Dia & Schemas/DTDs

["Durk Strooisma" <durk kern nl>]

Hi,

We noticed that Dia doens't make use of DTDs or XML Schemas (for example to
validate Dia XML documents). Even correct DTDs or XML Schemas aren't
provided, which would be handy to validate Dia XML documents within XML
authoring tools.

Probably there's a good reason doing it the way the Dia-people do right now.
Performance? Complexity?

For us it would be very pleasent if Dia uses DTDs or Schemas for extending
the program's functionality. Of course extending a DTD or Schema needs to be
supported in the program itself too. But when implemented, functionality can
be extending without modifying source code.
Example: it would be very nice to be able to add more attributes to shapes.
The existing shape attributes (like "name" and "textbox") don't offer the
ability to create shapes for network diagrams like "computer" with
attributes like IP and MAC-address.

Maybe that's a good idea to consider...

Durk