Importing XMP data with SemWeb

[Warren Baird <photogeekmtl gmail com>]

Hi all,

I've been looking into how to get XMP importing working - specifically 
for Category/Tag values.

I looked at the XMP writing code in JpegHeader, and all it's doing is 
adding an anonymous bag containing the Category/Tag names as strings. 
   I've only done a bit of reading on XMP so far --- is this really the 
best way to store Category/Tag data?   Is that the format I should look 
for when importing?  It seems overly general to just assume that any 
rdf::Bag structure I find contains category names.  Is their a standard 
XMP namespace for storing this kind of information that we should use?

While I'm asking silly questions - is there any way to get at the 
hierarchical structure of an XMP file via the semweb code?  I've taken a 
quick look through the semweb docs and haven't seen anything --- 
everything I find seems to walk through statements as if it was a flat 
list.   What I'd like to do is find the bag containing the category 
information and then walk through it's children specifically.    some 
kind of DOM-like access to the data would be best...

Thanks,

Warren