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Each sub-document within a package has a different document root and stores a particular aspect of the XML document. All types of documents (e.g. text and spreadsheet documents) use the same set of document and sub-document definitions. As a single XML document – also known as Flat XML or Uncompressed XML Files.
A basic package contains an XML file called [Content_Types].xml at the root, along with three directories: _rels, docProps, and a directory specific for the document type (for example, in a .docx word processing package, there would be a word directory). The word directory contains the document.xml file which is the core content of the document.
The binary transport format for an ODA-conformant file is called Open Document Interchange Format (ODIF) and is based on the Standard Generalized Markup Language and Abstract Syntax Notation One (ASN.1). One of the features of this standard could be stored or interchanged in one of three formats: Formatted, Formatted Processable, or Processable.
The Open Document Format for Office Applications (ODF), also known as OpenDocument, standardized as ISO 26300, is an open file format for word processing documents, spreadsheets, presentations and graphics and using ZIP-compressed [6] XML files. It was developed with the aim of providing an open, XML-based file format specification for office ...
In contrast, the newer Office Open XML formats support full document fidelity. Poor backward compatibility with the version of Word/Excel prior to the one in which they were introduced. For example, Word 2002 cannot open Word 2003 XML files unless a third-party converter add-in is installed. [2]
In 2000, Microsoft released an initial version of an XML-based format for Microsoft Excel, which was incorporated in Office XP. In 2002, a new file format for Microsoft Word followed. [9] The Excel and Word formats—known as the Microsoft Office XML formats—were later incorporated into the 2003 release of Microsoft Office.
Since October 2008, public authorities must be able to read text documents in ODF 1.0 format. [69] [70] Since July 2010, public authorities must be able to read text documents in ODF format up to version 1.2. Since March 2009, documents in ODF 1.0 format are allowed for use with the electronic signature and qualified electronic signature. [71] [72]
OpenDocument v1.2 was approved as an OASIS Committee Specification on 17 March 2011 and as an OASIS Standard on 29 September 2011. [10] [11] [12]It includes additional accessibility features, RDF-based metadata, [13] a spreadsheet formula specification based on OpenFormula, [13] support for digital signatures and some features suggested by the public.