Microsoft Office 12 XML Format

I just became aware of Microsoft's paper espousing a similar style of 
xml documents as this group.

http://download.microsoft.com/download/E/3/D/E3DD6FED-0CC1-4788-A742-E1596179AE65/FileFormatsPreview.doc
http://download.microsoft.com/download/7/4/3/7437e747-aeaf-4419-8181-7307bae89db4/XMLFileFormatsGuide.doc

More:

http://www.microsoft.com/office/preview/default.mspx

Does anyone have knowledge of how similar this is to the work of this TC?

Duane