Re: XML Schema for XTM DTD

[Steve Pepper

> (2) To the extent that DTDs do not formally support all the constraints
>      required by XTM, should the XSD and RELAX-NG versions state those
>      constraints formally?
>      Some examples:
>       - the value of an xlink:href attribute must be a URI

Can do with XML Schema (datatype: "anyURI").  Since RNG can use the XML
Schema datatypes, I presume you can state it in RNG too.

>       - <topicRef> elements must reference <topic> elements
>

I think the only schema language for XML that could say that is Schematron.

Cheers,

Tom P