Microsoft's decision to add support to Office 2007 for the Open Document Format instead of its own OOXML office file format is due to backwards compatibility issues with OOXML, it has emerged.

When MS announced that SP2 for Office 2007 would support ODF and not OOXML, it suffered defeat at its own hands

Multi-trade International Corporation for Research of Office Software Open Format Technologies (MICROSOFT) has announced their surprise decision, that they cease to support OOXML document format (Office Open XML), acknowledging at the same time, that the ANSI-developed & supported TXT format will be a better, universal, solution.

Microsoft declared yesterday (May 21st, 2008) that Microsoft Office 2007 SP2 would include (among others such as PDF 1.5, PDF/A and some more) built-in support for OASIS OpenDocument Format version 1.1 (finalized, submitted to ISO, supported by OpenOffice.org, Kofffice, GNOME office apps and their forks) while ISO-submitted OOXML support would wait for Office 14.
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Like it or not, one of the most important features of any Microsoft Office alternative is being able to read Microsoft Office files.

Michael Brauer, the OpenOffice.org XML project lead and OASIS OpenDocument Technical Committee Chair, has written a blog entry about the progress of native Office Open XML (OOXML) import filter development for OpenOffice.org. Brauer explains the importance of supporting OOXML in OpenOffice.org and also describes some of the challenges associated with supporting an emerging document format.

Although Microsoft publicly testifies from every available pulpit of their deep longing for multiple document formats, a quick glance at reality shows that this love remains unrequited in their products. For example, what new formats does Office 2007 include out of the box?

" 28 August 2007: about 20 Microsoft partners appeared in the final minutes of yesterday's working meeting at SIS (Swedish Standards Institute) and pushed through a majority for a SIS approval of Microsoft's new OOXML file format as an ISO standard."

OpenOffice may support Microsoft's Office Open XML standard in future, but the organisation behind the open source productivity suite anticipates that everyone including Microsoft will have "difficulty" in making the format work.