Office Open XML file formats

Office Open XML Document

Filename extension	.docx, .docm
Internet media type	application/vnd. openxmlformats-officedocument. wordprocessingml. document[1]
Developed by	Microsoft, Ecma, ISO/IEC
Initial release	2006; 18 years ago (2006)
Type of format	Document file format
Extended from	XML, DOC, WordProcessingML
Standard	ECMA-376, ISO/IEC 29500
Website	ECMA-376, ISO/IEC 29500:2008

Office Open XML Presentation

Filename extension	.pptx, .pptm
Internet media type	application/vnd. openxmlformats-officedocument. presentationml. presentation[1]
Developed by	Microsoft, Ecma, ISO/IEC
Type of format	Presentation
Extended from	XML, PPT
Standard	ECMA-376, ISO/IEC 29500
Website	ECMA-376, ISO/IEC 29500:2008

Office Open XML Workbook

Filename extension	.xlsx, .xlsm
Internet media type	application/vnd. openxmlformats-officedocument. spreadsheetml. sheet[1]
Developed by	Microsoft, Ecma, ISO/IEC
Type of format	Spreadsheet
Extended from	XML, XLS, SpreadsheetML
Standard	ECMA-376, ISO/IEC 29500
Website	ECMA-376, ISO/IEC 29500:2008

The Office Open XML file formats are a set of file formats that can be used to represent electronic office documents. There are formats for word processing documents, spreadsheets and presentations as well as specific formats for material such as mathematical formulas, graphics, bibliographies etc.

The formats were developed by Microsoft and first appeared in Microsoft Office 2007. They were standardized between December 2006 and November 2008, first by the Ecma International consortium, where they became ECMA-376, and subsequently, after a contentious standardization process, by the ISO/IEC's Joint Technical Committee 1, where they became ISO/IEC 29500:2008.