The OASIS Open Document Format for Office Applications (ODF) is an XML standard that lets you store and exchange office application documents, including word-processor, spreadsheet, and presentation files. Whether you try to perform special tasks on files saved from such applications or work on applications to process such files, you should become familiar with this important format. Learn about the two possible forms of OpenDocument files, as multipart packages and as single XML documents, and learn how to structure text and tabular information in OpenDocument.