The Open Document Format for Office Applications (also known as OpenDocument or ODF) is an XML-based file format for representing electronic documents such as spreadsheets, charts, presentations and word processing documents.
While the specifications were originally developed by Sun Microsystems, the standard was developed by the OASIS Open Document Format for Office Applications (OpenDocument) TC - OASIS ODF TC [2], committee of the Organization for the Advancement of Structured Information Standards (OASIS) consortium and based on the XML format originally created and implemented by the OpenOffice.org office suite (see OpenOffice.org XML).

In addition to being an OASIS standard, it is published (in one of its version 1.0 manifestations) as an ISO/IEC international standard, ISO/IEC 26300:2006 Open Document Format for sentrip Office Applications (OpenDocument) v1.0.[3]