This a rough out of the govia data type. I am not going to 
call it an xml because it is not. It is simply a format that
should be very easy to read. It could be very easy to complicate
the data storage format but that must be refrained from. 

This is only a first draft, but it does give a good starting 
point (IMHO).

<entry type=image>t
  <Information i18n=us>
    <original submitter='J. Random User' date=200101010000>
      <keywords>
        <!words and short search phrases seperated by commas>
        building, highrise, skyscraper, Tall building
      </keywords>
      <about>
        This is a brief (50-100 words) of what the media file is
        excluding author, date, and section(?)
      </description>
    </original>
    <modification submitter='S Other User' date=200201240149>
      <keywords>
        <!words and short search phrases seperated by commas>
        building, highrise, skyscraper, Tall building
      </keywords>
      <description>
        Changes are described here. and diff info on <about> would 
        be included here like this:
3
<It is a beutiful picture
===
>It is a nice picture
      </description>
    </modification>
    <about>
      A full description of the file that is at the descretion of the
      submitters. an example is:
It is a nice picture.
    </about>
  </information>
  <media format=png filesize=14k>
    <metric width=320 height=240>
      <!metric would also include time, bpp, muscial measure etc..., and>
    </metric>
    <file orginame=wto.png currentname=200201240149>
     Historical names would go here
    </file>
  </media>
</entry>