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---
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# References
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2024-04-08 04:47:04 +00:00
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Some of our original research is documented at https://oss.sheetjs.com/notes/
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The specifications list is non-exhaustive.
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2023-06-25 19:57:03 +00:00
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- Worksheet File Format (From Lotus) December 1984[^1]
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- Open Document Format for Office Applications Version 1.3
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2023-06-25 19:57:03 +00:00
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:::info pass
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2022-08-25 08:22:28 +00:00
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The primary specifications for XLSX are:
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- `ISO/IEC 29500` "Information technology — Document description and processing languages — Office Open XML File Formats"
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- `ECMA-376` "Office Open XML file formats"
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As some editions of `ECMA-376` are identical to `ISO` specification editions,
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most of the public XLSX document community use the spec names interchangeably.
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:::
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## Open Specifications Promise
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2023-06-25 19:57:03 +00:00
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Lotus dedicated the "Worksheet File Format" documentation to the Public Domain.
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Microsoft opted for the "Open Specifications Promise", a covenant not to sue.
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The documentation that falls under the promise are listed below.
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2024-04-08 04:47:04 +00:00
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<details>
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<summary><b>Specifications</b> (click to show)</summary>
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- `MS-CFB`: Compound File Binary File Format
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- `MS-CTXLS`: Excel Custom Toolbar Binary File Format
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- `MS-EXSPXML3`: Excel Calculation Version 2 Web Service XML Schema
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- `MS-ODATA`: Open Data Protocol (OData)
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- `MS-ODRAW`: Office Drawing Binary File Format
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- `MS-ODRAWXML`: Office Drawing Extensions to Office Open XML Structure
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- `MS-OE376`: Office Implementation Information for ECMA-376 Standards Support
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- `MS-OFFCRYPTO`: Office Document Cryptography Structure
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- `MS-OI29500`: Office Implementation Information for `ISO/IEC 29500` Standards Support
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- `MS-OLEDS`: Object Linking and Embedding (OLE) Data Structures
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- `MS-OLEPS`: Object Linking and Embedding (OLE) Property Set Data Structures
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- `MS-OODF3`: Office Implementation Information for ODF 1.2 Standards Support
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- `MS-OSHARED`: Office Common Data Types and Objects Structures
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- `MS-OVBA`: Office VBA File Format Structure
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- `MS-XLDM`: Spreadsheet Data Model File Format
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- `MS-XLS`: Excel Binary File Format (.xls) Structure Specification
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- `MS-XLSB`: Excel (.xlsb) Binary File Format
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- `MS-XLSX`: Excel (.xlsx) Extensions to the Office Open XML SpreadsheetML File Format
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- `XLS`: Microsoft Office Excel 97-2007 Binary File Format Specification
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- `RTF`: Rich Text Format
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2022-06-21 12:26:53 +00:00
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</details>
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## Other Resources
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- ISBN 1556155212 "Excel Software Development Kit Version 4"
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- ISBN 1556156324 "Excel Developer's Kit Version 5"
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[^1]: The original FTP server is no longer available, but the content has been
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mirrored at https://oss.sheetjs.com/notes/lotus/. Lotus Corporation
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dedicated the content to the public domain in 1984.
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