action-45

Hello,
I got reply from Sony Ericsson regarding their use of XMP. 
Currently they use XMP for image metadata, they store geo-tagging-info (cell info) and they use EXIF for gps-info.

<x:xmpmeta xmlns:x="adobe:ns:meta/">
  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <rdf:Description rdf:about=" " xmlns:cell="http://developer.sonyericsson.com/cell/1.0/">
      <cell:mcc>240</cell:mcc>
      <cell:mnc>1</cell:mnc>
      <cell:lac>5015</cell:lac>
      <cell:cellid>60310</cell:cellid>
      <cell:r>3</cell:r>
      <cell:cgi>240-1-5015-60310</cell:cgi>
    </rdf:Description>
  </rdf:RDF>
</x:xmpmeta>

And the tags for "Favourites" that can be associated with an image
 
<x:xmpmeta xmlns:x="adobe:ns:meta/">
  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <rdf:Description rdf:about=" " xmlns:dc="http://purl.org/dc/elements/1.1/">
      <dc:subject>
        <rdf:Bag>
          <rdf:li>Favourites</rdf:li>
        </rdf:Bag>
      </dc:subject>
    </rdf:Description>
  </rdf:RDF>
</x:xmpmeta>

They don't use xmp:CreateDate t ex since that is available in the Exif-section
In general one can say that they only use XMP for the properties that can not be found in Exif!

/J