Achieving Openness: a closer look at ODF & OOXML

"An open, XML-based standard for displaying and storing data files (text documents, spreadsheets, and presentations) offers a new and promising approach to data storage and document exchange among office applications. A comparison of the two XML-based formats – OpenDocument Format (“ODF”) and Office Open XML (“OOXML”) – across widely accepted “openness” criteria has revealed substantial differences"

http://fussnotes.typepad.com/Achieving_Openness_1point0.html