MS and XMP/RDF

Seems MS is adding support for XMP to its Photo Gallery software:

<http://blogs.msdn.com/pix/archive/2006/08/16/702780.aspx>
<http://dannyayers.com/2006/08/24/windows-vista-to>

This got me thinking that if the primary use case for XMP is embedding 
RDF metadata in binary files, and if we took seriously our 
accessibility use case for describing these sorts of files in ways that 
say a screen-reader could use, it ought to be pretty simple to extract 
the XMP from the embedded image file and write it out in ODF metadata 
(assuming there might be some incompatibilities).

Bruce