OpenXML
From Apache OpenOffice Wiki
OpenXML is the Microsoft Office 2007 XML based file format that has been published as ECMA-376.
There are plans to support this file format in OpenOffice.org for interoperate with Microsoft Office 2007
There are 3 major types of files
There is some code in the oox module (OOX) from the Xml project. The CWS is xmlfilter02 in SRC680. (view the workspace on EIS)
Implementation Generalities
The whole OOX filter makes use of the new FastParser service to implement an event driven SAX parser.