OpenDocument technical specification: Difference between revisions

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* Objects that do not have an XML representation and only have a binary representation. Examples for these kinds of objects are [[raster images]], recorded audios and videos, and [[Object Linking and Embedding|OLE]] objects.<ref>According to the OpenDocument 1.0 specification, OLE is defined in ''Kraig Brockschmidt, Inside OLE, Microsoft Press, 1995, {{ISBN|1-55615-843-2}}''.</ref>

Use of Microsoft Object Linking and Embedding (OLE) objects limits the interoperability, because these objects are not widely supported in programs for viewing or editing files (e.g. embedding of other files inside the file, such as tables or charts from a spreadsheet application in a text document or presentation file).<ref>{{cite web |url=https://www.linux.com/news/foss-word-processors-compared-ooo-writer-abiword-and-kword/ |title=FOSS word processors compared: OOo Writer, AbiWord, and KWord |author=Bruce Byfield |date=2005-08-23 |accessdate=2010-04-06}}</ref><ref>{{cite web |url=http://www.linux.com/archive/feed/46599 |title=Sharing files between OpenOffice.org and Microsoft Office |date=2005-07-28 |accessdate=2010-04-06 |url-status=dead |archiveurl=https://web.archive.org/web/20100204134005/http://www.linux.com/archive/feed/46599 |archivedate=2010-02-04 }}</ref><ref>{{cite web |url=https://www.linux.com/news/softmaker-office-2008-focuses-compatibility-microsoft-office/ |title=SoftMaker Office 2008 focuses on compatibility with Microsoft Office |date=2008-11-20 |accessdate=2010-04-06}}</ref><ref>{{cite web |url=https://www.linux.com/news/softmaker-office-2006-beta-not-killer-app/ |title=SoftMaker Office 2006 beta: Not a killer app |date=2006-11-21 |accessdate=2010-04-06 }}</ref><ref>{{citation |url=http://pacsec.jp/psj06/psj06lagadec-e.pdf |format=PDF |title=OpenOffice / OpenDocument and Microsoft Office 2007 / Open XML security |author=Philippe Lagadec |date=2006-11-30 |accessdate=2010-04-06 |archive-date=2011-07-22 |archive-url=https://web.archive.org/web/20110722122720/http://pacsec.jp/psj06/psj06lagadec-e.pdf |url-status=dead }}</ref> If a software that understands an OLE object is not available, the object is usually replaced by a picture (bitmap representation of the object) or not displayed at all.<ref>{{cite web |url=http://www.keyongtech.com/2560234-ole-object-bitmap-representation |title=OLE object - bitmap representation? |accessdate=2010-04-06 |url-status=dead |archiveurl=https://web.archive.org/web/20110724111954/http://www.keyongtech.com/2560234-ole-object-bitmap-representation |archivedate=2011-07-24 }}</ref><ref>{{cite web |url=http://www.codeproject.com/KB/edit/COleRichEditCtrl.aspx |title=A Rich Edit Control That Displays Bitmaps and Other OLE Objects |accessdate=2010-04-06}}</ref><ref>{{cite web |url=http://support.microsoft.com/kb/123151 |archive-url=https://web.archive.org/web/20091213042624/http://support.microsoft.com/kb/123151 |url-status=dead |archive-date=2009-12-13 |title=ACC: Why OLE Objects Cause Databases to Grow |date=2007-01-19 |accessdate=2010-04-29}}</ref>

===Formatting===

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==Format internals==

An OpenDocument file commonly consists of a standard [[ZIP (file format)|ZIP]] archive ([[JAR (file format)|JAR]] archive<ref>{{cite web |last=Sobhi |first=Ali |date=2007-08-14 |orig-date=August 2006 |title=Introduction to OpenDocument Format |publication-place=Armonk, New York, United States |publisher=[[IBM]] |url=http://www-03.ibm.com/able/resources/odfintro.html |archive-url=https://web.archive.org/web/20080602152400/http://www-03.ibm.com/able/resources/odfintro.html |url-status=dead |archive-date=2008-06-02 |title=Web resources & interesting links - easy and simple introduction to OpenDocument Format (ODF) |accessdate=2010-06-07}}</ref>) containing a number of files and directories; but OpenDocument file can also consist only of a single XML document. An OpenDocument file is commonly a collection of several subdocuments within a (ZIP) ''package''. An OpenDocument file as a ''single XML'' is not widely used.

According to the OpenDocument 1.0 specification, the ZIP file specification is defined in ''Info-ZIP Application Note 970311, 1997''.<ref>{{cite web |url=http://tools.oasis-open.org/issues/browse/OFFICE-2205 |title=NEEDS-DISCUSSION: ZIP reference - N 1309 |accessdateaccess-date=2010-06-07}}</ref><ref>{{cite web |url=http://tools.oasis-open.org/issues/browse/OFFICE-2082 |title= Zip reference is neither public nor authoritative |date=2009-10-11 |accessdateaccess-date=2010-06-07}}</ref>

The simple compression mechanism used for a package normally makes OpenDocument files significantly smaller than equivalent Microsoft "<code>.doc</code>" or "<code>.ppt</code>" files. This smaller size is important for organizations who store a vast number of documents for long periods of time, and to those organizations who must exchange documents over low bandwidth connections. Once uncompressed, most data is contained in simple text-based XML files, so the uncompressed data contents have the typical ease of modification and processing of XML files. The standard also allows for the creation of a single XML document, which uses ''<office:document>'' as the root element, for use in document processing.