The document discusses Office Open XML, the file format used in Microsoft Office 2007. It provides an overview of OOXML, including its structure as a zip file containing XML files for different content types like documents, spreadsheets, presentations. It also discusses OpenOffice.org's implementation of an OOXML importer through a native filter being developed jointly with Novell. The filter uses a fast SAX parser and works within OpenOffice.org's data model to handle the different OOXML document types.