Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. This document describes the technical specifications of the OpenDocument office document standard, as developed by the OASIS industry consortium. A variety of organizations developed the standard publicly and make it publicly accessible, meaning it can be implemented by anyone without restriction. The OpenDocument format aims to provide an open alternative to proprietary document formats. The OpenDocument format supports the following two ways of document representation: As a single XML document – also known as Flat XML or Uncompressed XML Files. Single OpenDocument XML files are not widely used. Filename extensions for a single OpenDocument XML documents are not defined in the OpenDocument technical specification, but commonly used are .xml, .fodt, .fods, ... etc.