Re: Question about linking CSS to XML vocabularies

> should be included as well.  This would also serve to separate
> presentation-only attributes from any other attributes within the
> vocabulary, which I think would be a good thing.

id and class should not be used to encode presentation.  They
should be used to encode semantics and the style sheet should then
specify appropriate stylings for those semantics.  In particular
class="red" is a misuse of the class attribute in nearly every case.