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Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Word ever since. Pertaining file extensions include:.docx – Word document.docm – Word macro-enabled document; same as docx, but may contain macros and scripts.dotx – Word template
In 2000, Microsoft released an initial version of an XML-based format for Microsoft Excel, which was incorporated in Office XP. In 2002, a new file format for Microsoft Word followed. [9] The Excel and Word formats—known as the Microsoft Office XML formats—were later incorporated into the 2003 release of Microsoft Office.
Predecessor file format Microsoft Office XML formats: OpenOffice.org XML: Standardized by Ecma International, ISO/IEC: OASIS, ISO/IEC: First public release date 2006 2005 First stable version Ecma International Standard ECMA-376 Office Open XML File Formats 1st edition OASIS OpenDocument Format for Office Applications (OpenDocument) v1.0
Besides differences in the schema, there are several other differences between the earlier Office XML schema formats and Office Open XML. Whereas the data in Office Open XML documents is stored in multiple parts and compressed in a ZIP file conforming to the Open Packaging Conventions, Microsoft Office XML formats are stored as plain single monolithic XML files (making them quite large ...
A basic package contains an XML file called [Content_Types].xml at the root, along with three directories: _rels, docProps, and a directory specific for the document type (for example, in a .docx word processing package, there would be a word directory). The word directory contains the document.xml file which is the core content of the document.
In Microsoft Word 2007 and later, the binary file format was replaced as the default format by the Office Open XML (.docx) format, though Microsoft Word can still produce and open DOC files. Microsoft released the Office Compatibility Pack allowing users of Word 2003, 2002, 2000 and 97 to open the new format as well as edit and save them. [8]
Office 2007 also introduced Office Open XML file formats as the default file formats in Excel, PowerPoint, and Word. The new formats are intended to facilitate the sharing of information between programs, improve security, reduce the size of documents, and enable new recovery scenarios. [10]
Microsoft Office 2013, 2016, 2019, 2021 and Microsoft 365 continue to read and write files that are conformant to ISO/IEC 29500 Transitional by default. Microsoft Office 2013 and later fully support ISO/IEC 29500 Strict, [73] but do not use it as the default file format because of backwards compatibility concerns. [74]