file format, standard
(ODF, ISO/IEC 26300, OASIS Open Document Format for Office Applications) An XML file format for office documents, such as spreadsheets, charts, presentations, databases and word processing.
OpenDocument was developed by the Open Office XML technical committee of the Organization for the Advancement of Structured Information Standards (OASIS) consortium. It is based on the XML format originally created and implemented by the OpenOffice.org office suite. OpenDocument is an open standard, i.e. freely available and implementable.