Markup for image copyright/licensing

[Jonathan Lee <chorus@shaw.ca>]

Hello all,
  I'm wondering if someone can advise me what the best markup would be 
for including copyright information about an image. At the end of an 
article I'd like to create a list of all the images used within the 
document. I'd like to include a title, owner, thumbnail, license, and 
links to resources (for example, the original).

What I've got so far is:
---------------------------------------------------------------
<mediaobject>
    <info><copyright><year>2007</year><holder>Jonathan 
Lee</holder></copyright></info>
    <alt>Rubin's Vase</alt>
    <imageobject><imagedata fileref="../img/rubin.jpg"/></imageobject>
    <imageobject><imagedata fileref="../img/rubin_thumb.jpg"/></imageobject>
</mediaobject>
---------------------------------------------------------------

My problems as I see them:
    I'm using <alt> for the image title which feels wrong. <mediaobject> 
insists on using the titleforbidden variant of <info>.
    I'm not sure what to use for a license element. I'd like to link to 
a creative commons license, for example.
    I'd also link to the holder's home page.
    And a link to the original image (for example, from a page on Flickr)

What are the proper solutions for these problems?

Thanks
--Jonathan