fix #2752 sheet_to_csv skips first blank line with blankrows: true option

sheet_to_csv skips first blank line with blankrows: true option
2022-08-26 22:10:19 +02:00
192 changed files with 20116 additions and 38950 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/.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]
@ -23,21 +22,17 @@ 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
 *.sheetjs
 *.exe
 *.img
-test_files.zip
-test_files/
--- a/.gitmodules
+++ b/.gitmodules
@ -0,0 +1,3 @@
+[submodule "test_files"]
+	path = test_files
+	url = https://github.com/SheetJS/test_files
--- a/.npmignore
+++ b/.npmignore
@ -11,7 +11,6 @@ node_modules
 *.jsx
 _book
 book.json
-v8.log
 tmp
 *.[tT][xX][tT]
 *.[cC][sS][vV]
@ -20,7 +19,6 @@ tmp
 *.[pP][mM][dD]*
 *.[pP][dD][fF]
 *.[sS][lL][kK]
-*.[sS][yY][lL][kK]
 *.socialcalc
 *.[xX][lL][sSwWcCaAtTmMrR]
 *.[xX][lL][sSaAtT][xXmMbB]
@ -34,7 +32,6 @@ tmp
 *.[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]
@ -61,11 +58,11 @@ make.cmd
 xlsworker.js
 shim.js
 test.js
+hotcross.mjs
 test.mjs
 test.ts
 test.mts
 testnocp.ts
-testbun.mjs
 .jscs.json
 .gitmodules
 .travis.yml
--- a/.spelling
+++ b/.spelling
@ -54,7 +54,6 @@ Rollup
 SessionStorage
 SQLite
 SystemJS
-Vite
 VueJS
 WebKit
 WebSQL
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -4,78 +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.

-* Sheet Visibility for ODS / FODS (h/t @edemaine)
-* HTML DOM ingress support formulae (`data-f`)
-* Proper handling of XLSX encoded entities (h/t @inreoh)
-
-## v0.20.3
-
-* Correct parsing of NUMBERS and ODS merge cells (h/t @s-ashwin)
-* More precise treatment of infinite and NaN values
-* XLML Streaming Write
-* Parse `Int8Array` objects (for compatibility with JS engines in Java)
-* CSV Export only quote leading ID (h/t @lako12)
-
-## 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
@ -93,7 +21,7 @@ changes may not be included if they are not expected to break existing code.
 ## v0.18.8

 * Plaintext parsing of dateless meridien time values (`1:23:45 PM`)
-* Legacy format (SYLK / WK# / Multiplan) minutiae
+* Legacy format (SYLK / WK# / Multiplan) minutiae 

 ## v0.18.7

--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -4,17 +4,17 @@ The SheetJS Libraries should be free and clear to use in your projects.  In
 order to maintain that, every contributor must be vigilant.

 There have been many projects in the past that have been very lax regarding
-licensing. We are of the opinion that those are ticking timebombs and that no
-commercial product should depend on them.
+licensing, and we are of the opinion that those are ticking timebombs and that
+no commercial product should depend on them.


 # Required Reading

 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
@ -30,9 +30,10 @@ inbox is self-hosted.

 # Opening Pull Requests

-[Squash commits](https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History)
-before opening a pull request, If the pull request addresses documentation or
-demos, add `[ci skip]` in the body or title of the commit message to skip tests.
+Before opening a pull request, [squash all commits into 
+one](https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History). If the pull 
+request addresses documentation or demos, add `[ci skip]` in the body or title 
+of your commit message to skip Travis checks.

 # Pre-Contribution Checklist

@ -56,8 +57,8 @@ issue.  If it is a particularly high-priority issue, please drop an email to
 Keep these in mind as you work:

 - Your contributions are your original work.  Take note of any resources you
-  consult in the process. Be extra careful not to use unlicensed code on the
-  Internet or code generated by a large language model or other AI tool.
+  consult in the process (and be extra careful not to use unlicensed code on
+  the internet.

 - You are working on your own time.  Unless they explicitly grant permission,
  your employer may be the ultimate owner of your IP
--- a/32
+++ b/32
@ -67,9 +67,10 @@ 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 all
 	mkdir -p tmp

 DISTHDR=misc/suppress_export.js
@ -106,13 +107,12 @@ 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: git
@ -140,10 +140,6 @@ test mocha: test.js ## Run test suite
 #*                      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 $<
@ -152,27 +148,22 @@ test.ts: test.mts
 	node -pe 'var data = fs.readFileSync("'$<'", "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: test.test.mjs ## Run Bun test suite
-	bun test $<
+test-bun: hotcross.mjs ## Run Bun test suite
+	bun $<

 .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 $<
+	deno test --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 --config misc/test.deno.jsonc $<

 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_%:
@ -254,7 +245,8 @@ 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
+DEMOMDS=$(sort $(wildcard demos/*/README.md))
+MDLINT=$(DEMOMDS) README.md demos/README.md
 .PHONY: mdlint
 mdlint: $(MDLINT) ## Check markdown documents
 	./node_modules/.bin/alex $^
--- a/README.md
+++ b/README.md
@ -9,27 +9,35 @@ Edit complex templates with ease; let out your inner Picasso with styling; make
 custom sheets with images/graphs/PivotTables; evaluate formula expressions and
 port calculations to web apps; automate common spreadsheet tasks, and much more!

+[![License](https://img.shields.io/github/license/SheetJS/sheetjs)](https://github.com/SheetJS/sheetjs/blob/master/LICENSE)
+[![Build Status](https://img.shields.io/github/workflow/status/sheetjs/sheetjs/Tests:%20node.js)](https://github.com/SheetJS/sheetjs/actions)
+[![Snyk Vulnerabilities](https://img.shields.io/snyk/vulnerabilities/github/SheetJS/sheetjs)](https://snyk.io/test/github/SheetJS/sheetjs)
+[![npm Downloads](https://img.shields.io/npm/dm/xlsx.svg)](https://cdn.sheetjs.com/)
+[![GitHub Repo stars](https://img.shields.io/github/stars/SheetJS/sheetjs?style=social)](https://github.com/SheetJS/sheetjs)
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/sheetjs?pixel)](https://github.com/SheetJS/sheetjs)
+
+[![Build Status](https://saucelabs.com/browser-matrix/sheetjs.svg)](https://saucelabs.com/u/sheetjs)
+
 ## Documentation

 - [API and Usage Documentation](https://docs.sheetjs.com)

 - [Downloadable Scripts and Modules](https://cdn.sheetjs.com)

-## Constellation
+## Related Projects

 - <https://oss.sheetjs.com/notes/>: File Format Notes

 - [`ssf`](packages/ssf): Format data using ECMA-376 spreadsheet format codes

- [`xlsx-cli`](packages/xlsx-cli): NodeJS command-line tool for processing files
+- [`xlsx-cli`](packages/xlsx-cli/): NodeJS command-line tool for processing files

- [`cfb`](https://git.sheetjs.com/SheetJS/js-cfb): Container (OLE/ZIP) file
-processing library
+- [`test_files`](https://github.com/SheetJS/test_files): Sample spreadsheets

- [`codepage`](https://git.sheetjs.com/SheetJS/js-codepage): Legacy text
-encodings for XLS and other legacy spreadsheet formats
+- [`cfb`](https://github.com/SheetJS/js-cfb): Container (OLE/ZIP) format library

- [`dta`](packages/dta): Stata DTA file processor
+- [`codepage`](https://github.com/SheetJS/js-codepage): Legacy text encodings

 ## License

--- 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 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 = '0.20.3';
+XLSX.version = '0.18.10';
--- a/bits/02_codepage.js
+++ b/bits/02_codepage.js
@ -6,26 +6,26 @@ var $cptable;
 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 +41,6 @@ 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));
--- a/bits/04_base64.js
+++ b/bits/04_base64.js
@ -45,35 +45,10 @@ function Base64_encode_pass(input) {
  }
  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, "");
+  input = input.replace(/^data:([^\/]+\/[^\/]+)?;base64\,/, "").replace(/[^\w\+\/\=]/g, "");
  for (var i = 0; i < input.length; ) {
    e1 = Base64_map.indexOf(input.charAt(i++));
    e2 = Base64_map.indexOf(input.charAt(i++));
--- a/bits/05_buf.js
+++ b/bits/05_buf.js
@ -71,7 +71,7 @@ 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 */
@ -243,7 +240,6 @@ function SSF_large_exp(v/*:number*/)/*:string*/ {
 }

 function SSF_general_num(v/*:number*/)/*:string*/ {
-	if(!isFinite(v)) return isNaN(v) ? "#NUM!" : "#DIV/0!";
 	var V = Math.floor(Math.log(Math.abs(v))*Math.LOG10E), o;

 	if(V >= -4 && V <= -1) o = v.toPrecision(10+V);
@ -273,7 +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);
 }
@ -341,7 +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 */
@ -409,7 +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;
@ -789,11 +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;
@ -803,29 +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;
 	}

@ -941,8 +926,6 @@ function choose_fmt(f/*:string*/, v/*:any*/) {
 	if(l<4 && lat>-1) --l;
 	if(fmt.length > 4) throw new Error("cannot find right format for |" + fmt.join("|") + "|");
 	if(typeof v !== "number") return [4, fmt.length === 4 || lat>-1?fmt[fmt.length-1]:"@"];
-	/* NOTE: most spreadsheet software do not support NaN or infinities */
-	if(typeof v === "number" && !isFinite(v)) v = 0;
 	switch(fmt.length) {
 		case 1: fmt = lat>-1 ? ["General", "General", "General", fmt[0]] : [fmt[0], fmt[0], fmt[0], "@"]; break;
 		case 2: fmt = lat>-1 ? [fmt[0], fmt[0], fmt[0], fmt[1]] : [fmt[0], fmt[1], fmt[0], "@"]; break;
@ -974,13 +957,11 @@ 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";
 	else if(v === "" || v == null) return "";
-	else if(isNaN(v) && f[1].indexOf("0") > -1) return "#NUM!";
-	else if(!isFinite(v) && f[1].indexOf("0") > -1) return "#DIV/0!";
 	return eval_fmt(f[1], v, o, f[0]);
 }
 function SSF_load(fmt/*:string*/, idx/*:?number*/)/*:number*/ {
--- 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;
--- a/bits/18_cfb.js
+++ b/bits/18_cfb.js
@ -42,9 +42,7 @@ type CFBFiles = {[n:string]:CFBEntry};
 var CRC32 = /*#__PURE__*/(function() {
 var CRC32 = {};
 CRC32.version = '1.2.0';
-/*::
-type CRC32TableType = Array<number> | Int32Array;
-*/
+/* see perf/crc32table.js */
 /*global Int32Array */
 function signed_crc_table()/*:any*/ {
 	var c = 0, table/*:Array<number>*/ = new Array(256);
@ -75,14 +73,14 @@ 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);
 var T1 = TT[0],  T2 = TT[1],  T3 = TT[2],  T4 = TT[3],  T5 = TT[4];
 var T6 = TT[5],  T7 = TT[6],  T8 = TT[7],  T9 = TT[8],  Ta = TT[9];
 var Tb = TT[10], Tc = TT[11], Td = TT[12], Te = TT[13], Tf = TT[14];
-function crc32_bstr(bstr/*:string*/, seed/*:?number*/)/*:number*/ {
+function crc32_bstr(bstr/*:string*/, seed/*:number*/)/*:number*/ {
 	var C = seed/*:: ? 0 : 0 */ ^ -1;
 	for(var i = 0, L = bstr.length; i < L;) C = (C>>>8) ^ T0[(C^bstr.charCodeAt(i++))&0xFF];
 	return ~C;
@ -308,7 +306,7 @@ 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;
@ -771,9 +769,9 @@ 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);
+		if(_nm.length > 32) {
+			console.error("Name " + _nm + " will be truncated to " + _nm.slice(0,32));
+			_nm = _nm.slice(0, 32);
 		}
 		flen = 2*(_nm.length+1);
 		o.write_shift(64, _nm, "utf16le");
@ -1448,8 +1446,8 @@ function parse_local_file(blob/*:CFBlob*/, csz/*:number*/, usz/*:number*/, o/*:C
 		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[0x0001]||{}).usz) _usz = ef[0x0001].usz;
+			if((EF[0x0001]||{}).csz) _csz = ef[0x0001].csz;
 		}
 	}
 	blob.l += efsz;
@ -1460,7 +1458,7 @@ function parse_local_file(blob/*:CFBlob*/, csz/*:number*/, usz/*:number*/, o/*:C
 	var data = blob.slice(blob.l, blob.l + _csz);
 	switch(meth) {
 		case 8: data = _inflateRawSync(blob, _usz); break;
-		case 0: blob.l += _csz; break; // TODO: scan for magic number
+		case 0: break; // TODO: scan for magic number
 		default: throw new Error("Unsupported ZIP Compression method " + meth);
 	}

@ -1495,17 +1493,16 @@ function write_zip(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes*/

 	for(i = 1; i < cfb.FullPaths.length; ++i) {
 		fp = cfb.FullPaths[i].slice(root.length); fi = cfb.FileIndex[i];
-		if(!fi.size || !fi.content || (Array.isArray(fi.content) && fi.content.length == 0) || fp == "\u0001Sh33tJ5") continue;
+		if(!fi.size || !fi.content || fp == "\u0001Sh33tJ5") continue;
 		var start = start_cd;

-
 		/* TODO: CP437 filename */
 		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 */
@ -1686,7 +1683,7 @@ 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
@ -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;
 }

@ -74,22 +77,28 @@ 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*/ {
@ -120,18 +129,8 @@ 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 +153,39 @@ 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));
+    /* TODO: 1904 adjustment, keep in sync with base date */
+    if(!M[2]) return new Date(1899,11,30,(+M[1]%12) + (M[7] == "p" ? 12 : 0), 0, 0, 0);
+    if(M[3]) {
+        if(M[4]) return new Date(1899,11,30,(+M[1]%12) + (M[7] == "p" ? 12 : 0), +M[2], +M[4], parseFloat(M[3])*1000);
+        else return new Date(1899,11,30,(M[7] == "p" ? 12 : 0), +M[1], +M[2], parseFloat(M[3])*1000);
+    }
+    else if(M[5]) return new Date(1899,11,30, (+M[1]%12) + (M[7] == "p" ? 12 : 0), +M[2], +M[5], M[6] ? parseFloat(M[6]) * 1000 : 0);
+    else return new Date(1899,11,30,(+M[1]%12) + (M[7] == "p" ? 12 : 0), +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;
 	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;
+	if(y < 0 || y > 8099 || s.match(/[^-0-9:,\/\\]/)) return n;
 	return o;
 }

@ -216,165 +198,3 @@ 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/21_ziputils.js
+++ b/bits/21_ziputils.js
@ -67,9 +67,6 @@ function zipentries(zip) {

 function zip_add_file(zip, path, content) {
 	if(zip.FullPaths) {
-		if(Array.isArray(content) && typeof content[0] == "string") {
-			content = content.join("");
-		}
 		if(typeof content == "string") {
 			var res;
 			if(has_buf) res = Buffer_from(content);
--- 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;
@ -32,26 +32,6 @@ function parsexmltag(tag/*:string*/, skip_root/*:?boolean*/, skip_LC/*:?boolean*
 	}
 	return z;
 }
-function parsexmltagraw(tag/*:string*/, skip_root/*:?boolean*/, skip_LC/*:?boolean*/)/*:any*/ {
-	var z = ({}/*:any*/);
-	var eq = 0, c = 0;
-	for(; eq !== tag.length; ++eq) if((c = tag.charCodeAt(eq)) === 32 || c === 10 || c === 13) break;
-	if(!skip_root) z[0] = tag.slice(0, eq);
-	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);
-		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;
-		quot = ((eq=cc.charCodeAt(c+1)) == 34 || eq == 39) ? 1 : 0;
-		v = cc.slice(c+1+quot, cc.length-quot);
-		if(q.indexOf("_") > 0) q = q.slice(0, q.indexOf("_")); // from ods
-		z[q] = v;
-		if(!skip_LC) z[q.toLowerCase()] = v;
-	}
-	return z;
-}
 function strip_ns(x/*:string*/)/*:string*/ { return x.replace(nsregex2, "<$1"); }

 var encodings = {
@ -67,7 +47,7 @@ var rencoding = /*#__PURE__*/evert(encodings);
 // TODO: CP remap (need to read file version to determine OS)
 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})_/g;
+	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*/ {
 		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));});
@ -181,6 +161,16 @@ 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', '·'],
@ -191,25 +181,30 @@ 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);
@ -250,8 +245,9 @@ 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
@ -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
@ -20,8 +20,7 @@ function recordhopper(data, cb/*:RecordHopperCB*/, opts/*:?any*/) {

 /* control buffer usage for fixed-length buffers */
 function buf_array()/*:BufArray*/ {
-	var bufs/*:Array<Block>*/ = [], blksz = has_buf ? 16384 : 2048;
-	var has_buf_copy = has_buf && (typeof new_buf(blksz).copy == "function");
+	var bufs/*:Array<Block>*/ = [], blksz = has_buf ? 256 : 2048;
 	var newblk = function ba_newblk(sz/*:number*/)/*:Block*/ {
 		var o/*:Block*/ = (new_buf(sz)/*:any*/);
 		prep_blob(o, 0);
@ -50,15 +49,10 @@ function buf_array()/*:BufArray*/ {
 		endbuf();
 		return bconcat(bufs);
 	};
-	var end2 = function() {
-		endbuf(); return bufs;
-	};

-	var push = function ba_push(buf) {
-		endbuf(); curbuf = buf; if(curbuf.l == null) curbuf.l = curbuf.length; next(blksz);
-	};
+	var push = function ba_push(buf) { endbuf(); curbuf = buf; if(curbuf.l == null) curbuf.l = curbuf.length; next(blksz); };

-	return ({ next:next, push:push, end:end, _bufs:bufs, end2:end2 }/*:any*/);
+	return ({ next:next, push:push, end:end, _bufs:bufs }/*:any*/);
 }

 function write_record(ba/*:BufArray*/, type/*:number*/, payload, length/*:?number*/) {
--- 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="";
@ -108,19 +110,11 @@ 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 || (dense ? ({"!data": []}) : ({}/*: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;
@ -128,71 +122,63 @@ 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;
-		if(dense) {
-			if(!ws["!data"][__R]) ws["!data"][__R] = [];
-			row = ws["!data"][__R];
-		}
-		var data_R = 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], t:"" }/*:any*/);
-			var __C = _C + C;
+		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 __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];
+			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]; }
+				if(Array.isArray(cell.v)) { cell.f = data[R][C][1]; cell.v = cell.v[0]; }
 				if(cell.v === null) {
 					if(cell.f) cell.t = 'n';
 					else if(o.nullError) { cell.t = 'e'; cell.v = 0; }
 					else if(!o.sheetStubs) continue;
 					else cell.t = 'z';
 				}
-				else if(typeof cell.v === 'number') {
-					if(isFinite(cell.v)) cell.t = 'n';
-					else if(isNaN(cell.v)) { cell.t = 'e'; cell.v = 0x0F; /* #VALUE! */ }
-					else { cell.t = 'e'; cell.v = 0x07; /*# DIV/0 */ }
-				}
+				else if(typeof cell.v === 'number') cell.t = 'n';
 				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); }
 				}
 				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) + (__R + 1)/*: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) {
+		if (range.s.c > _C) range.s.c = _C;
+		if (range.s.r > _R) range.s.r = _R;
+		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
@ -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 */
@ -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 = {
--- a/bits/31_rels.js
+++ b/bits/31_rels.js
@ -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
@ -1,5 +1,5 @@
 /* 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);
--- a/bits/38_xlstypes.js
+++ b/bits/38_xlstypes.js
@ -123,8 +123,8 @@ function parse_TypedPropertyValue(blob, type/*:number*/, _opts)/*:any*/ {
 		case 0x03 /*VT_I4*/: ret = blob.read_shift(4, 'i'); return ret;
 		case 0x0B /*VT_BOOL*/: return blob.read_shift(4) !== 0x0;
 		case 0x13 /*VT_UI4*/: ret = blob.read_shift(4); return ret;
-		case 0x1E /*VT_LPSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/(^|[^\u0000])\u0000+$/,"$1"); break;
-		case 0x1F /*VT_LPWSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/(^|[^\u0000])\u0000+$/,"$1"); break;
+		case 0x1E /*VT_LPSTR*/: return parse_lpstr(blob, t, 4).replace(chr0,'');
+		case 0x1F /*VT_LPWSTR*/: return parse_lpwstr(blob);
 		case 0x40 /*VT_FILETIME*/: return parse_FILETIME(blob);
 		case 0x41 /*VT_BLOB*/: return parse_BLOB(blob);
 		case 0x47 /*VT_CF*/: return parse_ClipboardData(blob);
@ -233,8 +233,8 @@ function parse_PropertySet(blob, PIDSI) {
 				/* [MS-OSHARED] 2.3.3.2.3.1.2 + PROPVARIANT */
 				switch(blob[blob.l]) {
 					case 0x41 /*VT_BLOB*/: blob.l += 4; val = parse_BLOB(blob); break;
-					case 0x1E /*VT_LPSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/(^|[^\u0000])\u0000+$/,"$1"); break;
-					case 0x1F /*VT_LPWSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/(^|[^\u0000])\u0000+$/,"$1"); break;
+					case 0x1E /*VT_LPSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]).replace(/\u0000+$/,""); 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;
--- 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;
@ -762,11 +696,9 @@ 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 +750,21 @@ 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 +1014,43 @@ 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 +1061,6 @@ 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 +1074,7 @@ 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 +1082,3 @@ 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 = (typeof $cptable !== "undefined" ? $cptable.utils.decode(current_cp, d.slice(d.l, d.l+ww)) : a2s(d.slice(d.l, d.l + ww))).replace(/[\u0000\r\n].*$/g,"");
 		d.l += ww;
 		field.type = String.fromCharCode(d.read_shift(1));
 		if(ft != 0x02 && !l7) field.offset = d.read_shift(4);
@ -176,13 +177,10 @@ function dbf_to_aoa(buf, opts)/*:AOA*/ {
 			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; }
@ -246,15 +239,14 @@ function dbf_to_workbook(buf, opts)/*:Workbook*/ {
 		var o = sheet_to_workbook(dbf_to_sheet(buf, opts), opts);
 		o.bookType = "dbf";
 		return o;
-	} catch(e) { if(opts && opts.WTF) throw e; }
+	}
+	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 +282,7 @@ 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 +308,11 @@ 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 +341,6 @@ 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 +352,13 @@ 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();
 }
@ -404,21 +385,16 @@ 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 */
 	function sylk_to_aoa(d/*:RawData*/, opts)/*:[AOA, Worksheet]*/ {
 		switch(opts.type) {
@ -471,9 +447,8 @@ var SYLK = /*#__PURE__*/(function() {
 			// 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 = "";
 			for(rj=1; rj<record.length; ++rj) switch(record[rj].charAt(0)) {
-				case 'A': cmnt = record[rj].slice(1); break; // TODO: comment
+				case 'A': break; // TODO: comment
 				case 'X': C = parseInt(record[rj].slice(1), 10)-1; C_seen_X = true; break;
 				case 'Y':
 					R = parseInt(record[rj].slice(1), 10)-1; if(!C_seen_X) C = 0;
@ -483,12 +458,12 @@ var SYLK = /*#__PURE__*/(function() {
 					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]; }
 					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";
-						}
+						if(next_cell_format !== null && fmt_is_date(next_cell_format) && opts.cellDates) { val = numdate(wb.Workbook.WBProps.date1904 ? val + 1462 : val); cell_t = "d"; }
+					} else if(!isNaN(fuzzydate(val).getDate())) {
+						val = parseDate(val); cell_t = "d";
+						if(!opts.cellDates) { cell_t = "n"; val = datenum(val, wb.Workbook.WBProps.date1904); }
 					}
 					if(typeof $cptable !== 'undefined' && typeof val == "string" && ((opts||{}).type != "string") && (opts||{}).codepage) val = $cptable.utils.decode(opts.codepage, val);
 					C_seen_K = true;
@ -524,10 +499,6 @@ var SYLK = /*#__PURE__*/(function() {
 				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}];
-			}
 			break;
 			case 'F': /* Format */
 			var F_seen = 0;
@ -589,27 +560,20 @@ var SYLK = /*#__PURE__*/(function() {
 		return outwb;
 	}

-	function write_ws_cell_sylk(cell/*:Cell*/, ws/*:Worksheet*/, R/*:number*/, C/*:number*/, opts, date1904/*:boolean*/)/*:string*/ {
+	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 += isFinite(cell.v) ? (cell.v||0) : BErr[isNaN(cell.v) ? 0x24 : 0x07];
+				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) + " ";
@ -634,52 +598,29 @@ 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;
+		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("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;
+		for(var R = r.s.r; R <= r.e.r; ++R) {
+			var p = [];
+			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;
+				p.push(write_ws_cell_sylk(cell, ws, R, C, opts)); // TODO: pass date1904 info
+			}
+			o.push(p.join(RS));
+		}
 		return preamble.join(RS) + RS + o.join(RS) + RS + "E" + RS;
 	}

@ -719,10 +660,7 @@ 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:
@ -745,56 +683,62 @@ var DIF = /*#__PURE__*/(function() {
 		return o;
 	}

-	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,
@ -822,7 +766,7 @@ var ETH = /*#__PURE__*/(function() {
 				case 'vtc':
 					switch(record[3]) {
 						case 'nl': arr[R][C] = +record[4] ? true : false; break;
-						default: arr[R][C] = record[record.length-1].charAt(0) == "#" ? ({t: "e", v: RBErr[record[record.length-1]] }) : +record[4]; break;
+						default: arr[R][C] = +record[4]; break;
 					}
 					if(record[2] == 'vtf') arr[R][C] = [arr[R][C], _f];
 			}
@ -857,15 +801,19 @@ 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) {
-					case 's': oo.push(encode(cell.v)); break;
+					case 's': case 'str': oo.push(encode(cell.v)); break;
+					case 'n':
+						if(!cell.f) { oo[2]='v'; oo[3]=cell.v; }
+						else { oo[2]='vtf'; oo[3]='n'; oo[4]=cell.v; oo[5]=encode(cell.f); }
+						break;
 					case 'b':
 						oo[2] = 'vt'+(cell.f?'f':'c'); oo[3]='nl'; oo[4]=cell.v?"1":"0";
 						oo[5] = encode(cell.f||(cell.v?'TRUE':'FALSE'));
@ -875,19 +823,6 @@ var ETH = /*#__PURE__*/(function() {
 						oo[2] = 'vtc'; oo[3] = 'nd'; oo[4] = ""+t;
 						oo[5] = cell.w || SSF_format(cell.z || table_fmt[14], t);
 						break;
-					case 'n':
-						if(isFinite(cell.v)) {
-							if(!cell.f) { oo[2]='v'; oo[3]=cell.v; }
-							else { oo[2]='vtf'; oo[3]='n'; oo[4]=cell.v; oo[5]=encode(cell.f); }
-						} else {
-							oo[2] = 'vt' + (cell.f ? 'f' : 'c');
-							oo[3] = "e" + BErr[isNaN(cell.v) ? 0x24 : 0x07];
-							oo[4] = "0";
-							oo[5] = cell.f || oo[3].slice(1);
-							oo[6] = "e";
-							oo[7] = oo[3].slice(1);
-						}
-						break;
 					case 'e': continue;
 				}
 				o.push(oo.join(":"));
@ -919,7 +854,6 @@ var PRN = /*#__PURE__*/(function() {
 		else if(data === 'FALSE') arr[R][C] = false;
 		else if(!isNaN(fuzzynum(data))) arr[R][C] = fuzzynum(data);
 		else if(!isNaN(fuzzydate(data).getDate())) arr[R][C] = parseDate(data);
-		else if(data.charCodeAt(0) == 35 /* # */ && RBErr[data] != null) arr[R][C] = ({ t: 'e', v: RBErr[data], w: data });
 		else arr[R][C] = data;
 	}

@ -951,18 +885,18 @@ 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) {
@ -993,8 +927,7 @@ 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=") {
@ -1014,37 +947,33 @@ var PRN = /*#__PURE__*/(function() {
 		var start = 0, end = 0, sepcc = sep.charCodeAt(0), instr = false, cc=0, startcc=str.charCodeAt(0);
 		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 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 = fuzzynum(s))) { cell.t = 'n'; if(o.cellText !== false) cell.w = s; cell.v = v; }
 			else if(!isNaN((v = 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);
+				var k = 0;
+				if(_re && s.match(_re)){ s=dateNF_fix(s, o.dateNF, (s.match(_re)||[])); k=1; v = parseDate(s, k); }
 				if(o.cellDates) { cell.t = 'd'; cell.v = v; }
 				else { cell.t = 'n'; cell.v = datenum(v); }
+				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 if(s.charCodeAt(0) == 35 /* # */ && RBErr[s] != null) {
-				cell.t = 'e'; cell.w = s; cell.v = RBErr[s];
 			} 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;
@ -1099,14 +1028,13 @@ 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 += " ";
@ -1133,7 +1061,7 @@ 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
@ -24,33 +24,15 @@ 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) {
@ -82,9 +64,9 @@ var WK_ = /*#__PURE__*/(function() {
 				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 +74,26 @@ 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;
@ -143,14 +115,14 @@ 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 +156,25 @@ 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 +200,7 @@ 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 +208,7 @@ 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") {
@ -343,18 +308,11 @@ 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');
@ -396,12 +354,12 @@ var WK_ = /*#__PURE__*/(function() {
 		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 +368,12 @@ 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;
 	}

@ -468,7 +426,7 @@ var WK_ = /*#__PURE__*/(function() {
 		0x33: ["FALSE", 0],
 		0x34: ["TRUE", 0],
 		0x35: ["RAND", 0],
-		0x36: ["DATE", 3],
+		// 0x36 DATE
 		// 0x37 NOW
 		// 0x38 PMT
 		// 0x39 PV
@ -478,7 +436,7 @@ var WK_ = /*#__PURE__*/(function() {
 		// 0x3D MONTH
 		// 0x3E YEAR
 		0x3F: ["ROUND", 2],
-		0x40: ["TIME", 3],
+		// 0x40 TIME
 		// 0x41 HOUR
 		// 0x42 MINUTE
 		// 0x43 SECOND
@ -598,6 +556,7 @@ var WK_ = /*#__PURE__*/(function() {
 		else console.error("WK1 bad formula parse |" + out.join("|") + "|");
 	}

+
 	function parse_cell_3(blob/*::, length*/) {
 		var o = [{c:0,r:0}, {t:'n',v:0}, 0];
 		o[0].r = blob.read_shift(2); o[3] = blob[blob.l++]; o[0].c = blob[blob.l++];
@ -762,251 +721,209 @@ 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_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" },
+		/*::[*/0x0066/*::]*/: { n:"PRANGES??" },
+		/*::[*/0x0067/*::]*/: { n:"RRANGES??" },
+		/*::[*/0x0068/*::]*/: { n:"FNAME??" },
+		/*::[*/0x0069/*::]*/: { n:"MRANGES??" },
+		/*::[*/0x00CC/*::]*/: { n:"SHEETNAMECS", f:parse_SHEETNAMECS },
+		/*::[*/0x00DE/*::]*/: { n:"SHEETNAMELP", f:parse_SHEETNAMELP },
+		/*::[*/0x00FF/*::]*/: { n:"BOF", f:parseuint16 },
+		/*::[*/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 s/*:Worksheet*/ = ((o.dense ? [] : {})/*:any*/);
 		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);
@ -1017,22 +934,6 @@ var WK_ = /*#__PURE__*/(function() {
 					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;
@ -1055,7 +956,7 @@ var WK_ = /*#__PURE__*/(function() {

 				case 0x0601: { /* BOS */
 					var sidx = p.read_shift(2);
-					s = ({}/*:any*/); if(o.dense) s["!data"] = [];
+					s = ((o.dense ? [] : {})/*:any*/);
 					range.s.c = p.read_shift(2);
 					range.e.c = p.read_shift(2);
 					range.s.r = p.read_shift(4);
@ -1092,28 +993,20 @@ var WK_ = /*#__PURE__*/(function() {
 					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 flags = p.read_shift(1);
+						if(flags & 0x80) p.l += 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;
+							case 8: cell = { t: "n", v: p.read_shift(8, 'f') }; p.l += 2; /* cell.f = formulae[p.read_shift(4)]; */ p.l += 4; 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;
@ -1122,14 +1015,10 @@ var WK_ = /*#__PURE__*/(function() {
 							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;
+							if(Array.isArray(s)) {
+								if(!s[R]) s[R] = [];
+								s[R][C] = cell;
+							} else s[encode_cell({r:R, c:C})] = cell;
 						}
 						++R; --cnt;
 						while(mul-- > 0 && cnt >= 0) {
@ -1144,29 +1033,17 @@ var WK_ = /*#__PURE__*/(function() {
 								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;
+								if(Array.isArray(s)) {
+									if(!s[R]) s[R] = [];
+									s[R][C] = cell;
+								} else s[encode_cell({r:R, c:C})] = 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;
--- 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 = {};
@ -183,7 +185,7 @@ function parse_si(x, opts) {
 	/* 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,"")), true);
 		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
@ -13,18 +13,14 @@ function rtf_to_sheet(d, opts) {
 }
 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");
+  var ws = o.dense ? [] : {};
+  var rows = str.match(/\\trowd[\s\S]*?\\row\b/g);
  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] = [];
+    if (Array.isArray(ws))
+      ws[R] = [];
    var rtfre = /\\[\w\-]+\b/g;
    var last_index = 0;
    var res;
@ -49,13 +45,9 @@ function rtf_to_sheet_str(str, opts) {
              if (o.cellText !== false)
                cell.w = cell.v;
              cell.v = fuzzynum(cell.v);
-            } else if (RBErr[cell.v] != null) {
-              cell.t = "e";
-              cell.w = cell.v;
-              cell.v = RBErr[cell.v];
            }
-            if (dense)
-              row[C] = cell;
+            if (Array.isArray(ws))
+              ws[R][C] = cell;
            else
              ws[encode_cell({ r: R, c: C })] = cell;
          }
@ -83,17 +75,15 @@ function sheet_to_rtf(ws, opts) {
  if (!ws["!ref"])
    return o[0] + "}";
  var r = safe_decode_range(ws["!ref"]), cell;
-  var dense = ws["!data"] != null, row = [];
+  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");
-    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];
+      cell = dense ? (ws[R] || [])[C] : ws[coord];
      if (!cell || cell.v == null && (!cell.f || cell.F)) {
        o.push(" \\cell");
        continue;
--- 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;
@ -163,12 +163,10 @@ function parse_fonts(t, styles, themes, opts) {
 			/* 18.8.2  b CT_BooleanProperty */
 			case '<b': font.bold = y.val ? parsexmlbool(y.val) : 1; break;
 			case '<b/>': font.bold = 1; break;
-			case '</b>': case '</b': break;

 			/* 18.8.26 i CT_BooleanProperty */
 			case '<i': font.italic = y.val ? parsexmlbool(y.val) : 1; break;
 			case '<i/>': font.italic = 1; break;
-			case '</i>': case '</i': break;

 			/* 18.4.13 u CT_UnderlineProperty */
 			case '<u':
@ -180,55 +178,48 @@ function parse_fonts(t, styles, themes, opts) {
 					case "doubleAccounting": font.underline = 0x22; break;
 				} break;
 			case '<u/>': font.underline = 1; break;
-			case '</u>': case '</u': break;

 			/* 18.4.10 strike CT_BooleanProperty */
 			case '<strike': font.strike = y.val ? parsexmlbool(y.val) : 1; break;
 			case '<strike/>': font.strike = 1; break;
-			case '</strike>': case '</strike': break;

 			/* 18.4.2  outline CT_BooleanProperty */
 			case '<outline': font.outline = y.val ? parsexmlbool(y.val) : 1; break;
 			case '<outline/>': font.outline = 1; break;
-			case '</outline>': case '</outline': break;

 			/* 18.8.36 shadow CT_BooleanProperty */
 			case '<shadow': font.shadow = y.val ? parsexmlbool(y.val) : 1; break;
 			case '<shadow/>': font.shadow = 1; break;
-			case '</shadow>': case '</shadow': break;

 			/* 18.8.12 condense CT_BooleanProperty */
 			case '<condense': font.condense = y.val ? parsexmlbool(y.val) : 1; break;
 			case '<condense/>': font.condense = 1; break;
-			case '</condense>': case '</condense': break;

 			/* 18.8.17 extend CT_BooleanProperty */
 			case '<extend': font.extend = y.val ? parsexmlbool(y.val) : 1; break;
 			case '<extend/>': font.extend = 1; break;
-			case '</extend>': case '</extend': break;

 			/* 18.4.11 sz CT_FontSize */
 			case '<sz': if(y.val) font.sz = +y.val; break;
-			case '<sz/>': case '</sz>': case '</sz': break;
+			case '<sz/>': case '</sz>': break;

 			/* 18.4.14 vertAlign CT_VerticalAlignFontProperty */
 			case '<vertAlign': if(y.val) font.vertAlign = y.val; break;
-			case '<vertAlign/>': case '</vertAlign>': case '</vertAlign': break;
+			case '<vertAlign/>': case '</vertAlign>': break;

 			/* 18.8.18 family CT_FontFamily */
 			case '<family': if(y.val) font.family = parseInt(y.val,10); break;
-			case '<family/>': case '</family>': case '</family': break;
+			case '<family/>': case '</family>': break;

 			/* 18.8.35 scheme CT_FontScheme */
 			case '<scheme': if(y.val) font.scheme = y.val; break;
-			case '<scheme/>': case '</scheme>': case '</scheme': break;
+			case '<scheme/>': case '</scheme>': break;

 			/* 18.4.1 charset CT_IntProperty */
 			case '<charset':
 				if(y.val == '1') break;
 				y.codepage = CS2CP[parseInt(y.val, 10)];
 				break;
-			case '<charset/>': case '</charset>': case '</charset': break;

 			/* 18.?.? color CT_Color */
 			case '<color':
@ -251,11 +242,11 @@ function parse_fonts(t, styles, themes, opts) {
 				}

 				break;
-			case '<color/>': case '</color>': case '</color': break;
+			case '<color/>': case '</color>': break;

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

 			/* 18.2.10 extLst CT_ExtensionList ? */
 			case '<extLst': case '<extLst>': case '</extLst>': break;
@ -273,7 +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]);
@ -314,13 +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]])
@ -334,7 +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;
@ -346,12 +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 ? */
@ -379,31 +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/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
@ -1,42 +1,5 @@
 /* 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) {
+function write_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(",");
@ -58,7 +21,7 @@ function write_vml(rId/*:number*/, comments, ws) {
 	return o.join("");
 }

-function write_vml_comment(x, _shapeid, ws)/*:string*/ {
+function write_vml_comment(x, _shapeid)/*:string*/ {
 	var c = decode_cell(x[0]);
 	var fillopts = /*::(*/{'color2':"#BEFF82", 'type':"gradient"}/*:: :any)*/;
 	if(fillopts.type == "gradient") fillopts.angle = "-180";
--- 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
@ -23,10 +23,7 @@ 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) {
--- 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 */
--- 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) {
@ -262,7 +263,7 @@ function write_XLSBFormulaRangeWS(_str, wb) {
 	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 parts = _str.split(":"); str = parts[0];

 	var out = new_buf(27);
 	out.write_shift(4, 19);
--- a/bits/65_fods.js
+++ b/bits/65_fods.js
@ -31,6 +31,6 @@ function ods_to_csf_3D(r/*:string*/)/*:[string, string]*/ {
 }

 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
@ -81,7 +81,7 @@ 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; }
@ -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);
@ -62,7 +65,7 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	var merges/*:Array<Range>*/ = [];
 	var _merge = data2.match(mergecregex);
 	if(_merge) for(ridx = 0; ridx != _merge.length; ++ridx)
-		merges[ridx] = safe_decode_range(_merge[ridx].slice(_merge[ridx].indexOf("=")+2));
+		merges[ridx] = safe_decode_range(_merge[ridx].slice(_merge[ridx].indexOf("\"")+1));

 	/* 18.3.1.48 hyperlinks CT_Hyperlinks */
 	var hlink = data2.match(hlinkregex);
@ -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;
@ -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][^>]*)?\/?>/g;
 function parse_ws_xml_sheetviews(data, wb/*:WBWBProps*/) {
 	if(!wb.Views) wb.Views = [{}];
 	(data.match(sviewregex)||[]).forEach(function(r/*:string*/, i/*:number*/) {
@ -259,27 +256,21 @@ 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 "";
 	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;
@ -308,20 +299,18 @@ function write_ws_xml_cell(cell/*:Cell*/, ref, ws, opts, idx, wb, date1904)/*:st
 		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;
@ -361,10 +349,8 @@ 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;
@ -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]), 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];
 					}
-				} 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);
 				}
@ -468,7 +446,7 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 					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;
 		}
 	}
@ -521,19 +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, data = dense ? ws["!data"] : [];
+	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);
-		var data_R = dense ? data[R] : [];
 		for(C = range.s.c; C <= range.e.c; ++C) {
 			ref = cols[C] + rr;
-			var _cell = dense ? 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*/);
@ -634,12 +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' */
@ -805,12 +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*/ {
+function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:number*/, opts, ws/*:Worksheet*/, last_seen/*:boolean*/)/*:boolean*/ {
 	var o/*:any*/ = ({r:R, c:C}/*:any*/);
 	if(cell.c) ws['!comments'].push([encode_cell(o), cell.c]);
 	if(cell.v === undefined) return false;
@ -820,7 +812,7 @@ 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;
@ -832,7 +824,7 @@ function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:num
 	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));
@ -847,15 +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(!isFinite(cell.v)) {
-				o.t = "e";
-				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(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));
@ -876,28 +859,26 @@ 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*/) {
-	var range = safe_decode_range(ws['!ref'] || "A1"), rr = "", cols/*:Array<string>*/ = [];
-	var date1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;
+function write_CELLTABLE(ba, ws/*:Worksheet*/, idx/*:number*/, opts/*::, wb:Workbook*/) {
+	var range = safe_decode_range(ws['!ref'] || "A1"), ref, rr = "", cols/*:Array<string>*/ = [];
 	write_record(ba, 0x0091 /* BrtBeginSheetData */);
-	var dense = ws["!data"] != null, row = dense ? ws["!data"][range.s.r] : [];
+	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) {
 		rr = encode_row(R);
-		if(dense) row = ws["!data"][R];
 		/* [ACCELLTABLE] */
 		/* BrtRowHdr */
 		write_row_header(ba, ws, range, R);
-		if(dense && !row) continue;
 		var last_seen = false;
 		if(R <= range.e.r) for(var C = range.s.c; C <= range.e.c; ++C) {
 			/* *16384CELL */
 			if(R === range.s.r) cols[C] = encode_col(C);
-			var cell = dense ? row[C] : ws[cols[C] + rr];
+			ref = cols[C] + rr;
+			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 */);
@ -928,7 +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'];
--- 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/71_wbcommon.js
+++ b/bits/71_wbcommon.js
@ -115,17 +115,14 @@ function safe1904(wb/*:Workbook*/)/*:string*/ {

 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) {
--- a/bits/73_wbbin.js
+++ b/bits/73_wbbin.js
@ -69,14 +69,8 @@ function parse_BrtName(data, length, opts) {
 	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); }
+	var formula = parse_XLSBNameParsedFormula(data, 0, opts);
+	var comment = parse_XLNullableWideString(data);
 	if(flags & 0x20) name = "_xlnm." + name;
 	//if(0 /* fProc */) {
 		// unusedstring1: XLNullableWideString
@ -147,7 +141,7 @@ 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);
--- 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);
@ -207,7 +207,7 @@ 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 +222,7 @@ 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'*/:
@ -232,7 +232,7 @@ 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'*/:
@ -240,8 +240,8 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 				if(comments.length > 0) cell.c = comments;
 				if((!opts.sheetRows || opts.sheetRows > r) && cell.v !== void 0) {
 					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) {
@ -261,8 +261,8 @@ 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 +321,7 @@ 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 = [];
@ -443,7 +443,6 @@ 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 +534,6 @@ 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;
@ -1106,15 +1102,11 @@ 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*/{
@ -1144,13 +1136,7 @@ function write_ws_xlml_cell(cell, ref/*:string*/, ws, opts, idx/*:number*/, wb,
 	var t = "", p = "";
 	switch(cell.t) {
 		case 'z': if(!opts.sheetStubs) return ""; break;
-		case 'n': {
-			if(!isFinite(cell.v)) {
-				t = 'Error'; p = BErr[isNaN(cell.v) ? 0x24 : 0x07];
-			} else {
-				t = 'Number'; p = String(cell.v);
-			}
-		} break;
+		case 'n': t = 'Number'; p = String(cell.v); break;
 		case 'b': t = 'Boolean'; p = (cell.v ? "1" : "0"); break;
 		case 'e': t = 'Error'; p = BErr[cell.v]; break;
 		case 'd': t = 'DateTime'; p = new Date(cell.v).toISOString(); if(cell.z == null) cell.z = cell.z || table_fmt[14]; break;
@ -1191,13 +1177,10 @@ 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 addr = {r:0,c:0};
+	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])];
-		addr.r = R;
 		for(var C = range.s.c; C <= range.e.c; ++C) {
-			addr.c = C;
 			var skip = false;
 			for(mi = 0; mi != marr.length; ++mi) {
 				if(marr[mi].s.c > C) continue;
@ -1208,7 +1191,8 @@ function write_ws_xlml_table(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbo
 				break;
 			}
 			if(skip) continue;
-			var ref = encode_col(C) + encode_row(R), cell = dense ? (ws["!data"][R]||[])[C] : ws[ref];
+			var addr = {r:R,c:C};
+			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>");
@ -1231,7 +1215,7 @@ function write_ws_xlml(idx/*:number*/, opts, wb/*:Workbook*/)/*:string*/ {
 	/* WorksheetOptions */
 	o.push(write_ws_xlml_wsopts(ws, opts, idx, wb));

-	if(ws && 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>');
+	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("");
 }
@ -1250,10 +1234,11 @@ function write_xlml(wb, opts)/*:string*/ {
 	d.push(write_props_xlml(wb, opts));
 	d.push(write_wb_xlml(wb, opts));
 	d.push("");
-	d.push(write_names_xlml(wb, opts));
+	d.push("");
 	for(var i = 0; i < wb.SheetNames.length; ++i)
 		d.push(writextag("Worksheet", write_ws_xlml(i, opts, wb), {"ss:Name":escapexml(wb.SheetNames[i])}));
 	d[2] = write_sty_xlml(wb, opts);
+	d[3] = write_names_xlml(wb, opts);
 	return XML_HEADER + writextag("Workbook", d.join(""), {
 		'xmlns':      XLMLNS.ss,
 		'xmlns:o':    XLMLNS.o,
--- a/bits/76_xls.js
+++ b/bits/76_xls.js
@ -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;
 		}
 	};
@ -266,7 +265,6 @@ 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 +299,11 @@ 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 +324,31 @@ 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 +367,21 @@ 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 +389,7 @@ 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 +404,10 @@ 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 +420,7 @@ 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 +429,7 @@ 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 +443,7 @@ 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 +451,13 @@ 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 +465,7 @@ 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 +474,7 @@ 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;
@ -490,7 +486,7 @@ 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);
@ -512,24 +508,25 @@ 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 +536,7 @@ 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;
@ -627,14 +619,14 @@ function parse_xls_props(cfb/*:CFBContainer*/, props, o) {
 	if(DSI && DSI.size > 0) try {
 		var DocSummary = parse_PropertySetStream(DSI, DocSummaryPIDDSI, PSCLSID.DSI);
 		for(var d in DocSummary) props[d] = DocSummary[d];
-	} catch(e) {if(o.WTF) console.error(e && e.message || e);}
+	} catch(e) {if(o.WTF) throw e;/* empty */}

 	/* [MS-OSHARED] 2.3.3.2.1 Summary Information Property Set*/
 	var SI = CFB.find(cfb, '/!SummaryInformation');
 	if(SI && SI.size > 0) try {
 		var Summary = parse_PropertySetStream(SI, SummaryPIDSI, PSCLSID.SI);
 		for(var s in Summary) if(props[s] == null) props[s] = Summary[s];
-	} catch(e) {if(o.WTF) console.error(e && e.message || e);}
+	} catch(e) {if(o.WTF) throw e;/* empty */}

 	if(props.HeadingPairs && props.TitlesOfParts) {
 		load_props_pairs(props.HeadingPairs, props.TitlesOfParts, props, o);
--- 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.r, 0x3FFF);
+		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));
@ -509,15 +207,15 @@ 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");
 	var MAX_ROWS = b8 ? 65536 : 16384;
 	if(range.e.c > 0xFF || range.e.r >= MAX_ROWS) {
-		if(opts.WTF) throw new Error("Range " + (ws['!ref'] || "A1") + " exceeds format limit A1:IV" + MAX_ROWS);
+		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.r, MAX_ROWS-1);
+		range.e.r = Math.min(range.e.c, MAX_ROWS-1);
 	}

 	write_biff_rec(ba, 0x0809, write_BOF(wb, 0x10, opts));
@ -543,26 +241,24 @@ function write_ws_biff8(idx/*:number*/, opts, wb/*:Workbook*/) {
 	write_biff_rec(ba, 0x0200 /* Dimensions */, 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) {
-			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_biff8_cell(ba, cell, R, C, opts, date1904);
-			if(b8 && cell.l) ws['!links'].push([cols[C] + rr, cell.l]);
-			if(cell.c) comments.push([cell.c, R, C]);
+			write_ws_biff8_cell(ba, cell, R, C, opts);
+			if(b8 && cell.l) ws['!links'].push([ref, cell.l]);
+			if(b8 && cell.c) comments.push([ref, cell.c]);
 		}
 	}
 	var cname/*:string*/ = _sheet.CodeName || _sheet.name || s;
 	/* ... */
-	if(b8) write_comments_biff8(ba, comments); else write_comments_biff2(ba, comments);
+	// if(b8) comments.forEach(function(comment) { write_biff_rec(ba, 0x001c /* Note */, write_NoteSh(comment)); });
 	/* ... */
 	if(b8) write_biff_rec(ba, 0x023e /* Window2 */, write_Window2((_WB.Views||[])[0]));
 	/* ... */
@ -632,10 +328,8 @@ 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 */
+	/* *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));

@ -678,7 +372,6 @@ 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);

@ -700,9 +393,6 @@ function write_biff_buf(wb/*:Workbook*/, opts/*:WriteOpts*/) {
 		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(range.e.r > 65535) {
-			if(typeof console != "undefined" && console.error) console.error("Worksheet '" + wb.SheetNames[i] + "' extends beyond row 65536.  Data may be lost.");
-		}
 	}

 	var o = opts || {};
--- 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>*/ = [];
@ -45,14 +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];
-			} else if(m.charCodeAt(0) == 35 /* # */ && RBErr[m] != null) {
-				o.t = 'e'; o.w = m; o.v = RBErr[m];
 			}
-			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;
 		}
@ -65,7 +61,6 @@ function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o/*:Sheet2HT
 	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) {
@ -75,12 +70,8 @@ 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];
-		if(cell && cell.t == 'n' && cell.v != null && !isFinite(cell.v)) {
-			if(isNaN(cell.v)) cell = ({t:'e', v:0x24, w:BErr[0x24]});
-			else cell = ({t:'e', v:0x07, w:BErr[0x07]});
-		}
+		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*/);
@ -89,11 +80,9 @@ function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o/*:Sheet2HT
 		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.f != null) sp["data-f"] = escapehtml(cell.f);
-			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));
@ -106,7 +95,7 @@ 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);
@ -129,9 +118,10 @@ 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("");
 }
@ -144,7 +134,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 	}

 	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;
@ -180,7 +170,6 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 			if (opts.display && is_dom_element_hidden(elt)) continue;
 			var v/*:?string*/ = elt.hasAttribute('data-v') ? elt.getAttribute('data-v') : elt.hasAttribute('v') ? elt.getAttribute('v') : htmldecode(elt.innerHTML);
 			var z/*:?string*/ = elt.getAttribute('data-z') || elt.getAttribute('z');
-			var f/*:?string*/ = elt.hasAttribute('data-f') ? elt.getAttribute('data-f') : elt.hasAttribute('f') ? elt.getAttribute('f') : null;
 			for(midx = 0; midx < merges.length; ++midx) {
 				var m/*:Range*/ = merges[midx];
 				if(m.s.c == C + or_C && m.s.r < R + or_R && R + or_R <= m.e.r) { C = m.e.c+1 - or_C; midx = -1; }
@ -193,16 +182,14 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 			if(v != null) {
 				if(v.length == 0) o.t = _t || 'z';
 				else if(opts.raw || v.trim().length == 0 || _t == "s"){}
-				else if(_t == "e" && BErr[+v]) o = {t:'e', v:+v, w: BErr[+v]};
 				else if(v === 'TRUE') o = {t:'b', v:true};
 				else if(v === 'FALSE') o = {t:'b', v:false};
 				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];
-				} else if(v.charCodeAt(0) == 35 /* # */ && RBErr[v] != null) o = ({t:'e', v: RBErr[v], w: v});
+				}
 			}
 			if(o.z === undefined && z != null) o.z = z;
 			/* The first link is used.  Links are assumed to be fully specified.
@ -212,8 +199,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 				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(f != null) o.f = f;
-			if(dense) { if(!ws["!data"][R + or_R]) ws["!data"][R + or_R] = []; ws["!data"][R + or_R][C + or_C] = o; }
+			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;
@ -229,7 +215,7 @@ 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);
 }

--- a/bits/80_parseods.js
+++ b/bits/80_parseods.js
@ -5,9 +5,9 @@ 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];
 }
@ -17,10 +17,10 @@ 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, "<!--", "-->"));
+	str = str.replace(/<!--([\s\S]*?)-->/mg,"").replace(/<!DOCTYPE[^\[]*\[[^\]]*\]>/gm,"");
 	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]*$/,""))) {
+		switch((Rn[3]=Rn[3].replace(/_.*$/,""))) {
 		/* Number Format Definitions */
 		case 'number-style': // <number:number-style> 16.29.2
 		case 'currency-style': // <number:currency-style> 16.29.8
@ -245,27 +245,28 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 		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*/), ctag2 = ({}/*:any*/);
-		var textp = "", textpidx = 0, textptag/*:: = {}*/, oldtextp = "", oldtextpidx = 0;
-		var textR = [], oldtextR = [];
+		var ctag = ({value:""}/*:any*/);
+		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 = {}, tstyles = {};
+		var number_format_map = _nfm || {}, styles = {};
 		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:{}, Sheets:[]};
+		var WB = {Names:[], WBProps:{}};
 		var atag = ({}/*:any*/);
 		var _Ref/*:[string, string]*/ = ["", ""];
 		var comments/*:Array<Comment>*/ = [], comment/*:Comment*/ = ({}/*:any*/);
 		var creator = "", creatoridx = 0;
 		var isstub = false, intable = false;
 		var i = 0;
+		var baddate = 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]==='/') {
@ -282,17 +283,13 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					if(typeof JSON !== 'undefined') JSON.stringify(sheetag);
 					SheetNames.push(sheetag.name);
 					Sheets[sheetag.name] = ws;
-					WB.Sheets.push({
-						/* TODO: CodeName */
-						Hidden: (tstyles[sheetag["style-name"]] && tstyles[sheetag["style-name"]]["display"] ? (parsexmlbool(tstyles[sheetag["style-name"]]["display"]) ? 0 : 1) : 0)
-					});
 					intable = false;
 				}
 				else if(Rn[0].charAt(Rn[0].length-2) !== '/') {
 					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;
 				}
@ -310,18 +307,10 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 				if(rowpeat < 10) for(i = 0; i < rowpeat; ++i) if(row_ol > 0) rowinfo[R + i] = {level: row_ol};
 				C = -1; break;
 			case 'covered-table-cell': // 9.1.5 <table:covered-table-cell>
-				if(Rn[1] !== '/') {
-					++C;
-					ctag = parsexmltag(Rn[0], false);
-					colpeat = parseInt(ctag['number-columns-repeated']||"1",10) || 1;
-					if(opts.sheetStubs) {
-						while(colpeat-- > 0) {
-							if(opts.dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = {t:'z'}; }
-							else ws[encode_cell({r:R,c:C})] = {t:'z'};
-							++C;
-						} --C;
-					}
-					else C += colpeat - 1;
+				if(Rn[1] !== '/') ++C;
+				if(opts.sheetStubs) {
+					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 = [];
 				break; /* stub */
@ -329,23 +318,23 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 				if(Rn[0].charAt(Rn[0].length-2) === '/') {
 					++C;
 					ctag = parsexmltag(Rn[0], false);
-					colpeat = parseInt(ctag['number-columns-repeated']||"1", 10)||1;
+					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;
@ -353,7 +342,6 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					if(R < range.s.r) range.s.r = R;
 					if(rptR > range.e.r) range.e.r = rptR;
 					ctag = parsexmltag(Rn[0], false);
-					ctag2 = parsexmltagraw(Rn[0], true);
 					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"]];
@ -373,34 +361,28 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 									q.F = arrayf[i][1];
 					}
 					if(ctag['number-columns-spanned'] || ctag['number-rows-spanned']) {
-						mR = parseInt(ctag['number-rows-spanned']||"1",10) || 1;
-						mC = parseInt(ctag['number-columns-spanned']||"1",10) || 1;
-						if(mR * mC > 1) {
-							mrange = {s: {r:R,c:C}, e:{r:R + mR-1,c:C + mC-1}};
-							merges.push(mrange);
-						}
+						mR = parseInt(ctag['number-rows-spanned'],10) || 0;
+						mC = parseInt(ctag['number-columns-spanned'],10) || 0;
+						mrange = {s: {r:R,c:C}, e:{r:R + mR-1,c:C + mC-1}};
+						merges.push(mrange);
 					}

 					/* 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 '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); }
+						case 'date': q.t = 'd'; q.v = parseDate(ctag['date-value']);
+							if(!opts.cellDates) { q.t = 'n'; q.v = datenum(q.v, WB.WBProps.date1904) - baddate; }
 							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 '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(opts.cellDates) { q.t = 'd'; q.v = numdate(q.v); }
 							if(!q.z) q.z = 'HH:MM:SS'; break;
-						case 'number': q.t = 'n'; q.v = parseFloat(ctag['数据数值']);
-							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';
@ -409,9 +391,6 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					}
 				} else {
 					isstub = false;
-					if(ctag2['calcext:value-type'] == "error" && RBErr[textp] != null) {
-						q.t = 'e'; q.w = textp; q.v = RBErr[textp];
-					}
 					if(q.t === 's') {
 						q.v = textp || '';
 						if(textR.length) q.R = textR;
@ -426,9 +405,9 @@ 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);
@ -464,17 +443,10 @@ 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>
@ -533,16 +505,12 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			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"]];
-				else if(styletag["family"] == "table") tstyles[styletag["name"]] = styletag;
 			} break;
 			case 'map': break; // 16.3 <style:map>
 			case 'font-face': break; // 16.21 <style:font-face>

 			case 'paragraph-properties': break; // 17.6 <style:paragraph-properties>
-			case 'table-properties': { // 17.15 <style:table-properties>
-				var proptag = parsexmltag(Rn[0], false);
-				if(styletag && styletag.family == "table") styletag.display = proptag.display;
-			} break;
+			case 'table-properties': break; // 17.15 <style:table-properties>
 			case 'table-column-properties': break; // 17.16 <style:table-column-properties>
 			case 'table-row-properties': break; // 17.17 <style:table-row-properties>
 			case 'table-cell-properties': break; // 17.18 <style:table-cell-properties>
@ -604,7 +572,9 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			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;
+					case "1904-01-01": WB.WBProps.date1904 = true;
+					/* falls through */
+					case "1900-01-01": baddate = 0;
 				}
 				break;

@ -626,9 +596,6 @@ 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>
@ -658,13 +625,10 @@ 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:
@ -814,3 +778,4 @@ function parse_fods(data/*:string*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 	wb.bookType = "fods";
 	return wb;
 }
+
--- a/bits/81_writeods.js
+++ b/bits/81_writeods.js
@ -67,7 +67,7 @@ function write_number_format_ods(nf/*:string*/, nfidx/*:string*/)/*:string*/ {
 		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; }
+		if((t=nf.match(/(\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;
@ -99,9 +99,7 @@ function write_number_format_ods(nf/*:string*/, nfidx/*:string*/)/*:string*/ {
 					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;
+				case '/': payload += '<number:text>' + escapexml(c) + '</number:text>'; break;
 				default: console.error("unrecognized character " + c + " in ODF format " + nf);
 			}
 			if(!has_time) break j;
@ -128,7 +126,7 @@ function write_number_format_ods(nf/*:string*/, nfidx/*:string*/)/*:string*/ {
 					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 '/': 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; }
@ -184,42 +182,36 @@ function write_number_format_ods(nf/*:string*/, nfidx/*:string*/)/*:string*/ {
 }

 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);
-	}
+	var scoped = Names.filter(function(name) { return name.Sheet == (idx == -1 ? null : idx); });
 	if(!scoped.length) return "";
 	return "      <table:named-expressions>\n" + scoped.map(function(name) {
-		var odsref =  (idx == -1 ? "$" : "") + csf_to_ods_3D(name.Ref);
+		var odsref =  csf_to_ods_3D(name.Ref);
 		return "        " + writextag("table:named-range", null, {
 			"table:name": name.Name,
 			"table:cell-range-address": odsref,
-			"table:base-cell-address": odsref.replace(/[\.][^\.]*$/, ".$A$1")
+			"table:base-cell-address": odsref.replace(/[\.]?[^\.]*$/, ".$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, nfs)/*:string*/ {
 		/* Section 9 Tables */
 		var o/*:Array<string>*/ = [];
-		var tstyle = "ta1";
-		if(((((wb||{}).Workbook||{}).Sheets||[])[i]||{}).Hidden) tstyle = "ta2";
-		o.push('      <table:table table:name="' + escapexml(wb.SheetNames[i]) + '" table:style-name="' + tstyle + '">\n');
+		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');
 		}
@ -244,8 +236,8 @@ 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) {
@ -264,35 +256,22 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 						ct['office:boolean-value'] = (cell.v ? 'true' : 'false');
 						break;
 					case 'n':
-						if(!isFinite(cell.v)) {
-							if(isNaN(cell.v)) {
-								textp = "#NUM!";
-								ct['table:formula'] = "of:=#NUM!";
-							} else {
-								textp = "#DIV/0!";
-								ct['table:formula'] = "of:=" + (cell.v < 0 ? "-" : "") + "1/0";
-							}
-							ct['office:string-value'] = "";
-							ct['office:value-type'] = "string";
-							ct['calcext:value-type'] = "error";
-						} else {
-							textp = (cell.w||String(cell.v||0));
-							ct['office:value-type'] = "float";
-							ct['office:value'] = (cell.v||0);
-						}
+						textp = (cell.w||String(cell.v||0));
+						ct['office:value-type'] = "float";
+						ct['office:value'] = (cell.v||0);
 						break;
 					case 's': case 'str':
 						textp = cell.v == null ? "" : cell.v;
 						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) {
@ -303,17 +282,7 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 					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');
 		}
@ -364,9 +333,6 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 		o.push('  <style:style style:name="ta1" style:family="table" style:master-page-name="mp1">\n');
 		o.push('   <style:table-properties table:display="true" style:writing-mode="lr-tb"/>\n');
 		o.push('  </style:style>\n');
-		o.push('  <style:style style:name="ta2" style:family="table" style:master-page-name="mp1">\n');
-		o.push('   <style:table-properties table:display="false" 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');
@ -381,11 +347,9 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 		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})];
+				var c = Array.isArray(ws) ? (ws[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);
@ -454,7 +418,7 @@ 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.*?>/, "").replace(/<\/office:document-meta>/, "") + "\n");
 			// TODO: settings (equiv of settings.xml for ODS)
 		} else o.push('<office:document-content' + attr  + '>\n');
 		// o.push('  <office:scripts/>\n');
@ -462,7 +426,7 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 		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));
+		for(var i = 0; i != wb.SheetNames.length; ++i) o.push(write_ws(wb.Sheets[wb.SheetNames[i]], wb, i, opts, nfs));
 		if((wb.Workbook||{}).Names) o.push(write_names_ods(wb.Workbook.Names, wb.SheetNames, -1));
 		o.push('    </office:spreadsheet>\n');
 		o.push('  </office:body>\n');
--- 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; }
 }

@ -204,7 +196,7 @@ 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;
@ -257,7 +249,7 @@ 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
+	// TODO: pass back content types metdata for xlsm/xlsx resolution
 	out.bookType = xlsb ? "xlsb" : "xlsx";
 	return out;
 }
--- a/bits/86_writezip.js
+++ b/bits/86_writezip.js
@ -51,9 +51,6 @@ 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]];
@ -73,17 +70,6 @@ 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));
 				ct.comments.push(cf);
@ -115,8 +101,7 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 	/* 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);

@ -139,13 +124,6 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 	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));
--- 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 = typeof $cptable !== "undefined" ? $cptable.utils.decode(1200, d.slice(2), 'str') : utf16leread(d.slice(2));
 	o.type = "binary";
 	return read_plaintext(d, o);
 }
@ -75,8 +69,6 @@ function readSync(data/*:RawData*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
 	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));
-	/* Javet projects `byte[]` to `Int8Array` */
-	if(typeof Int8Array !== 'undefined' && data instanceof Int8Array) return readSync(new Uint8Array(data.buffer, data.byteOffset, data.length), 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;
 	if(o.cellStyles) { o.cellNF = true; o.sheetStubs = true; }
--- 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;
@ -104,20 +99,18 @@ function sheet_to_json(sheet/*:Worksheet*/, opts/*:?Sheet2JSONOpts*/) {
 }

 var qreg = /"/g;
-function make_csv_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, fs/*:number*/, rs/*:number*/, FS/*:string*/, w/*:number*/, o/*:Sheet2CSVOpts*/)/*:?string*/ {
+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;
 			txt = ''+(o.rawNumbers && val.t == "n" ? val.v : format_cell(val, null, o));
 			for(var i = 0, cc = 0; i !== txt.length; ++i) if((cc = txt.charCodeAt(i)) === fs || cc === rs || cc === 34 || o.forceQuotes) {txt = "\"" + txt.replace(qreg, '""') + "\""; break; }
-			if(txt == "ID" && w == 0 && row.length == 0) txt = '"ID"';
+			if(txt == "ID") txt = '"ID"';
 		} else if(val.f != null && !val.F) {
 			isempty = false;
 			txt = '=' + val.f; if(txt.indexOf(",") >= 0) txt = '"' + txt.replace(qreg, '""') + '"';
@ -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);
 }
@ -137,17 +129,21 @@ 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);
 	var w = 0;
 	for(var R = r.s.r; R <= r.e.r; ++R) {
 		if ((rowinfo[R]||{}).hidden) continue;
-		row = make_csv_row(sheet, r, R, cols, fs, rs, FS, w, o);
+		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("");
 }

@ -159,18 +155,18 @@ function sheet_to_txt(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	return String.fromCharCode(255) + String.fromCharCode(254) + o;
 }

-function sheet_to_formulae(sheet/*:Worksheet*/, opts/*:?Sheet2FormulaOpts*/)/*:Array<string>*/ {
+function sheet_to_formulae(sheet/*:Worksheet*/)/*:Array<string>*/ {
 	var y = "", x, val="";
 	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) {
@ -180,7 +176,6 @@ function sheet_to_formulae(sheet/*:Worksheet*/, opts/*:?Sheet2FormulaOpts*/)/*:A
 				if(y.indexOf(":") == -1) y = y + ":" + y;
 			}
 			if(x.f != null) val = x.f;
-			else if(opts && opts.values === false) continue;
 			else if(x.t == 'z') continue;
 			else if(x.t == 'n' && x.v != null) val = "" + x.v;
 			else if(x.t == 'b') val = x.v ? "TRUE" : "FALSE";
@ -196,11 +191,10 @@ function sheet_to_formulae(sheet/*:Worksheet*/, opts/*:?Sheet2FormulaOpts*/)/*:A

 function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*: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 offset = +!o.skipHeader;
-	var ws/*:Worksheet*/ = _ws || ({});
-	if(!_ws && dense) 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;
@ -219,27 +213,25 @@ 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];
+		if(!ws[_R + R + offset]) ws[_R + R + offset] = [];
+		var ROW = ws[_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 ref = dense ? "" : encode_cell({c:_C + C,r:_R + R + offset});
 			var cell/*:Cell*/ = dense ? ROW[_C + C] : 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]);
 				}
@ -247,7 +239,8 @@ function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet
 				if(!cell) {
 					if(!dense) ws[ref] = cell = ({t:t, v:v}/*:any*/);
 					else ROW[_C + C] = cell = ({t:t, v:v}/*:any*/);
-				} else {
+				}
+				else {
 					cell.t = t; cell.v = v;
 					delete cell.w; delete cell.R;
 					if(z) cell.z = z;
@ -258,9 +251,9 @@ 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(dense && !ws[_R]) ws[_R] = [];
 	if(offset) for(C = 0; C < hdr.length; ++C) {
-		if(dense) ws["!data"][_R][C + _C] = {t:'s', v:hdr[C]};
+		if(dense) ws[_R][C + _C] = {t:'s', v:hdr[C]};
 		else ws[encode_col(C + _C) + __R] = {t:'s', v:hdr[C]};
 	}
 	ws['!ref'] = encode_range(range);
@ -272,17 +265,18 @@ 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 */
@ -297,11 +291,9 @@ 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 */
@ -309,10 +301,10 @@ 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);
--- 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);
@ -19,8 +21,9 @@ function write_csv_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 		while(R <= r.e.r) {
 			++R;
 			if ((rowinfo[R-1]||{}).hidden) continue;
-			row = make_csv_row(sheet, r, R-1, cols, fs, rs, FS, w, o);
+			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;
@ -103,11 +107,8 @@ function write_json_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	R = r.s.r + offset;
 	stream._read = function() {
 		while(R <= r.e.r) {
-			if ((rowinfo[R]||{}).hidden) {
-				++R;
-				continue;
-			};
-			var row = make_json_row(sheet, r, R, cols, header, hdr, o);
+			if ((rowinfo[R-1]||{}).hidden) continue;
+			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);
@ -119,164 +120,9 @@ function write_json_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	return stream;
 }

-function write_xlml_stream(wb/*:Workbook*/, o/*:?Sheet2XLMLOpts*/) {
-	var stream = _Readable();
-	var opts = o == null ? {} : o;
-	var stride = +opts.stride || 10;
-	if(!wb.SSF) wb.SSF = dup(table_fmt);
-	if(wb.SSF) {
-		make_ssf(); SSF_load_table(wb.SSF);
-		// $FlowIgnore
-		opts.revssf = evert_num(wb.SSF); opts.revssf[wb.SSF[65535]] = 0;
-		opts.ssf = wb.SSF;
-		opts.cellXfs = [];
-		get_cell_style(opts.cellXfs, {}, {revssf:{"General":0}});
-	}
-
-	/* do one pass to determine styles since they must be added before tables */
-	wb.SheetNames.forEach(function(n) {
-		var ws = wb.Sheets[n];
-		if(!ws || !ws["!ref"]) return;
-		var range = decode_range(ws["!ref"]);
-		var dense = ws["!data"] != null;
-		var ddata = dense ? ws["!data"] : [];
-		var addr = {r:0,c:0};
-		for(var R = range.s.r; R <= range.e.r; ++R) {
-			addr.r = R;
-			if(dense && !ddata[R]) continue;
-			for(var C = range.s.c; C <= range.e.c; ++C) {
-				addr.c = C;
-				var cell = dense ? ddata[R][C] : ws[encode_col(C) + encode_row(R)];
-				if(!cell) continue;
-				if(cell.t == "d" && cell.z == null) { cell = dup(cell); cell.z = table_fmt[14]; }
-				void get_cell_style(opts.cellXfs, cell, opts);
-			}
-		}
-	});
-	var sty = write_sty_xlml(wb, opts);
-
-	var stage = 0, wsidx = 0, ws = wb.Sheets[wb.SheetNames[wsidx]], range = safe_decode_range(ws), R = -1, T = false;
-
-	var marr = [], mi = 0, dense = false, darr = [], addr = {r:0,c:0};
-
-	stream._read = function() { switch(stage) {
-		/* header */
-		case 0: {
-			stage = 1;
-			stream.push(XML_HEADER);
-			stream.push("<Workbook" + wxt_helper({
-				'xmlns':      XLMLNS.ss,
-				'xmlns:o':    XLMLNS.o,
-				'xmlns:x':    XLMLNS.x,
-				'xmlns:ss':   XLMLNS.ss,
-				'xmlns:dt':   XLMLNS.dt,
-				'xmlns:html': XLMLNS.html
-			}) + ">");
-		} break;
-
-		/* preamble */
-		case 1: {
-			stage = 2;
-			stream.push(write_props_xlml(wb, opts));
-			stream.push(write_wb_xlml(wb, opts));
-		} break;
-
-		/* style and name tables */
-		case 2: {
-			stage = 3;
-			stream.push(sty);
-			stream.push(write_names_xlml(wb, opts));
-		} break;
-
-		/* worksheet preamble */
-		case 3: {
-			T = false;
-			if(wsidx >= wb.SheetNames.length) { stage = -1; stream.push(""); break; }
-
-			stream.push("<Worksheet" + wxt_helper({ "ss:Name": escapexml(wb.SheetNames[wsidx])}) + ">");
-
-			ws = wb.Sheets[wb.SheetNames[wsidx]];
-			if(!ws) { stream.push("</Worksheet>"); return void ++wsidx; }
-
-			var names = write_ws_xlml_names(ws, opts, wsidx, wb);
-			if(names.length) stream.push("<Names>" + names + "</Names>");
-
-			if(!ws["!ref"]) return (stage = 5);
-			range = safe_decode_range(ws["!ref"]);
-			R = range.s.r;
-			stage = 4;
-		} break;
-
-		/* worksheet intramble */
-		case 4: {
-			if(R < 0 || R > range.e.r) { if(T) stream.push("</Table>"); return void (stage = 5); }
-
-			if(R <= range.s.r) {
-				if(ws['!cols']) ws['!cols'].forEach(function(n, i) {
-					process_col(n);
-					var w = !!n.width;
-					var p = col_obj_w(i, n);
-					var k/*:any*/ = {"ss:Index":i+1};
-					if(w) k['ss:Width'] = width2px(p.width);
-					if(n.hidden) k['ss:Hidden']="1";
-					if(!T) { T = true; stream.push("<Table>"); }
-					stream.push(writextag("Column",null,k));
-				});
-				dense = ws["!data"] != null;
-				if(dense) darr = ws["!data"];
-				addr.r = addr.c = 0;
-			}
-
-			/* process `stride` rows per invocation */
-			for(var cnt = 0; R <= range.e.r && cnt < stride; ++R, ++cnt) {
-				var row = [write_ws_xlml_row(R, (ws['!rows']||[])[R])];
-				addr.r = R;
-				if(!(dense && !darr[R])) for(var C = range.s.c; C <= range.e.c; ++C) {
-					addr.c = C;
-					var skip = false;
-					for(mi = 0; mi != marr.length; ++mi) {
-						if(marr[mi].s.c > C) continue;
-						if(marr[mi].s.r > R) continue;
-						if(marr[mi].e.c < C) continue;
-						if(marr[mi].e.r < R) continue;
-						if(marr[mi].s.c != C || marr[mi].s.r != R) skip = true;
-						break;
-					}
-					if(skip) continue;
-					var ref = encode_col(C) + encode_row(R), cell = dense ? darr[R][C] : ws[ref];
-					row.push(write_ws_xlml_cell(cell, ref, ws, opts, wsidx, wb, addr));
-				}
-				row.push("</Row>");
-				if(!T) { T = true; stream.push("<Table>"); }
-				stream.push(row.join(""));
-			}
-		} break;
-
-		/* worksheet postamble */
-		case 5: {
-			stream.push(write_ws_xlml_wsopts(ws, opts, wsidx, wb));
-			if(ws && ws["!autofilter"]) stream.push('<AutoFilter x:Range="' + a1_to_rc(fix_range(ws["!autofilter"].ref), {r:0,c:0}) + '" xmlns="urn:schemas-microsoft-com:office:excel"></AutoFilter>');
-			stream.push("</Worksheet>");
-			wsidx++; R = -1;
-			return void (stage = 3);
-		}
-
-		/* footer */
-		case -1: {
-			stage = -2;
-			stream.push("</Workbook>");
-		} break;
-
-		/* exeunt */
-		case -2: stream.push(null); break;
-	}};
-	return stream;
-}
-
 var __stream = {
 	to_json: write_json_stream,
 	to_html: write_html_stream,
 	to_csv: write_csv_stream,
-	to_xlml: write_xlml_stream,
 	set_readable: set_readable
 };
--- a/bits/98_exports.js
+++ b/bits/98_exports.js
@ -10,8 +10,6 @@ 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;
--- a/demos/README.md
+++ b/demos/README.md
@ -0,0 +1,78 @@
+# 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
+
+**JavaScript APIs**
+- [`XMLHttpRequest and fetch`](https://docs.sheetjs.com/docs/demos/network)
+- [`Clipboard Data`](https://docs.sheetjs.com/docs/demos/clipboard)
+- [`Typed Arrays for Machine Learning`](https://docs.sheetjs.com/docs/demos/ml)
+- [`LocalStorage and SessionStorage`](https://docs.sheetjs.com/docs/demos/database#localstorage-and-sessionstorage)
+- [`Web SQL Database`](https://docs.sheetjs.com/docs/demos/database#websql)
+- [`IndexedDB`](https://docs.sheetjs.com/docs/demos/database#indexeddb)
+
+**Frameworks**
+- [`Angular 2+ and Ionic`](https://docs.sheetjs.com/docs/demos/angular)
+- [`React`](https://docs.sheetjs.com/docs/demos/react)
+- [`VueJS`](https://docs.sheetjs.com/docs/demos/vue)
+- [`Angular.JS`](https://docs.sheetjs.com/docs/demos/legacy#angularjs)
+- [`Knockout`](https://docs.sheetjs.com/docs/demos/legacy#knockoutjs)
+
+**Front-End UI Components**
+- [`canvas-datagrid`](https://docs.sheetjs.com/docs/demos/grid#canvas-datagrid)
+- [`x-spreadsheet`](https://docs.sheetjs.com/docs/demos/grid#x-spreadsheet)
+- [`react-data-grid`](https://docs.sheetjs.com/docs/demos/grid#react-data-grid)
+- [`vue3-table-lite`](https://docs.sheetjs.com/docs/demos/grid#vue3-table-lite)
+- [`angular-ui-grid`](https://docs.sheetjs.com/docs/demos/grid#angular-ui-grid)
+
+**Platforms and Integrations**
+- [`Command-Line Tools`](https://docs.sheetjs.com/docs/demos/cli)
+- [`iOS and Android Mobile Applications`](https://docs.sheetjs.com/docs/demos/mobile)
+- [`NodeJS Server-Side Processing`](https://docs.sheetjs.com/docs/demos/server#nodejs)
+- [`Content Management and Static Sites`](https://docs.sheetjs.com/docs/demos/content)
+- [`Electron`](https://docs.sheetjs.com/docs/demos/desktop#electron)
+- [`NW.js`](https://docs.sheetjs.com/docs/demos/desktop#nwjs)
+- [`Tauri`](https://docs.sheetjs.com/docs/demos/desktop#tauri)
+- [`Chrome and Chromium Extensions`](https://docs.sheetjs.com/docs/demos/chromium)
+- [`Google Sheets API`](https://docs.sheetjs.com/docs/demos/gsheet)
+- [`ExtendScript for Adobe Apps`](https://docs.sheetjs.com/docs/demos/extendscript)
+- [`NetSuite SuiteScript`](https://docs.sheetjs.com/docs/demos/netsuite)
+- [`SalesForce Lightning Web Components`](https://docs.sheetjs.com/docs/demos/salesforce)
+- [`Excel JavaScript API`](https://docs.sheetjs.com/docs/demos/excel)
+- [`Headless Automation`](https://docs.sheetjs.com/docs/demos/headless)
+- [`Other JavaScript Engines`](https://docs.sheetjs.com/docs/demos/engines)
+- [`Azure Functions and Storage`](https://docs.sheetjs.com/docs/demos/azure)
+- [`Amazon Web Services`](https://docs.sheetjs.com/docs/demos/aws)
+- [`Databases and Structured Data Stores`](https://docs.sheetjs.com/docs/demos/database)
+- [`NoSQL and Unstructured Data Stores`](https://docs.sheetjs.com/docs/demos/nosql)
+- [`Legacy Internet Explorer`](https://docs.sheetjs.com/docs/demos/legacy#internet-explorer)
+
+**Bundlers and Tooling**
+- [`browserify`](https://docs.sheetjs.com/docs/demos/bundler#browserify)
+- [`bun`](https://docs.sheetjs.com/docs/demos/bundler#bun)
+- [`esbuild`](https://docs.sheetjs.com/docs/demos/bundler#esbuild)
+- [`parcel`](https://docs.sheetjs.com/docs/demos/bundler#parcel)
+- [`requirejs`](https://docs.sheetjs.com/docs/demos/bundler#requirejs)
+- [`rollup`](https://docs.sheetjs.com/docs/demos/bundler#rollup)
+- [`snowpack`](https://docs.sheetjs.com/docs/demos/bundler#snowpack)
+- [`swc`](https://docs.sheetjs.com/docs/demos/bundler#swc)
+- [`systemjs`](https://docs.sheetjs.com/docs/demos/bundler#systemjs)
+- [`vite`](https://docs.sheetjs.com/docs/demos/bundler#vite)
+- [`webpack`](https://docs.sheetjs.com/docs/demos/bundler#webpack)
+- [`wmr`](https://docs.sheetjs.com/docs/demos/bundler#wmr)
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/altjs/README.md
+++ b/demos/altjs/README.md
@ -0,0 +1,7 @@
+# Other JS Engines and Deployments
+
+[The new demo](https://docs.sheetjs.com/docs/demos/engines)
+includes more detailed instructions and more JS engines.
+
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/angular/README.md
+++ b/demos/angular/README.md
@ -0,0 +1,10 @@
+# AngularJS
+
+The content has been reorganized;
+
+- [The "Legacy Frameworks" section](https://docs.sheetjs.com/docs/demos/legacy#angularjs)
+  covers the AngularJS basics.
+- [The "Angular UI Grid" section](https://docs.sheetjs.com/docs/demos/legacy#angularjs)
+  covers the integration with Angular UI Grid.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/angular2/README.md
+++ b/demos/angular2/README.md
@ -0,0 +1,11 @@
+# Angular 2+
+
+[The new demo](https://docs.sheetjs.com/docs/demos/angular) has an updated
+exposition for legacy and modern deployments alike.
+
+The ecosystem demos were grouped by type in the new demo site:
+
+- [NativeScript](https://docs.sheetjs.com/docs/demos/mobile#nativescript) is now part of "iOS and Android Apps"
+- [Ionic](https://docs.sheetjs.com/docs/demos/mobile#ionic) is now part of "iOS and Android Apps"
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/array/README.md
+++ b/demos/array/README.md
@ -0,0 +1,6 @@
+# Typed Arrays and Math
+
+[The new demo](https://docs.sheetjs.com/docs/demos/ml) includes 
+interactive examples as well as strategies for CSV and JS Array interchange.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/browserify/README.md
+++ b/demos/browserify/README.md
@ -0,0 +1,6 @@
+# Browserify
+
+[The new demo](https://docs.sheetjs.com/docs/demos/bundler#browserify)
+includes a more concise example.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/chrome/README.md
+++ b/demos/chrome/README.md
@ -0,0 +1,6 @@
+# Chrome and Chromium
+
+[The new demo](https://docs.sheetjs.com/docs/demos/chromium)
+includes more up-to-date details.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/database/README.md
+++ b/demos/database/README.md
@ -0,0 +1,11 @@
+# Databases
+
+This demo has been split up for clarity:
+
+- <https://docs.sheetjs.com/docs/demos/database> covers SQL and
+  structured data (including CRUD operations)
+
+- https://docs.sheetjs.com/docs/demos/nosql covers unstructured
+  data including "NoSQL" data stores.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/datagrid/README.md
+++ b/demos/datagrid/README.md
@ -0,0 +1,7 @@
+# canvas-datagrid
+
+[The new demo](https://docs.sheetjs.com/docs/demos/grid#canvas-datagrid)
+includes a live example and improved explanations.
+
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/deno/README.md
+++ b/demos/deno/README.md
@ -0,0 +1,13 @@
+# Deno
+
+Deno is a runtime capable of running JS code including this library.
+
+Demos have been integrated in the [documentation](https://docs.sheetjs.com) :
+
+- <https://docs.sheetjs.com/docs/installation/deno> installation
+- <https://docs.sheetjs.com/docs/example> writing JS data to a spreadsheet
+- <https://docs.sheetjs.com/docs/solutions/input> input strategies
+- <https://docs.sheetjs.com/docs/solutions/output> output strategies
+- <https://docs.sheetjs.com/docs/demos/cli#deno> `deno compile`
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/electron/README.md
+++ b/demos/electron/README.md
@ -0,0 +1,6 @@
+# Electron
+
+[The new demo](https://docs.sheetjs.com/docs/demos/desktop#electron)
+includes an improved example and detailed explanations.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/extendscript/README.md
+++ b/demos/extendscript/README.md
@ -0,0 +1,7 @@
+# Adobe ExtendScript
+
+[The new demo](https://docs.sheetjs.com/docs/demos/extendscript)
+has a more focused Photoshop example as well as notes about other extensibility
+frameworks shipping with newer versions of Creative Cloud apps.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/function/README.md
+++ b/demos/function/README.md
@ -0,0 +1,9 @@
+# "Serverless" Functions
+
+Cloud services are covered in separate demos:
+
+- [AWS](https://docs.sheetjs.com/docs/demos/aws)
+- [Azure](https://docs.sheetjs.com/docs/demos/azure)
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
+
--- a/demos/google-sheet/README.md
+++ b/demos/google-sheet/README.md
@ -0,0 +1,9 @@
+# Google Sheets API
+
+The old demo used a deprecated version of the Google Sheets API to export data
+from Google Sheets Documents.
+
+[The new demo](https://docs.sheetjs.com/docs/demos/gsheet) uses
+the new Google Sheets API to read and write data.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/headless/README.md
+++ b/demos/headless/README.md
@ -0,0 +1,8 @@
+# Headless Browsers
+
+[The new demo](https://docs.sheetjs.com/docs/demos/headless)
+has a more focused table export example as well as a demo script for Chromium
+automation with Puppeteer and multi-browser automation with Playwright.
+
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/knockout/README.md
+++ b/demos/knockout/README.md
@ -0,0 +1,7 @@
+# Knockout
+
+[The new demo](https://docs.sheetjs.com/docs/demos/legacy#knockoutjs)
+includes a live example and improved explanations.
+
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/meteor/README.md
+++ b/demos/meteor/README.md
@ -0,0 +1,8 @@
+# Meteor
+
+This demo originally covered Meteor's package manager and other nuances.  At the
+time the demo was written, Meteor had its own ecosystem that clashed with the
+burgeoning NodeJS package ecosystem.  Eventually, Meteor added proper support
+for NodeJS modules.  New projects should follow the instructions for packages.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/nwjs/README.md
+++ b/demos/nwjs/README.md
@ -0,0 +1,6 @@
+# NW.js
+
+[The new demo](https://docs.sheetjs.com/docs/demos/desktop#nwjs)
+includes an improved example and detailed explanations.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/oldie/README.md
+++ b/demos/oldie/README.md
@ -0,0 +1,6 @@
+# Internet Explorer
+
+[The new demo](https://docs.sheetjs.com/docs/demos/legacy#internet-explorer)
+includes a live example and easier integration bundle.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/parcel/README.md
+++ b/demos/parcel/README.md
@ -0,0 +1,6 @@
+# Parcel
+
+[The new demo](https://docs.sheetjs.com/docs/demos/bundler#parcel)
+includes a more concise example.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/react/README.md
+++ b/demos/react/README.md
@ -0,0 +1,12 @@
+# React
+
+[The new demo](https://docs.sheetjs.com/docs/demos/react) has an updated
+exposition for legacy and modern deployments alike.
+
+The ecosystem demos were grouped by type in the new demo site:
+
+- [server-rendered React components with `next.js`](https://docs.sheetjs.com/docs/demos/content#nextjs) is now part of "Content and Site Generation"
+- [`react-native` deployment for iOS and android](https://docs.sheetjs.com/docs/demos/mobile#react-native) is now part of "iOS and Android Apps"
+- [`react-data-grid` reading, modifying, and writing files](https://docs.sheetjs.com/docs/demo/grid#react-data-grid) is now part of "Data Grids and UI"
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/requirejs/README.md
+++ b/demos/requirejs/README.md
@ -0,0 +1,7 @@
+# RequireJS
+
+[The new demo](https://docs.sheetjs.com/docs/demos/bundler#requirejs)
+includes a live example and improved explanations.
+
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/rollup/README.md
+++ b/demos/rollup/README.md
@ -0,0 +1,7 @@
+# Rollup
+
+[The new demo](https://docs.sheetjs.com/docs/demos/bundler#rollup)
+includes a simple example and improved explanations.
+
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/server/README.md
+++ b/demos/server/README.md
@ -0,0 +1,11 @@
+# NodeJS Server Deployments
+
+[The new demo](https://docs.sheetjs.com/docs/demos/server) has a more focused
+discussion with examples for popular JS server-side frameworks.
+
+Cloud services are covered in separate demos:
+
+- [AWS](https://docs.sheetjs.com/docs/demos/aws)
+- [Azure](https://docs.sheetjs.com/docs/demos/azure)
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/systemjs/README.md
+++ b/demos/systemjs/README.md
@ -0,0 +1,6 @@
+# SystemJS Demos
+
+[The new demo](https://docs.sheetjs.com/docs/demos/bundler#systemjs)
+includes a live example and improved explanations.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/typescript/README.md
+++ b/demos/typescript/README.md
@ -0,0 +1,9 @@
+# TypeScript
+
+This demo originally covered direct use of the `tsc` TypeScript compiler.  At
+the time when the demo was first written, TypeScript 2.2 had a module system
+that was incompatible with the pure JS ecosystem.  Since then, various
+language improvements and compiler changes have obviated this demo.  Uses of
+TypeScript are scattered throughout other demos.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/vue/README.md
+++ b/demos/vue/README.md
@ -0,0 +1,12 @@
+# VueJS
+
+[The new demo](https://docs.sheetjs.com/docs/demos/vue) has an updated
+exposition for legacy and modern deployments alike.
+
+The ecosystem demos were grouped by type in the new demo site:
+
+- [Nuxt Content](https://docs.sheetjs.com/docs/demos/content#nuxtjs) is now part of "Content and Site Generation"
+- [The new iOS app demo](https://docs.sheetjs.com/docs/demos/mobile#quasar) uses the Quasar Framework in a VueJS + Vite project to generate a native iOS app.
+- [`vue3-table-lite` reading, modifying, and writing files](https://docs.sheetjs.com/docs/demo/grid#vue3-table-lite) is now part of "Data Grids and UI"
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/webpack/README.md
+++ b/demos/webpack/README.md
@ -0,0 +1,6 @@
+# Webpack
+
+[The new demo](https://docs.sheetjs.com/docs/demos/bundler#webpack)
+reflects the new default behavior to use the ESM build.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/xhr/README.md
+++ b/demos/xhr/README.md
@ -0,0 +1,7 @@
+# XMLHttpRequest and fetch
+
+[The new demo](https://docs.sheetjs.com/docs/demos/network)
+includes interactive demos and improved explanations.
+
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/xspreadsheet/README.md
+++ b/demos/xspreadsheet/README.md
@ -0,0 +1,18 @@
+# x-spreadsheet
+
+The `sheet_to_json` utility function generates output arrays suitable for use
+with other JS libraries such as data grids for previewing data.  With a familiar
+UI, [`x-spreadsheet`](https://myliang.github.io/x-spreadsheet/) is an excellent
+choice for developers looking for a modern editor.
+
+[The new docs](https://docs.sheetjs.com/docs/demos/grid/#x-spreadsheet)
+include more detail and examples.
+
+The original demo is available at <https://docs.sheetjs.com/xspreadsheet/>
+
+A hosted version of the `xlsxspread.js` script is available on the SheetJS CDN:
+
+- <https://cdn.sheetjs.com/xspreadsheet/xlsxspread.js> original script
+- <https://cdn.sheetjs.com/xspreadsheet/xlsxspread.min.js> minified
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/Show More
+++ b/Show More