Hi, All I have been working for Symphony's interoperability with MS Office for years, and I'm so glad to contribute to AOO's developement for this part. I just posted a document about WordprocessingML related, basic code structure for this part could be found.
http://wiki.services.openoffice.org/wiki/WordprocessingML Seeing your comments for this part, and hope we can discuss more about the AOO's interoperability improvements.