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							|  |  |  | # References
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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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										 |  |  |  - Worksheet File Format (From Lotus) December 1984 | 
					
						
							|  |  |  |  - Open Document Format for Office Applications Version 1.2 (29 September 2011) | 
					
						
							|  |  |  |  - ISO/IEC 29500:2012(E) "Information technology — Document description and processing languages — Office Open XML File Formats" | 
					
						
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							|  |  |  | ## Open Specifications Promise
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							|  |  |  | Lotus released their "Worksheet File Format" documentation into the Public | 
					
						
							|  |  |  | Domain.  Microsoft opted for the "Open Specifications Promise", a covenant not | 
					
						
							|  |  |  | to sue.  The documentation that falls under the promise are listed below. | 
					
						
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							|  |  |  | <details><summary><b>Specifications</b> (click to show)</summary> | 
					
						
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							|  |  |  |  - `MS-CFB`: Compound File Binary File Format | 
					
						
							|  |  |  |  - `MS-CTXLS`: Excel Custom Toolbar Binary File Format | 
					
						
							|  |  |  |  - `MS-EXSPXML3`: Excel Calculation Version 2 Web Service XML Schema | 
					
						
							|  |  |  |  - `MS-ODATA`: Open Data Protocol (OData) | 
					
						
							|  |  |  |  - `MS-ODRAW`: Office Drawing Binary File Format | 
					
						
							|  |  |  |  - `MS-ODRAWXML`: Office Drawing Extensions to Office Open XML Structure | 
					
						
							|  |  |  |  - `MS-OE376`: Office Implementation Information for ECMA-376 Standards Support | 
					
						
							|  |  |  |  - `MS-OFFCRYPTO`: Office Document Cryptography Structure | 
					
						
							|  |  |  |  - `MS-OI29500`: Office Implementation Information for ISO/IEC 29500 Standards Support | 
					
						
							|  |  |  |  - `MS-OLEDS`: Object Linking and Embedding (OLE) Data Structures | 
					
						
							|  |  |  |  - `MS-OLEPS`: Object Linking and Embedding (OLE) Property Set Data Structures | 
					
						
							|  |  |  |  - `MS-OODF3`: Office Implementation Information for ODF 1.2 Standards Support | 
					
						
							|  |  |  |  - `MS-OSHARED`: Office Common Data Types and Objects Structures | 
					
						
							|  |  |  |  - `MS-OVBA`: Office VBA File Format Structure | 
					
						
							|  |  |  |  - `MS-XLDM`: Spreadsheet Data Model File Format | 
					
						
							|  |  |  |  - `MS-XLS`: Excel Binary File Format (.xls) Structure Specification | 
					
						
							|  |  |  |  - `MS-XLSB`: Excel (.xlsb) Binary File Format | 
					
						
							|  |  |  |  - `MS-XLSX`: Excel (.xlsx) Extensions to the Office Open XML SpreadsheetML File Format | 
					
						
							|  |  |  |  - `XLS`: Microsoft Office Excel 97-2007 Binary File Format Specification | 
					
						
							|  |  |  |  - `RTF`: Rich Text Format | 
					
						
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										 |  |  | </details> | 
					
						
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							|  |  |  | ## Other Resources
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							|  |  |  | - ISBN 1556155212 "Excel Software Development Kit Version 4" | 
					
						
							|  |  |  | - ISBN 1556156324 "Excel Developer's Kit Version 5" |