Office Open XML |
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![]() The OOXML Document icon, as appears on the Microsoft OneDrive web service | |
Filename extension |
.docx, .docm |
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Internet media type | |
Developed by | Microsoft, Ecma, ISO, IEC |
Initial release | 7 December 2006 |
Latest release | 4th edition 26 October 2016 |
Type of format | Document file format |
Extended from | XML, DOC, WordProcessingML |
Standard | ECMA-376, ISO/IEC 29500 |
Open format? | Yes[2] |
Website | ECMA-376, ISO/IEC 29500-1:2016 |
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Filename extension |
.pptx, .pptm |
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Internet media type | |
Developed by | Microsoft, Ecma, ISO, IEC |
Initial release | 7 December 2006 |
Latest release | 3rd edition 29 June 2011 |
Type of format | Presentation |
Extended from | XML, PPT |
Standard | ECMA-376, ISO/IEC 29500 |
Open format? | Yes |
Website | ECMA-376, ISO/IEC 29500:2016 |
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Filename extension |
.xlsx, .xlsm |
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Internet media type | |
Developed by | Microsoft, Ecma, ISO, IEC |
Initial release | 7 December 2006 | (as Microsoft Open XML)
Latest release | 3rd edition 29 June 2011 |
Type of format | Spreadsheet |
Extended from | XML, XLS, SpreadsheetML |
Standard | ECMA-376, ISO/IEC 29500 |
Open format? | Yes |
Website | ECMA-376, ISO/IEC 29500:2016 |
Office Open XML (also informally known as OOXML)[3] is a zipped, XML-based file format developed by Microsoft for representing spreadsheets, charts, presentations and word processing documents. Ecma International standardized the initial version as ECMA-376. ISO and IEC standardized later versions as ISO/IEC 29500.
Microsoft Office 2010 provides read support for ECMA-376, full support for ISO/IEC 29500 Transitional, and read support for ISO/IEC 29500 Strict.[4] Microsoft Office 2013 and later fully support ISO/IEC 29500 Strict,[5] but do not use it as the default file format because of backwards compatibility concerns.[6]
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