Brethren

What's a smart way of annotating the meta-info in a DTD? And what CPAN modules should I use – if any?

I've got XML records for a code-inspection. They are spec'ed in a DTD. The DTD says, for instance, that

• Each Feature/Defect has
  • an ID (as an attribute), plus
  • multiple Inspections.
• Each inspection has
  • a date (as an attribute),
  • one or more reviewers, (as entities)
  • one or more files. (as entities)

And so on. I want to store annotations that assert presentation data for an editing GUI like:

• 'date' should be
  • Presented as 'Date:'
  • Editable only by the Lead inspector
  • Default to the GMT date, not the local-time date.
• 'inspector' should be
  • presented as a popup menu from a list of qualified users via a call to LDAP

Clearly, this info doesn't belong in the DTD or the XML file. I'm currently storing it an ugly HoH that I grew myself. I suspect I'm re-inventing the wheel, here. But my Super Searching and my CPAN searching didn't turn up anything. Except a ref to Xforms which looks like it will be what I need, someday in the future. Am I using the wrong keywords to search?

BTW, I'd convert from DTD to another form like XML-Schema or RelaxNG if that would help. But, near as I can tell, they don't separate the specification of the data from the specification of the presentation/editing of the data, either.

thanks
throop