "undefined" ? new TextDecoder("utf-16le").decode(d.slice(2)) : utf16lereadu(d.slice(2))
-		) : utf16leread(d.slice(2))
-	);
+	d = $cptable.utils.decode(1200, d.slice(2), 'str');
 	o.type = "binary";
 	return read_plaintext(d, o);
 }
@ -73,7 +67,6 @@ function read_prn(data, d, o, str) {
 function readSync(data/*:RawData*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 	reset_cp();
 	var o = opts||{};
-	if(o.codepage && typeof $cptable === "undefined") console.error("Codepage tables are not loaded.  Non-ASCII characters may not give expected results");
 	if(typeof ArrayBuffer !== 'undefined' && data instanceof ArrayBuffer) return readSync(new Uint8Array(data), (o = dup(o), o.type = "array", o));
 	if(typeof Uint8Array !== 'undefined' && data instanceof Uint8Array && !o.type) o.type = typeof Deno !== "undefined" ? "buffer" : "array";
 	var d = data, n = [0,0,0,0], str = false;
@ -111,14 +104,9 @@ function readSync(data/*:RawData*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 			}
 			break;
 		case 0x03: case 0x83: case 0x8B: case 0x8C: return DBF.to_workbook(d, o);
-		case 0x7B: if(n[1] === 0x5C && n[2] === 0x72 && n[3] === 0x74) return rtf_to_workbook(d, o); break;
+		case 0x7B: if(n[1] === 0x5C && n[2] === 0x72 && n[3] === 0x74) return RTF.to_workbook(d, o); break;
 		case 0x0A: case 0x0D: case 0x20: return read_plaintext_raw(d, o);
 		case 0x89: if(n[1] === 0x50 && n[2] === 0x4E && n[3] === 0x47) throw new Error("PNG Image File is not a spreadsheet"); break;
-		case 0x08: if(n[1] === 0xE7) throw new Error("Unsupported Multiplan 1.x file!"); break;
-		case 0x0C:
-			if(n[1] === 0xEC) throw new Error("Unsupported Multiplan 2.x file!");
-			if(n[1] === 0xED) throw new Error("Unsupported Multiplan 3.x file!");
-			break;
 	}
 	if(DBF_SUPPORTED_VERSIONS.indexOf(n[0]) > -1 && n[2] <= 12 && n[3] <= 31) return DBF.to_workbook(d, o);
 	return read_prn(data, d, o, str);
--- a/bits/88_write.js
+++ b/bits/88_write.js
@ -9,15 +9,6 @@ function write_cfb_ctr(cfb/*:CFBContainer*/, o/*:WriteOpts*/)/*:any*/ {
 	return CFB.write(cfb, o);
 }

-function write_zip(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
-	switch(opts.bookType) {
-		case "ods": return write_ods(wb, opts);
-		case "numbers": return write_numbers_iwa(wb, opts);
-		case "xlsb": return write_zip_xlsb(wb, opts);
-		default: return write_zip_xlsx(wb, opts);
-	}
-}
-
 /*:: declare var encrypt_agile:any; */
 function write_zip_type(wb/*:Workbook*/, opts/*:?WriteOpts*/)/*:any*/ {
 	var o = dup(opts||{});
@ -81,7 +72,7 @@ function write_string_type(out/*:string*/, opts/*:WriteOpts*/, bom/*:?string*/)/

 function write_stxt_type(out/*:string*/, opts/*:WriteOpts*/)/*:any*/ {
 	switch(opts.type) {
-		case "base64": return Base64_encode_pass(out);
+		case "base64": return Base64_encode(out);
 		case "binary": return out;
 		case "string": return out; /* override in sheet_to_txt */
 		case "file": return write_dl(opts.file, out, 'binary');
@ -134,7 +125,7 @@ function writeSync(wb/*:Workbook*/, opts/*:?WriteOpts*/) {
 		case 'xml':
 		case 'xlml': return write_string_type(write_xlml(wb, o), o);
 		case 'slk':
-		case 'sylk': return write_string_type(SYLK.from_sheet(wb.Sheets[wb.SheetNames[idx]], o, wb), o);
+		case 'sylk': return write_string_type(SYLK.from_sheet(wb.Sheets[wb.SheetNames[idx]], o), o);
 		case 'htm':
 		case 'html': return write_string_type(sheet_to_html(wb.Sheets[wb.SheetNames[idx]], o), o);
 		case 'txt': return write_stxt_type(sheet_to_txt(wb.Sheets[wb.SheetNames[idx]], o), o);
@ -142,7 +133,7 @@ function writeSync(wb/*:Workbook*/, opts/*:?WriteOpts*/) {
 		case 'dif': return write_string_type(DIF.from_sheet(wb.Sheets[wb.SheetNames[idx]], o), o);
 		case 'dbf': return write_binary_type(DBF.from_sheet(wb.Sheets[wb.SheetNames[idx]], o), o);
 		case 'prn': return write_string_type(PRN.from_sheet(wb.Sheets[wb.SheetNames[idx]], o), o);
-		case 'rtf': return write_string_type(sheet_to_rtf(wb.Sheets[wb.SheetNames[idx]], o), o);
+		case 'rtf': return write_string_type(RTF.from_sheet(wb.Sheets[wb.SheetNames[idx]], o), o);
 		case 'eth': return write_string_type(ETH.from_sheet(wb.Sheets[wb.SheetNames[idx]], o), o);
 		case 'fods': return write_string_type(write_ods(wb, o), o);
 		case 'wk1': return write_binary_type(WK_.sheet_to_wk1(wb.Sheets[wb.SheetNames[idx]], o), o);
--- a/bits/90_utils.js
+++ b/bits/90_utils.js
@ -4,18 +4,18 @@ type MJRObject = {
 	isempty: boolean;
 };
 */
-function make_json_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, header/*:number*/, hdr/*:Array<any>*/, o/*:Sheet2JSONOpts*/)/*:MJRObject*/ {
+function make_json_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, header/*:number*/, hdr/*:Array<any>*/, dense/*:boolean*/, o/*:Sheet2JSONOpts*/)/*:MJRObject*/ {
 	var rr = encode_row(R);
 	var defval = o.defval, raw = o.raw || !Object.prototype.hasOwnProperty.call(o, "raw");
-	var isempty = true, dense = (sheet["!data"] != null);
+	var isempty = true;
 	var row/*:any*/ = (header === 1) ? [] : {};
 	if(header !== 1) {
 		if(Object.defineProperty) try { Object.defineProperty(row, '__rowNum__', {value:R, enumerable:false}); } catch(e) { row.__rowNum__ = R; }
 		else row.__rowNum__ = R;
 	}
-	if(!dense || sheet["!data"][R]) for (var C = r.s.c; C <= r.e.c; ++C) {
-		var val = dense ? (sheet["!data"][R]||[])[C] : sheet[cols[C] + rr];
-		if(val == null || val.t === undefined) {
+	if(!dense || sheet[R]) for (var C = r.s.c; C <= r.e.c; ++C) {
+		var val = dense ? sheet[R][C] : sheet[cols[C] + rr];
+		if(val === undefined || val.t === undefined) {
 			if(defval === undefined) continue;
 			if(hdr[C] != null) { row[hdr[C]] = defval; }
 			continue;
@ -24,12 +24,7 @@ function make_json_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Ar
 		switch(val.t){
 			case 'z': if(v == null) break; continue;
 			case 'e': v = (v == 0 ? null : void 0); break;
-			case 's': case 'b':
-			case 'n': if(!val.z || !fmt_is_date(val.z)) break;
-			v = numdate(v); // TODO: date1904 setting should also be stored in worksheet object
-			if(typeof v == "number") break;
-			/* falls through */
-			case 'd': if(!(o && (o.UTC||(o.raw === false)))) v = utc_to_local(new Date(v)); break;
+			case 's': case 'd': case 'b': case 'n': break;
 			default: throw new Error('unrecognized type ' + val.t);
 		}
 		if(hdr[C] != null) {
@ -39,7 +34,7 @@ function make_json_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Ar
 				else if(raw && v === null) row[hdr[C]] = null;
 				else continue;
 			} else {
-				row[hdr[C]] = (val.t === 'n' && typeof o.rawNumbers === 'boolean' ? o.rawNumbers : raw) ? v : format_cell(val, v, o);
+				row[hdr[C]] = raw && (val.t !== "n" || (val.t === "n" && o.rawNumbers !== false)) ? v : format_cell(val,v,o);
 			}
 			if(v != null) isempty = false;
 		}
@ -68,16 +63,16 @@ function sheet_to_json(sheet/*:Worksheet*/, opts/*:?Sheet2JSONOpts*/) {
 	var cols/*:Array<string>*/ = [];
 	var out/*:Array<any>*/ = [];
 	var outi = 0, counter = 0;
-	var dense = sheet["!data"] != null;
+	var dense = Array.isArray(sheet);
 	var R = r.s.r, C = 0;
 	var header_cnt = {};
-	if(dense && !sheet["!data"][R]) sheet["!data"][R] = [];
+	if(dense && !sheet[R]) sheet[R] = [];
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(C = r.s.c; C <= r.e.c; ++C) {
 		if(((colinfo[C]||{}).hidden)) continue;
 		cols[C] = encode_col(C);
-		val = dense ? sheet["!data"][R][C] : sheet[cols[C] + rr];
+		val = dense ? sheet[R][C] : sheet[cols[C] + rr];
 		switch(header) {
 			case 1: hdr[C] = C - r.s.c; break;
 			case 2: hdr[C] = cols[C]; break;
@ -96,7 +91,7 @@ function sheet_to_json(sheet/*:Worksheet*/, opts/*:?Sheet2JSONOpts*/) {
 	}
 	for (R = r.s.r + offset; R <= r.e.r; ++R) {
 		if ((rowinfo[R]||{}).hidden) continue;
-		var row = make_json_row(sheet, r, R, cols, header, hdr, o);
+		var row = make_json_row(sheet, r, R, cols, header, hdr, dense, o);
 		if((row.isempty === false) || (header === 1 ? o.blankrows !== false : !!o.blankrows)) out[outi++] = row.row;
 	}
 	out.length = outi;
@ -107,11 +102,9 @@ var qreg = /"/g;
 function make_csv_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, fs/*:number*/, rs/*:number*/, FS/*:string*/, o/*:Sheet2CSVOpts*/)/*:?string*/ {
 	var isempty = true;
 	var row/*:Array<string>*/ = [], txt = "", rr = encode_row(R);
-	var dense = sheet["!data"] != null;
-	var datarow = dense && sheet["!data"][R] || [];
 	for(var C = r.s.c; C <= r.e.c; ++C) {
 		if (!cols[C]) continue;
-		var val = dense ? datarow[C]: sheet[cols[C] + rr];
+		var val = o.dense ? (sheet[R]||[])[C]: sheet[cols[C] + rr];
 		if(val == null) txt = "";
 		else if(val.v != null) {
 			isempty = false;
@ -125,7 +118,6 @@ function make_csv_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Arr
 		/* NOTE: Excel CSV does not support array formulae */
 		row.push(txt);
 	}
-	if(o.strip) while(row[row.length - 1] === "") --row.length;
 	if(o.blankrows === false && isempty) return null;
 	return row.join(FS);
 }
@ -137,7 +129,9 @@ function sheet_to_csv(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/)/*:string*/ {
 	var r = safe_decode_range(sheet["!ref"]);
 	var FS = o.FS !== undefined ? o.FS : ",", fs = FS.charCodeAt(0);
 	var RS = o.RS !== undefined ? o.RS : "\n", rs = RS.charCodeAt(0);
+	var endregex = new RegExp((FS=="|" ? "\\|" : FS)+"+$");
 	var row = "", cols/*:Array<string>*/ = [];
+	o.dense = Array.isArray(sheet);
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(var C = r.s.c; C <= r.e.c; ++C) if (!((colinfo[C]||{}).hidden)) cols[C] = encode_col(C);
@ -146,8 +140,10 @@ function sheet_to_csv(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/)/*:string*/ {
 		if ((rowinfo[R]||{}).hidden) continue;
 		row = make_csv_row(sheet, r, R, cols, fs, rs, FS, o);
 		if(row == null) { continue; }
+		if(o.strip) row = row.replace(endregex,"");
 		if(row || (o.blankrows !== false)) out.push((w++ ? RS : "") + row);
 	}
+	delete o.dense;
 	return out.join("");
 }

@ -164,13 +160,13 @@ function sheet_to_formulae(sheet/*:Worksheet*/)/*:Array<string>*/ {
 	if(sheet == null || sheet["!ref"] == null) return [];
 	var r = safe_decode_range(sheet['!ref']), rr = "", cols/*:Array<string>*/ = [], C;
 	var cmds/*:Array<string>*/ = [];
-	var dense = sheet["!data"] != null;
+	var dense = Array.isArray(sheet);
 	for(C = r.s.c; C <= r.e.c; ++C) cols[C] = encode_col(C);
 	for(var R = r.s.r; R <= r.e.r; ++R) {
 		rr = encode_row(R);
 		for(C = r.s.c; C <= r.e.c; ++C) {
 			y = cols[C] + rr;
-			x = dense ? (sheet["!data"][R]||[])[C] : sheet[y];
+			x = dense ? (sheet[R]||[])[C] : sheet[y];
 			val = "";
 			if(x === undefined) continue;
 			else if(x.F != null) {
@ -195,11 +191,8 @@ function sheet_to_formulae(sheet/*:Worksheet*/)/*:Array<string>*/ {

 function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet*/ {
 	var o = opts || {};
-	var dense = _ws ? (_ws["!data"] != null) : o.dense;
-	if(DENSE != null && dense == null) dense = DENSE;
 	var offset = +!o.skipHeader;
-	var ws/*:Worksheet*/ = _ws || ({});
-	if(!_ws && dense) ws["!data"] = [];
+	var ws/*:Worksheet*/ = _ws || ({}/*:any*/);
 	var _R = 0, _C = 0;
 	if(ws && o.origin != null) {
 		if(typeof o.origin == 'number') _R = o.origin;
@ -208,6 +201,7 @@ function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet
 			_R = _origin.r; _C = _origin.c;
 		}
 	}
+	var cell/*:Cell*/;
 	var range/*:Range*/ = ({s: {c:0, r:0}, e: {c:_C, r:_R + js.length - 1 + offset}}/*:any*/);
 	if(ws['!ref']) {
 		var _range = safe_decode_range(ws['!ref']);
@ -218,35 +212,29 @@ function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet
 		if(_R == -1) { _R = 0; range.e.r = js.length - 1 + offset; }
 	}
 	var hdr/*:Array<string>*/ = o.header || [], C = 0;
-	var ROW = [];
+
 	js.forEach(function (JS, R/*:number*/) {
-		if(dense && !ws["!data"][_R + R + offset]) ws["!data"][_R + R + offset] = [];
-		if(dense) ROW = ws["!data"][_R + R + offset];
 		keys(JS).forEach(function(k) {
 			if((C=hdr.indexOf(k)) == -1) hdr[C=hdr.length] = k;
 			var v = JS[k];
 			var t = 'z';
 			var z = "";
-			var ref = dense ? "" : (encode_col(_C + C) + encode_row(_R + R + offset));
-			var cell/*:Cell*/ = dense ? ROW[_C + C] : ws[ref];
+			var ref = encode_cell({c:_C + C,r:_R + R + offset});
+			cell = ws_get_cell_stub(ws, ref);
 			if(v && typeof v === 'object' && !(v instanceof Date)){
-				if(dense) ROW[_C + C] = v;
-				else ws[ref] = v;
+				ws[ref] = v;
 			} else {
 				if(typeof v == 'number') t = 'n';
 				else if(typeof v == 'boolean') t = 'b';
 				else if(typeof v == 'string') t = 's';
 				else if(v instanceof Date) {
 					t = 'd';
-					if(!o.UTC) v = local_to_utc(v);
 					if(!o.cellDates) { t = 'n'; v = datenum(v); }
-					z = (cell != null && cell.z && fmt_is_date(cell.z)) ? cell.z : (o.dateNF || table_fmt[14]);
+					z = (o.dateNF || table_fmt[14]);
 				}
 				else if(v === null && o.nullError) { t = 'e'; v = 0; }
-				if(!cell) {
-					if(!dense) ws[ref] = cell = ({t:t, v:v}/*:any*/);
-					else ROW[_C + C] = cell = ({t:t, v:v}/*:any*/);
-				} else {
+				if(!cell) ws[ref] = cell = ({t:t, v:v}/*:any*/);
+				else {
 					cell.t = t; cell.v = v;
 					delete cell.w; delete cell.R;
 					if(z) cell.z = z;
@ -257,11 +245,7 @@ function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet
 	});
 	range.e.c = Math.max(range.e.c, _C + hdr.length - 1);
 	var __R = encode_row(_R);
-	if(dense && !ws["!data"][_R]) ws["!data"][_R] = [];
-	if(offset) for(C = 0; C < hdr.length; ++C) {
-		if(dense) ws["!data"][_R][C + _C] = {t:'s', v:hdr[C]};
-		else ws[encode_col(C + _C) + __R] = {t:'s', v:hdr[C]};
-	}
+	if(offset) for(C = 0; C < hdr.length; ++C) ws[encode_col(C + _C) + __R] = {t:'s', v:hdr[C]};
 	ws['!ref'] = encode_range(range);
 	return ws;
 }
@ -271,17 +255,18 @@ function json_to_sheet(js/*:Array<any>*/, opts)/*:Worksheet*/ { return sheet_add
 function ws_get_cell_stub(ws/*:Worksheet*/, R, C/*:?number*/)/*:Cell*/ {
 	/* A1 cell address */
 	if(typeof R == "string") {
-		if(ws["!data"] != null) {
+		/* dense */
+		if(Array.isArray(ws)) {
 			var RC = decode_cell(R);
-			if(!ws["!data"][RC.r]) ws["!data"][RC.r] = [];
-			return ws["!data"][RC.r][RC.c] || (ws["!data"][RC.r][RC.c] = {t:'z'});
+			if(!ws[RC.r]) ws[RC.r] = [];
+			return ws[RC.r][RC.c] || (ws[RC.r][RC.c] = {t:'z'});
 		}
 		return ws[R] || (ws[R] = {t:'z'});
 	}
 	/* cell address object */
 	if(typeof R != "number") return ws_get_cell_stub(ws, encode_cell(R));
 	/* R and C are 0-based indices */
-	return ws_get_cell_stub(ws, encode_col(C||0) + encode_row(R));
+	return ws_get_cell_stub(ws, encode_cell({r:R,c:C||0}));
 }

 /* find sheet index for given name / validate index */
@ -296,11 +281,9 @@ function wb_sheet_idx(wb/*:Workbook*/, sh/*:number|string*/) {
 	} else throw new Error("Cannot find sheet |" + sh + "|");
 }

-/* simple blank or single-sheet workbook object */
-function book_new(ws/*:?Worksheet*/, wsname/*:?string*/)/*:Workbook*/ {
-	var wb = { SheetNames: [], Sheets: {} };
-	if(ws) book_append_sheet(wb, ws, wsname || "Sheet1");
-	return wb;
+/* simple blank workbook object */
+function book_new()/*:Workbook*/ {
+	return { SheetNames: [], Sheets: {} };
 }

 /* add a worksheet to the end of a given workbook */
@ -308,10 +291,10 @@ function book_append_sheet(wb/*:Workbook*/, ws/*:Worksheet*/, name/*:?string*/,
 	var i = 1;
 	if(!name) for(; i <= 0xFFFF; ++i, name = undefined) if(wb.SheetNames.indexOf(name = "Sheet" + i) == -1) break;
 	if(!name || wb.SheetNames.length >= 0xFFFF) throw new Error("Too many worksheets");
-	if(roll && wb.SheetNames.indexOf(name) >= 0 && name.length < 32) {
-		var m = name.match(/\d+$/); // at this point, name length is capped at 32
-		i = m && +m[0] || 0;
-		var root = m && name.slice(0, m.index) || name;
+	if(roll && wb.SheetNames.indexOf(name) >= 0) {
+		var m = name.match(/(^.*?)(\d+)$/);
+		i = m && +m[2] || 0;
+		var root = m && m[1] || name;
 		for(++i; i <= 0xFFFF; ++i) if(wb.SheetNames.indexOf(name = root + i) == -1) break;
 	}
 	check_ws_name(name);
@ -377,12 +360,6 @@ function sheet_set_array_formula(ws/*:Worksheet*/, range, formula/*:string*/, dy
 			if(dynamic) cell.D = true;
 		}
 	}
-	var wsr = decode_range(ws["!ref"]);
-	if(wsr.s.r > rng.s.r) wsr.s.r = rng.s.r;
-	if(wsr.s.c > rng.s.c) wsr.s.c = rng.s.c;
-	if(wsr.e.r < rng.e.r) wsr.e.r = rng.e.r;
-	if(wsr.e.c < rng.e.c) wsr.e.c = rng.e.c;
-	ws["!ref"] = encode_range(wsr);
 	return ws;
 }

--- a/bits/95_api.js
+++ b/bits/95_api.js
@ -9,7 +9,6 @@ var utils/*:any*/ = {
 	decode_cell: decode_cell,
 	decode_range: decode_range,
 	format_cell: format_cell,
-	sheet_new: sheet_new,
 	sheet_add_aoa: sheet_add_aoa,
 	sheet_add_json: sheet_add_json,
 	sheet_add_dom: sheet_add_dom,
--- a/bits/97_node.js
+++ b/bits/97_node.js
@ -8,7 +8,9 @@ function write_csv_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	var r = safe_decode_range(sheet["!ref"]);
 	var FS = o.FS !== undefined ? o.FS : ",", fs = FS.charCodeAt(0);
 	var RS = o.RS !== undefined ? o.RS : "\n", rs = RS.charCodeAt(0);
+	var endregex = new RegExp((FS=="|" ? "\\|" : FS)+"+$");
 	var row/*:?string*/ = "", cols/*:Array<string>*/ = [];
+	o.dense = Array.isArray(sheet);
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<RowInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(var C = r.s.c; C <= r.e.c; ++C) if (!((colinfo[C]||{}).hidden)) cols[C] = encode_col(C);
@ -21,6 +23,7 @@ function write_csv_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 			if ((rowinfo[R-1]||{}).hidden) continue;
 			row = make_csv_row(sheet, r, R-1, cols, fs, rs, FS, o);
 			if(row != null) {
+				if(o.strip) row = row.replace(endregex,"");
 				if(row || (o.blankrows !== false)) return stream.push((w++ ? RS : "") + row);
 			}
 		}
@ -37,6 +40,7 @@ function write_html_stream(ws/*:Worksheet*/, opts/*:?Sheet2HTMLOpts*/) {
 	var footer = o.footer != null ? o.footer : HTML_END;
 	stream.push(header);
 	var r = decode_range(ws['!ref']);
+	o.dense = Array.isArray(ws);
 	stream.push(make_html_preamble(ws, r, o));
 	var R = r.s.r;
 	var end = false;
@ -74,16 +78,16 @@ function write_json_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	var rr = encode_row(r.s.r);
 	var cols/*:Array<string>*/ = [];
 	var counter = 0;
-	var dense = sheet["!data"] != null;
+	var dense = Array.isArray(sheet);
 	var R = r.s.r, C = 0;
 	var header_cnt = {};
-	if(dense && !sheet["!data"][R]) sheet["!data"][R] = [];
+	if(dense && !sheet[R]) sheet[R] = [];
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<RowInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(C = r.s.c; C <= r.e.c; ++C) {
 		if(((colinfo[C]||{}).hidden)) continue;
 		cols[C] = encode_col(C);
-		val = dense ? sheet["!data"][R][C] : sheet[cols[C] + rr];
+		val = dense ? sheet[R][C] : sheet[cols[C] + rr];
 		switch(header) {
 			case 1: hdr[C] = C - r.s.c; break;
 			case 2: hdr[C] = cols[C]; break;
@ -104,7 +108,7 @@ function write_json_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	stream._read = function() {
 		while(R <= r.e.r) {
 			if ((rowinfo[R-1]||{}).hidden) continue;
-			var row = make_json_row(sheet, r, R, cols, header, hdr, o);
+			var row = make_json_row(sheet, r, R, cols, header, hdr, dense, o);
 			++R;
 			if((row.isempty === false) || (header === 1 ? o.blankrows !== false : !!o.blankrows)) {
 				stream.push(row.row);
@ -120,5 +124,5 @@ var __stream = {
 	to_json: write_json_stream,
 	to_html: write_html_stream,
 	to_csv: write_csv_stream,
-	set_readable: set_readable
+  set_readable: set_readable
 };
--- a/bits/98_exports.js
+++ b/bits/98_exports.js
@ -10,13 +10,10 @@ XLSX.writeFileAsync = writeFileAsync;
 XLSX.utils = utils;
 XLSX.writeXLSX = writeSyncXLSX;
 XLSX.writeFileXLSX = writeFileSyncXLSX;
-XLSX.set_fs = set_fs;
-XLSX.set_cptable = set_cptable;
 XLSX.SSF = SSF;
 if(typeof __stream !== "undefined") XLSX.stream = __stream;
 if(typeof CFB !== "undefined") XLSX.CFB = CFB;
 if(typeof require !== "undefined") {
  var strmod = require('stream');
  if((strmod||{}).Readable) set_readable(strmod.Readable);
-	try { _fs = require('fs'); } catch(e) {}
 }
--- a/book.json
+++ b/book.json
@ -0,0 +1,27 @@
+{
+	"root": "./misc/docs",
+	"title": "SheetJS js-xlsx",
+	"author": "sheetjs",
+	"gitbook": "3.2.2",
+	"plugins": ["anchorjs", "ga", "sidebar-ad", "-sharing", "-search", "advanced-emoji", "-lunr"],
+	"pluginsConfig": {
+		"anchorjs": {
+			"icon": "#",
+			"placement": "left",
+			"visible": "always"
+		},
+		"ga": {
+			"token": "UA-36810333-1"
+		},
+		"sidebar-ad": {
+			"imageUrl": "http://oss.sheetjs.com/assets/img/logo.png",
+			"url": "http://sheetjs.com"
+		},
+		"theme-default": {
+			"showLevel": false,
+			"styles": {
+				"website": "style.css"
+			}
+		}
+	}
+}
--- a/demos/README.md
+++ b/demos/README.md
@ -0,0 +1,59 @@
+# Demos
+
+These demos are intended to demonstrate how to load this library in various
+ecosystems.  The library is designed to be used in the web browser and in node
+contexts, using dynamic feature tests to pull in features when necessary.  This
+works extremely well in common use cases: script tag insertion and node require.
+
+Systems like webpack try to be clever by performing simple static analysis to
+pull in code.  However, they do not support dynamic type tests, breaking
+compatibility with traditional scripts.  Configuration is required.  The demos
+cover basic configuration steps for various systems and should "just work".
+
+Mobile app and other larger demos do not include the full build structure. The
+demos have `Makefile` scripts that show how to reproduce the full projects.  The
+scripts have been tested against iOS and OSX.  For Windows platforms, GNU make
+can be installed with Bash on Windows or with `cygwin`.
+
+### Included Demos
+
+**Frameworks and APIs**
+- [`angularjs`](angular/)
+- [`angular and ionic`](angular2/)
+- [`knockout`](knockout/)
+- [`meteor`](meteor/)
+- [`react and react-native`](react/)
+- [`vue 2.x and weex`](vue/)
+- [`XMLHttpRequest and fetch`](xhr/)
+- [`nodejs server`](server/)
+- [`databases and key/value stores`](database/)
+- [`typed arrays and math`](array/)
+
+**Bundlers and Tooling**
+- [`browserify`](browserify/)
+- [`fusebox`](fusebox/)
+- [`parcel`](parcel/)
+- [`requirejs`](requirejs/)
+- [`rollup`](rollup/)
+- [`systemjs`](systemjs/)
+- [`typescript`](typescript/)
+- [`webpack 2.x`](webpack/)
+
+**Platforms and Integrations**
+- [`deno`](deno/)
+- [`electron application`](electron/)
+- [`nw.js application`](nwjs/)
+- [`Chrome / Chromium extensions`](chrome/)
+- [`Download a Google Sheet locally`](google-sheet/)
+- [`Adobe ExtendScript`](extendscript/)
+- [`Headless Browsers`](headless/)
+- [`canvas-datagrid`](datagrid/)
+- [`x-spreadsheet`](xspreadsheet/)
+- [`react-data-grid`](react/modify/)
+- [`Swift JSC and other engines`](altjs/)
+- [`"serverless" functions`](function/)
+- [`internet explorer`](oldie/)
+
+Other examples are included in the [showcase](demos/showcase/).
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/altjs/.gitignore
+++ b/demos/altjs/.gitignore
@ -0,0 +1,10 @@
+sheetjs.*
+SheetJSSwift
+duk*
+*.class
+*.jar
+rhino
+shim.min.js
+xlsx.*.js
+payload.js
+goja
--- a/demos/altjs/.swiftlint.yml
+++ b/demos/altjs/.swiftlint.yml
@ -0,0 +1,3 @@
+disabled_rules:
+  - trailing_semicolon
+  - identifier_name
--- a/demos/altjs/Makefile
+++ b/demos/altjs/Makefile
@ -0,0 +1,60 @@
+.PHONY: all
+all: duktape nashorn rhinojs swift goja
+
+.PHONY: base
+base:
+	if [ ! -e sheetjs.xlsx ]; then node ../../tests/write.js; fi
+	if [ ! -e xlsx.full.min.js ]; then cp ../../dist/xlsx.full.min.js .; fi
+	if [ ! -e shim.min.js ]; then cp ../../dist/shim.min.js .; fi
+
+.PHONY: duk
+duk: base
+	bash ./duktape.sh
+	gcc -std=c99 -Wall -osheetjs.duk sheetjs.duk.c duktape.c -lm
+
+.PHONY: duktape
+duktape: duk ## duktape demo
+	for ext in xlsx xlsb biff8.xls xml.xls; do ./sheetjs.duk sheetjs.$$ext; done
+
+.PHONY: nashorn
+nashorn: base ## nashorn demo
+	jjs nashorn.js
+
+.PHONY: swift
+swift: base ## swift demo
+	swiftc SheetJSCore.swift main.swift -o SheetJSSwift
+	./SheetJSSwift
+
+.PHONY: goja
+goja: base ## goja demo
+	go build goja.go
+	for ext in xlsx xlsb biff8.xls xml.xls; do ./goja sheetjs.$$ext; done
+
+.PHONY: chakra
+chakra: base ## Chakra demo
+	node -pe "fs.writeFileSync('payload.js', 'var payload = \"' + fs.readFileSync('sheetjs.xlsx').toString('base64') + '\";')"
+	cat global.js xlsx.full.min.js payload.js chakra.js > xlsx.chakra.js
+	chakra ./xlsx.chakra.js
+
+.PHONY: rhinojs ## rhino demo
+rhinojs: base SheetJSRhino.class
+	for ext in xlsx xlsb biff8.xls xml.xls; do java -cp .:SheetJS.jar:rhino.jar SheetJSRhino sheetjs.$$ext; done
+
+RHDEPS=$(filter-out SheetJSRhino.class,$(patsubst %.java,%.class,$(wildcard com/sheetjs/*.java)))
+$(RHDEPS): %.class: %.java rhino.jar
+	javac -cp .:SheetJS.jar:rhino.jar $*.java
+
+SheetJSRhino.class: $(RHDEPS)
+	jar -cf SheetJS.jar $^ xlsx.full.min.js
+	javac -cp .:SheetJS.jar:rhino.jar SheetJSRhino.java
+
+rhino.jar:
+	if [ ! -e rhino ]; then git clone --depth=1 https://github.com/mozilla/rhino; fi
+	#if [ ! -e rhino/build/rhino*/js.jar ]; then cd rhino; ant jar; fi
+	#cp rhino/build/rhino*/js.jar rhino.jar
+	if [ ! -e rhino/buildGradle/libs/rhino-[0-1]*.jar ]; then cd rhino; ./gradlew jar; fi
+	cp rhino/buildGradle/libs/rhino-[0-9]*.jar rhino.jar
+
+.PHONY: clean
+clean:
+	rm SheetJS.jar *.class com/sheetjs/*.class
--- a/demos/altjs/README.md
+++ b/demos/altjs/README.md
@ -0,0 +1,186 @@
+# Other JS Engines and Deployments
+
+There are many JS engines and deployments outside of web browsers. NodeJS is the
+most popular deployment, but there are many others for special use cases.  Some
+optimize for low overhead and others optimize for ease of embedding within other
+applications.  Since it was designed for ES3 engines, the library can be used in
+those settings!  This demo tries to demonstrate a few alternative deployments.
+
+Some engines provide no default global object.  To create a global reference:
+
+```js
+var global = (function(){ return this; }).call(null);
+```
+
+
+## Swift + JavaScriptCore
+
+iOS and OSX ship with the JavaScriptCore framework for running JS scripts from
+Swift and Objective-C.  Hybrid function invocation is tricky, but explicit data
+passing is straightforward.  The demo shows a standalone example for OSX.  For
+playgrounds, the library should be copied to shared playground data directory
+(usually `~/Documents/Shared Playground Data`):
+
+```swift
+/* This only works in a playground, see SheetJSCore.swift for standalone use */
+import JavaScriptCore;
+import PlaygroundSupport;
+
+/* build path variable for the library */
+let shared_dir = PlaygroundSupport.playgroundSharedDataDirectory;
+let lib_path = shared_dir.appendingPathComponent("xlsx.full.min.js");
+
+/* prepare JS context */
+var context: JSContext! = JSContext();
+var src = "var global = (function(){ return this; }).call(null);";
+context.evaluateScript(src);
+
+/* load library */
+var lib = try? String(contentsOf: lib_path);
+context.evaluateScript(lib);
+let XLSX: JSValue! = context.objectForKeyedSubscript("XLSX");
+
+/* to verify the library was loaded, get the version string */
+let XLSXversion: JSValue! = XLSX.objectForKeyedSubscript("version")
+var version  = XLSXversion.toString();
+```
+
+Binary strings can be passed back and forth using `String.Encoding.isoLatin1`:
+
+```swift
+/* parse sheetjs.xls */
+let file_path = shared_dir.appendingPathComponent("sheetjs.xls");
+let data: String! = try String(contentsOf: file_path, encoding: String.Encoding.isoLatin1);
+context.setObject(data, forKeyedSubscript: "payload" as (NSCopying & NSObjectProtocol));
+src = "var wb = XLSX.read(payload, {type:'binary'});";
+context.evaluateScript(src);
+
+/* write to sheetjsw.xlsx  */
+let out_path = shared_dir.appendingPathComponent("sheetjsw.xlsx");
+src = "var out = XLSX.write(wb, {type:'binary', bookType:'xlsx'})";
+context.evaluateScript(src);
+let outvalue: JSValue! = context.objectForKeyedSubscript("out");
+var out: String! = outvalue.toString();
+try? out.write(to: out_path, atomically: false, encoding: String.Encoding.isoLatin1);
+```
+
+
+## Nashorn
+
+Nashorn ships with Java 8.  It includes a command-line tool `jjs` for running JS
+scripts.  It is somewhat limited but does offer access to the full Java runtime.
+
+The `load` function in `jjs` can load the minified source directly:
+
+```js
+var global = (function(){ return this; }).call(null);
+load('xlsx.full.min.js');
+```
+
+The Java `nio` API provides the `Files.readAllBytes` method to read a file into
+a byte array.  To use in `XLSX.read`, the demo copies the bytes into a plain JS
+array and calls `XLSX.read` with type `"array"`.
+
+
+## Rhino
+
+[Rhino](http://www.mozilla.org/rhino) is an ES3+ engine written in Java.  The
+`SheetJSRhino` class and `com.sheetjs` package show a complete JAR deployment,
+including the full XLSX source.
+
+Due to code generation errors, optimization must be turned off:
+
+```java
+Context context = Context.enter();
+context.setOptimizationLevel(-1);
+```
+
+
+## ChakraCore
+
+ChakraCore is an embeddable JS engine written in C++.  The library and binary
+distributions include a command-line tool `chakra` for running JS scripts.
+
+The simplest way to interact with the engine is to pass Base64 strings. The make
+target builds a very simple payload with the data.
+
+
+## Duktape
+
+[Duktape](http://duktape.org/) is an embeddable JS engine written in C.  The
+amalgamation makes integration extremely simple!  It supports `Buffer` natively
+but should be sliced before processing:
+
+```C
+/* parse a C char array as a workbook object */
+duk_push_external_buffer(ctx);
+duk_config_buffer(ctx, -1, buf, len);
+duk_put_global_string(ctx, "buf");
+duk_eval_string_noresult("workbook = XLSX.read(buf.slice(0, buf.length), {type:'buffer'});");
+
+/* write a workbook object to a C char array */
+duk_eval_string(ctx, "XLSX.write(workbook, {type:'array', bookType:'xlsx'})");
+duk_size_t sz;
+char *buf = (char *)duk_get_buffer_data(ctx, -1, sz);
+duk_pop(ctx);
+```
+
+
+## QuickJS
+
+QuickJS is an embeddable JS engine written in C.  It provides a separate set of
+functions for interacting with the filesystem and the global object.  It can run
+the browser dist build.
+
+The `global` object is available as `std.global`.  To make it visible to the
+loader, create a reference to itself:
+
+```js
+std.global.global = std.global;
+std.loadScript("xlsx.full.min.js");
+```
+
+The filesystem interaction mirrors POSIX, including separate allocations:
+
+```js
+/* read file */
+var rh = std.open(filename, "rb"); rh.seek(0, std.SEEK_END);
+var sz = rh.tell(); rh.seek();
+var ab = new ArrayBuffer(sz); rh.read(ab, 0, sz); rh.close();
+var wb = XLSX.read(ab, {type: 'array'});
+
+/* write file */
+var ab = XLSX.write(wb, {type: 'array'});
+var wh = std.open("sheetjs.qjs.xlsx", "wb");
+wh.write(out, 0, ab.byteLength); wh.close();
+```
+
+
+## Goja
+
+Goja is a pure Go implementation of ECMAScript 5.  `[]byte` should be converted
+to a binary string in the engine:
+
+```go
+/* read file */
+data, _ := ioutil.ReadFile("sheetjs.xlsx")
+
+/* load into engine */
+vm.Set("buf", data)
+
+/* convert to binary string */
+_, _ = vm.RunString("var bstr = ''; for(var i = 0; i < buf.length; ++i) bstr += String.fromCharCode(buf[i]);")
+
+/* parse */
+wb, _ = vm.RunString("wb = XLSX.read(bstr, {type:'binary', cellNF:true});")
+```
+
+On the write side, `"base64"` strings can be decoded in Go:
+
+```go
+b64str, _ := vm.RunString("XLSX.write(wb, {type:'base64', bookType:'xlsx'})")
+buf, _ := base64.StdEncoding.DecodeString(b64str.String())
+_ = ioutil.WriteFile("sheetjs.xlsx", buf, 0644)
+```
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/altjs/SJSPlayground.swift
+++ b/demos/altjs/SJSPlayground.swift
@ -0,0 +1,37 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* This only works in a playground, see SheetJSCore.swift for standalone use */
+import JavaScriptCore;
+import PlaygroundSupport;
+
+/* build path variable for the library */
+let shared_dir = PlaygroundSupport.playgroundSharedDataDirectory;
+let lib_path = shared_dir.appendingPathComponent("xlsx.full.min.js");
+
+/* prepare JS context */
+var context: JSContext! = JSContext();
+var src = "var global = (function(){ return this; }).call(null);";
+context.evaluateScript(src);
+
+/* load library */
+var lib = try? String(contentsOf: lib_path);
+context.evaluateScript(lib);
+let XLSX: JSValue! = context.objectForKeyedSubscript("XLSX");
+
+/* to verify the library was loaded, get the version string */
+let XLSXversion: JSValue! = XLSX.objectForKeyedSubscript("version")
+var version  = XLSXversion.toString();
+
+/* parse sheetjs.xls */
+let file_path = shared_dir.appendingPathComponent("sheetjs.xls");
+let data: String! = try String(contentsOf: file_path, encoding: String.Encoding.isoLatin1);
+context.setObject(data, forKeyedSubscript: "payload" as (NSCopying & NSObjectProtocol)!);
+src = "var wb = XLSX.read(payload, {type:'binary'});";
+context.evaluateScript(src);
+
+/* write to sheetjsw.xlsx  */
+let out_path = shared_dir.appendingPathComponent("sheetjsw.xlsx");
+src = "var out = XLSX.write(wb, {type:'binary', bookType:'xlsx'})";
+context.evaluateScript(src);
+let outvalue: JSValue! = context.objectForKeyedSubscript("out");
+var out: String! = outvalue.toString();
+try? out.write(to: out_path, atomically: false, encoding: String.Encoding.isoLatin1);
--- a/demos/altjs/SheetJSCore.swift
+++ b/demos/altjs/SheetJSCore.swift
@ -0,0 +1,96 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+import JavaScriptCore;
+
+enum SJSError: Error {
+  case badJSContext;
+  case badJSWorkbook;
+  case badJSWorksheet;
+};
+
+class SJSWorksheet {
+  var context: JSContext!;
+  var wb: JSValue; var ws: JSValue;
+  var idx: Int32;
+
+  func toCSV() throws -> String {
+    let XLSX: JSValue! = context.objectForKeyedSubscript("XLSX");
+    let utils: JSValue! = XLSX.objectForKeyedSubscript("utils");
+    let sheet_to_csv: JSValue! = utils.objectForKeyedSubscript("sheet_to_csv");
+    return sheet_to_csv.call(withArguments: [ws]).toString();
+  }
+
+  init(ctx: JSContext, workbook: JSValue, worksheet: JSValue, idx: Int32) throws {
+    self.context = ctx; self.wb = workbook; self.ws = worksheet; self.idx = idx;
+  }
+}
+
+class SJSWorkbook {
+  var context: JSContext!;
+  var wb: JSValue; var SheetNames: JSValue; var Sheets: JSValue;
+
+  func getSheetAtIndex(idx: Int32) throws -> SJSWorksheet {
+    let SheetName: String = SheetNames.atIndex(Int(idx)).toString();
+    let ws: JSValue! = Sheets.objectForKeyedSubscript(SheetName);
+    return try SJSWorksheet(ctx: context, workbook: wb, worksheet: ws, idx: idx);
+  }
+
+  func writeBStr(bookType: String = "xlsx") throws -> String {
+    let XLSX: JSValue! = context.objectForKeyedSubscript("XLSX");
+    context.evaluateScript(String(format: "var writeopts = {type:'binary', bookType:'%@'}", bookType));
+    let writeopts: JSValue = context.objectForKeyedSubscript("writeopts");
+    let writefunc: JSValue = XLSX.objectForKeyedSubscript("write");
+    return writefunc.call(withArguments: [wb, writeopts]).toString();
+  }
+
+  init(ctx: JSContext, wb: JSValue) throws {
+    self.context = ctx;
+    self.wb = wb;
+    self.SheetNames = wb.objectForKeyedSubscript("SheetNames");
+    self.Sheets = wb.objectForKeyedSubscript("Sheets");
+  }
+}
+
+class SheetJSCore {
+  var context: JSContext!;
+  var XLSX: JSValue!;
+
+  func init_context() throws -> JSContext {
+    var context: JSContext!
+    do {
+      context = JSContext();
+      context.exceptionHandler = { _, X in if let e = X { print(e.toString()!); }; };
+      context.evaluateScript("var global = (function(){ return this; }).call(null);");
+      context.evaluateScript("if(typeof wbs == 'undefined') wbs = [];");
+      let src = try String(contentsOfFile: "xlsx.full.min.js");
+      context.evaluateScript(src);
+      if context != nil { return context!; }
+    } catch { print(error.localizedDescription); }
+    throw SJSError.badJSContext;
+  }
+
+  func version() throws -> String {
+    if let version = XLSX.objectForKeyedSubscript("version") { return version.toString(); }
+    throw SJSError.badJSContext;
+  }
+
+  func readFile(file: String) throws -> SJSWorkbook {
+    let data: String! = try String(contentsOfFile: file, encoding: String.Encoding.isoLatin1);
+    return try readBStr(data: data);
+  }
+
+  func readBStr(data: String) throws -> SJSWorkbook {
+    context.setObject(data, forKeyedSubscript: "payload" as (NSCopying & NSObjectProtocol));
+    context.evaluateScript("var wb = XLSX.read(payload, {type:'binary'});");
+    let wb: JSValue! = context.objectForKeyedSubscript("wb");
+    if wb == nil { throw SJSError.badJSWorkbook; }
+    return try SJSWorkbook(ctx: context, wb: wb);
+  }
+
+  init() throws {
+    do {
+      self.context = try init_context();
+      self.XLSX = self.context.objectForKeyedSubscript("XLSX");
+      if self.XLSX == nil { throw SJSError.badJSContext; }
+    } catch { print(error.localizedDescription); }
+  }
+}
--- a/demos/altjs/SheetJSRhino.java
+++ b/demos/altjs/SheetJSRhino.java
@ -0,0 +1,31 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+import com.sheetjs.SheetJS;
+import com.sheetjs.SheetJSFile;
+import com.sheetjs.SheetJSSheet;
+
+public class SheetJSRhino {
+  public static void main(String args[]) throws Exception {
+    try {
+      SheetJS sjs = new SheetJS();
+
+      /* open file */
+      SheetJSFile xl = sjs.read_file(args[0]);
+
+      /* get sheetnames */
+      String[] sheetnames = xl.get_sheet_names();
+      System.err.println(sheetnames[0]);
+
+      /* convert to CSV */
+      SheetJSSheet sheet = xl.get_sheet(0);
+      String csv = sheet.get_csv();
+
+      System.out.println(csv);
+
+    } catch(Exception e) {
+      throw e;
+    } finally {
+      SheetJS.close();
+    }
+  }
+}
--- a/demos/altjs/chakra.js
+++ b/demos/altjs/chakra.js
@ -0,0 +1,3 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+var wb = XLSX.read(payload, {type:'base64'});
+console.log(XLSX.utils.sheet_to_csv(wb.Sheets[wb.SheetNames[0]]));
--- a/demos/altjs/com/sheetjs/JSHelper.java
+++ b/demos/altjs/com/sheetjs/JSHelper.java
@ -0,0 +1,51 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+package com.sheetjs;
+
+import java.lang.Integer;
+import java.lang.StringBuilder;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import org.mozilla.javascript.Context;
+import org.mozilla.javascript.NativeArray;
+import org.mozilla.javascript.NativeObject;
+import org.mozilla.javascript.Scriptable;
+
+public class JSHelper {
+  static String read_file(String file) throws IOException {
+    byte[] b = Files.readAllBytes(Paths.get(file));
+    System.out.println(b.length);
+    StringBuilder sb = new StringBuilder();
+    for(int i = 0; i < b.length; ++i) sb.append(Character.toString((char)(b[i] < 0 ? b[i] + 256 : b[i])));
+    return sb.toString();
+  }
+
+  static Object get_object(String path, Object base) throws ObjectNotFoundException {
+    int idx = path.indexOf(".");
+    Scriptable b = (Scriptable)base;
+    if(idx == -1) return b.get(path, b);
+    Object o = b.get(path.substring(0,idx), b);
+    if(o == Scriptable.NOT_FOUND) throw new ObjectNotFoundException("not found: |" + path.substring(0,idx) + "|" + Integer.toString(idx));
+    return get_object(path.substring(idx+1), (NativeObject)o);
+  }
+
+  static Object[] get_array(String path, Object base) throws ObjectNotFoundException {
+    NativeArray arr = (NativeArray)get_object(path, base);
+    Object[] out = new Object[(int)arr.getLength()];
+    int idx;
+    for(Object o : arr.getIds()) out[idx = (Integer)o] = arr.get(idx, arr);
+    return out;
+  }
+
+  static String[] get_string_array(String path, Object base) throws ObjectNotFoundException {
+    NativeArray arr = (NativeArray)get_object(path, base);
+    String[] out = new String[(int)arr.getLength()];
+    int idx;
+    for(Object o : arr.getIds()) out[idx = (Integer)o] = arr.get(idx, arr).toString();
+    return out;
+  }
+
+  public static void close() { Context.exit(); }
+
+}
--- a/demos/altjs/com/sheetjs/ObjectNotFoundException.java
+++ b/demos/altjs/com/sheetjs/ObjectNotFoundException.java
@ -0,0 +1,10 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+package com.sheetjs;
+
+import java.lang.Exception;
+
+public class ObjectNotFoundException extends Exception {
+  public ObjectNotFoundException() {}
+  public ObjectNotFoundException(String message) { super(message); }
+}
--- a/demos/altjs/com/sheetjs/SheetJS.java
+++ b/demos/altjs/com/sheetjs/SheetJS.java
@ -0,0 +1,58 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+package com.sheetjs;
+
+import java.lang.Integer;
+import java.util.Scanner;
+import java.io.IOException;
+import java.io.File;
+import org.mozilla.javascript.Context;
+import org.mozilla.javascript.Function;
+import org.mozilla.javascript.NativeObject;
+import org.mozilla.javascript.Scriptable;
+
+public class SheetJS {
+  public Scriptable scope;
+  public Context cx;
+  public NativeObject nXLSX;
+
+  public SheetJS() throws Exception {
+    this.cx = Context.enter();
+    this.scope = this.cx.initStandardObjects();
+
+    /* boilerplate */
+    cx.setOptimizationLevel(-1);
+    String s = "var global = (function(){ return this; }).call(null);";
+    cx.evaluateString(scope, s, "<cmd>", 1, null);
+
+    /* eval library */
+    s = new Scanner(SheetJS.class.getResourceAsStream("/xlsx.full.min.js")).useDelimiter("\\Z").next();
+    //s = new Scanner(new File("xlsx.full.min.js")).useDelimiter("\\Z").next();
+    cx.evaluateString(scope, s, "<cmd>", 1, null);
+
+    /* grab XLSX variable */
+    Object XLSX = scope.get("XLSX", scope);
+    if(XLSX == Scriptable.NOT_FOUND) throw new Exception("XLSX not found");
+    this.nXLSX = (NativeObject)XLSX;
+  }
+
+  public SheetJSFile read_file(String filename) throws IOException, ObjectNotFoundException {
+    /* open file */
+    String d = JSHelper.read_file(filename);
+
+    /* options argument */
+    NativeObject q = (NativeObject)this.cx.evaluateString(this.scope, "q = {'type':'binary', 'WTF':1};", "<cmd>", 2, null);
+
+    /* set up function arguments */
+    Object args[] = {d, q};
+
+    /* call read -> wb workbook */
+    Function readfunc = (Function)JSHelper.get_object("XLSX.read",this.scope);
+    NativeObject wb = (NativeObject)readfunc.call(this.cx, this.scope, this.nXLSX, args);
+
+    return new SheetJSFile(wb, this);
+  }
+
+  public static void close() { JSHelper.close(); }
+}
+
--- a/demos/altjs/com/sheetjs/SheetJSFile.java
+++ b/demos/altjs/com/sheetjs/SheetJSFile.java
@ -0,0 +1,24 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+package com.sheetjs;
+
+import org.mozilla.javascript.NativeObject;
+import org.mozilla.javascript.Function;
+
+public class SheetJSFile {
+  public NativeObject wb;
+  public SheetJS sheetjs;
+  public SheetJSFile() {}
+  public SheetJSFile(NativeObject wb, SheetJS sheetjs) { this.wb = wb; this.sheetjs = sheetjs; }
+  public String[] get_sheet_names() {
+    try {
+      return JSHelper.get_string_array("SheetNames", this.wb);
+    } catch(ObjectNotFoundException e) {
+      return null;
+    }
+  }
+  public SheetJSSheet get_sheet(int idx) throws ObjectNotFoundException {
+    return new SheetJSSheet(this, idx);
+  }
+}
+
--- a/demos/altjs/com/sheetjs/SheetJSSheet.java
+++ b/demos/altjs/com/sheetjs/SheetJSSheet.java
@ -0,0 +1,29 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+package com.sheetjs;
+
+import org.mozilla.javascript.Function;
+import org.mozilla.javascript.NativeObject;
+
+public class SheetJSSheet {
+  public NativeObject ws;
+  public SheetJSFile wb;
+  public SheetJSSheet(SheetJSFile wb, int idx) throws ObjectNotFoundException {
+    this.wb = wb;
+    this.ws = (NativeObject)JSHelper.get_object("Sheets." + wb.get_sheet_names()[idx],wb.wb);
+  }
+  public String get_range() throws ObjectNotFoundException {
+    return JSHelper.get_object("!ref",this.ws).toString();
+  }
+  public String get_string_value(String address) throws ObjectNotFoundException {
+    return JSHelper.get_object(address + ".v",this.ws).toString();
+  }
+
+  public String get_csv() throws ObjectNotFoundException {
+    Function csvify = (Function)JSHelper.get_object("XLSX.utils.sheet_to_csv",this.wb.sheetjs.scope);
+    Object csvArgs[] = {this.ws};
+    Object csv = csvify.call(this.wb.sheetjs.cx, this.wb.sheetjs.scope, this.wb.sheetjs.scope, csvArgs);
+    return csv.toString();
+  }
+}
+
--- a/demos/altjs/duktape.sh
+++ b/demos/altjs/duktape.sh
@ -0,0 +1,16 @@
+#!/bin/bash
+DUKTAPE_VER=2.6.0
+if [ ! -e duktape-$DUKTAPE_VER ]; then
+	if [ ! -e duktape-$DUKTAPE_VER.tar ]; then
+		if [ ! -e duktape-$DUKTAPE_VER.tar.xz ]; then
+			curl -O https://duktape.org/duktape-$DUKTAPE_VER.tar.xz
+		fi
+		xz -d duktape-$DUKTAPE_VER.tar.xz
+	fi
+	tar -xf duktape-$DUKTAPE_VER.tar
+fi
+
+for f in duktape.{c,h} duk_config.h; do
+	cp duktape-$DUKTAPE_VER/src/$f .
+done
+
--- a/demos/altjs/global.js
+++ b/demos/altjs/global.js
@ -0,0 +1,3 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+var global = (function(){ return this; }).call(null);
+
--- a/demos/altjs/goja.go
+++ b/demos/altjs/goja.go
@ -0,0 +1,71 @@
+package main
+
+import (
+	b64 "encoding/base64"
+	"fmt"
+	"os"
+	"io/ioutil"
+	"github.com/dop251/goja"
+)
+
+func safe_run_file(vm *goja.Runtime, file string) {
+	data, err := ioutil.ReadFile(file)
+	if err != nil { panic(err) }
+	src := string(data)
+	_, err = vm.RunString(src)
+	if err != nil { panic(err) }
+}
+
+func eval_string(vm *goja.Runtime, cmd string) goja.Value {
+	v, err := vm.RunString(cmd)
+	if err != nil { panic(err) }
+	return v
+}
+
+func write_type(vm *goja.Runtime, t string) {
+	/* due to some wonkiness with array passing, use base64 */
+	b64str := eval_string(vm, "XLSX.write(wb, {type:'base64', bookType:'" + t + "'})")
+	buf, err := b64.StdEncoding.DecodeString(b64str.String());
+	if err != nil { panic(err) }
+	err = ioutil.WriteFile("sheetjsg." + t, buf, 0644)
+	if err != nil { panic(err) }
+}
+
+func main() {
+	vm := goja.New()
+
+	/* initialize */
+	eval_string(vm, "if(typeof global == 'undefined') global = (function(){ return this; }).call(null);")
+
+	/* load library */
+	safe_run_file(vm, "shim.min.js")
+	safe_run_file(vm, "xlsx.full.min.js")
+
+	/* get version string */
+	v := eval_string(vm, "XLSX.version")
+	fmt.Printf("SheetJS library version %s\n", v)
+
+	/* read file */
+	data, err := ioutil.ReadFile(os.Args[1])
+	if err != nil { panic(err) }
+	vm.Set("buf", data)
+	fmt.Printf("Loaded file %s\n", os.Args[1])
+
+	/* parse workbook */
+	eval_string(vm, "var bstr = ''; for(var i = 0; i < buf.length; ++i) bstr += String.fromCharCode(buf[i]);")
+	eval_string(vm, "wb = XLSX.read(bstr, {type:'binary', cellNF:true});")
+	eval_string(vm, "ws = wb.Sheets[wb.SheetNames[0]]")
+
+	/* print CSV */
+	csv := eval_string(vm, "XLSX.utils.sheet_to_csv(ws)")
+	fmt.Printf("%s\n", csv)
+
+	/* change cell A1 to 3 */
+	eval_string(vm, "ws['A1'].v = 3; delete ws['A1'].w;")
+
+	/* write file */
+	//write_type(vm, "xlsb")
+	//write_type(vm, "xlsx")
+	write_type(vm, "xls")
+	write_type(vm, "csv")
+}
--- a/demos/altjs/main.swift
+++ b/demos/altjs/main.swift
@ -0,0 +1,21 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+
+let sheetjs = try SheetJSCore();
+
+try print(sheetjs.version());
+
+let filenames: [[String]] = [
+  ["xlsx", "xlsx"],
+  ["xlsb", "xlsb"],
+  ["biff8.xls", "xls"],
+  ["xml.xls", "xlml"]
+];
+
+for fn in filenames {
+  let wb: SJSWorkbook = try sheetjs.readFile(file: "sheetjs." + fn[0]);
+  let ws: SJSWorksheet = try wb.getSheetAtIndex(idx: 0);
+  let csv: String = try ws.toCSV();
+  print(csv);
+  let wbout: String = try wb.writeBStr(bookType: fn[1]);
+  try wbout.write(toFile: "sheetjsswift." + fn[0], atomically: false, encoding: String.Encoding.isoLatin1);
+}
--- a/demos/altjs/nashorn.js
+++ b/demos/altjs/nashorn.js
@ -0,0 +1,36 @@
+#!/usr/bin/env jjs
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+
+/* load module */
+var global = (function(){ return this; }).call(null);
+load('xlsx.full.min.js');
+
+/* helper to convert byte array to plain JS array */
+function b2a(b) {
+	var out = new Array(b.length);
+	for(var i = 0; i < out.length; i++) out[i] = (b[i] < 0 ? b[i] + 256 : b[i]);
+	return out;
+}
+
+function process_file(path) {
+	java.lang.System.out.println(path);
+
+	/* read file */
+	var path = java.nio.file.Paths.get(path);
+	var bytes = java.nio.file.Files.readAllBytes(path);
+	var u8a = b2a(bytes);
+
+	/* read data */
+	var wb = XLSX.read(u8a, {type:"array"});
+
+	/* get first worksheet as an array of arrays */
+	var ws = wb.Sheets[wb.SheetNames[0]];
+	var js = XLSX.utils.sheet_to_json(ws, {header:1});
+
+	/* print out every line */
+	js.forEach(function(l) { java.lang.System.out.println(JSON.stringify(l)); });
+}
+
+process_file('sheetjs.xlsx');
+process_file('sheetjs.xlsb');
+process_file('sheetjs.biff8.xls');
--- a/demos/altjs/qjs.js
+++ b/demos/altjs/qjs.js
@ -0,0 +1,25 @@
+#!/usr/bin/env qjs
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+/* load XLSX */
+std.global.global = std.global;
+std.loadScript("xlsx.full.min.js");
+
+/* read contents of file */
+var rh = std.open("sheetjs.xlsx", "rb");
+rh.seek(0, std.SEEK_END);
+var sz = rh.tell();
+var ab = new ArrayBuffer(sz);
+rh.seek();
+rh.read(ab, 0, sz);
+rh.close();
+
+/* parse file */
+var wb = XLSX.read(ab, {type: 'array'});
+
+/* write array */
+var out = XLSX.write(wb, {type: 'array'});
+
+/* write contents to file */
+var wh = std.open("sheetjs.qjs.xlsx", "wb");
+wh.write(out, 0, out.byteLength);
+wh.close();
--- a/demos/altjs/sheetjs.duk.c
+++ b/demos/altjs/sheetjs.duk.c
@ -0,0 +1,110 @@
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "duktape.h"
+
+#define FAIL_LOAD { \
+	duk_push_undefined(ctx); \
+	perror("Error in load_file"); \
+	return 1; \
+}
+
+static char *read_file(const char *filename, size_t *sz) {
+	FILE *f = fopen(filename, "rb");
+	if(!f) return NULL;
+	long fsize; { fseek(f, 0, SEEK_END); fsize = ftell(f); fseek(f, 0, SEEK_SET); }
+	char *buf = (char *)malloc(fsize * sizeof(char));
+	*sz = fread((void *) buf, 1, fsize, f);
+	fclose(f);
+	return buf;
+}
+
+static duk_int_t eval_file(duk_context *ctx, const char *filename) {
+	size_t len; char *buf = read_file(filename, &len);
+	if(!buf) FAIL_LOAD
+
+	duk_push_lstring(ctx, (const char *)buf, (duk_size_t)len);
+	duk_int_t retval = duk_peval(ctx);
+	duk_pop(ctx);
+	return retval;
+}
+
+static duk_int_t load_file(duk_context *ctx, const char *filename, const char *var) {
+	size_t len; char *buf = read_file(filename, &len);
+	if(!buf) FAIL_LOAD
+
+	duk_push_external_buffer(ctx);
+	duk_config_buffer(ctx, -1, buf, len);
+	duk_put_global_string(ctx, var);
+	return 0;
+}
+
+static duk_int_t save_file(duk_context *ctx, const char *filename, const char *var) {
+	duk_get_global_string(ctx, var);
+	duk_size_t sz;
+	char *buf = (char *)duk_get_buffer_data(ctx, -1, &sz);
+
+	if(!buf) return 1;
+	FILE *f = fopen(filename, "wb"); fwrite(buf, 1, sz, f); fclose(f);
+	return 0;
+}
+
+#define FAIL(cmd) { \
+	printf("error in %s: %s\n", cmd, duk_safe_to_string(ctx, -1)); \
+	duk_destroy_heap(ctx); \
+	return res; \
+}
+
+#define DOIT(cmd) duk_eval_string_noresult(ctx, cmd);
+int main(int argc, char *argv[]) {
+	duk_int_t res = 0;
+
+	/* initialize */
+	duk_context *ctx = duk_create_heap_default();
+	/* duktape does not expose a standard "global" by default */
+	DOIT("var global = (function(){ return this; }).call(null);");
+
+	/* load library */
+	res = eval_file(ctx, "shim.min.js");
+	if(res != 0) FAIL("shim load")
+	res = eval_file(ctx, "xlsx.full.min.js");
+	if(res != 0) FAIL("library load")
+
+	/* get version string */
+	duk_eval_string(ctx, "XLSX.version");
+	printf("SheetJS library version %s\n", duk_get_string(ctx, -1));
+	duk_pop(ctx);
+
+	/* read file */
+	res = load_file(ctx, argv[1], "buf");
+	if(res != 0) FAIL("file load")
+	printf("Loaded file %s\n", argv[1]);
+
+	/* parse workbook */
+	DOIT("wb = XLSX.read(buf, {type:'buffer', cellNF:true});");
+	DOIT("ws = wb.Sheets[wb.SheetNames[0]]");
+
+	/* print CSV */
+	duk_eval_string(ctx, "XLSX.utils.sheet_to_csv(ws)");
+	printf("%s\n", duk_get_string(ctx, -1));
+	duk_pop(ctx);
+
+	/* change cell A1 to 3 */
+	DOIT("ws['A1'].v = 3; delete ws['A1'].w;");
+
+	/* write file */
+#define WRITE_TYPE(BOOKTYPE) \
+	DOIT("newbuf = (XLSX.write(wb, {type:'array', bookType:'" BOOKTYPE "'}));");\
+	res = save_file(ctx, "sheetjsw." BOOKTYPE, "newbuf");\
+	if(res != 0) FAIL("save sheetjsw." BOOKTYPE)
+
+	WRITE_TYPE("xlsb")
+	WRITE_TYPE("xlsx")
+	WRITE_TYPE("xls")
+	WRITE_TYPE("csv")
+
+	/* cleanup */
+	duk_destroy_heap(ctx);
+	return res;
+}
--- a/Show More
+++ b/Show More