The Interop Glossary

An evolving vocabulary for the law of interoperability governing electronic data format and communication protocol technical specifications, standards, and technical regulations.

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OASIS
Organization for the Advancement of Structured Information Standards. A software industry consortium based in the U.S. that develops data format voluntary standards. See About OASIS web page.
ODF
An acronym widely used to refer to any version or derivative of a particular family of XML compound document file formats for office productivity software, one version of which is the international standard ISO/IEC:26300-2006 OpenDocument. ODF is derived from the XML schemas originally developed for Sun Microsystems' StarOffice/OpenOffice.org office suites. Contrary to widespread misinformation, the OpenDocument formats were not designed for interoperability and are grossly under-specified for that purpose.
OOXML
Office Open XML. A term used to describe various versions of a family of office productivity XML compound document formats originally developed by Microsoft. There are significant differences among versions. One version has been adopted as the international standard ISO/IEC:29500-2008. Contrary to widespread misinformation, OOXML was not designed for interoperability and is grossly under-specified for that purpose.