Proposal Announcement - XML DTDs to XML docs

Marcus Carr mrc at
Thu May 21 00:24:20 BST 1998

Simon St.Laurent wrote:

> What I'd like to see is a
> determined effort to map the 'weird stuff' to XML DTDs.  Note, for instance,
> that I kept the SGML-like content model in my examples.  It's sort of a
> half-way step, leaving in some of the old that the new may prosper.  As for
> parameter entities, I think they can be expressed as easily through the model
> I presented.

What about issues such as redefining a parameter entity in the external subset? Or
multiple identically named parameter entities within the DTD? These seem like
issues where you would either have to lose information from the DTD or define
behaviour for the XML DTD that doesn't apply to other XML documents. If that were
the case, I would question the benefit of the proposed syntax. Sticking with
parameter entities, what if the same entities behaved as a content model and an
attribute name? How and why would you make the distinction with the proposed

I think that the syntax that describes the structure of documents can validly be
different from the syntax that frames data because they're trying to accomplish
very different things.


Marcus Carr                  email:  mrc at
Allette Systems (Australia)  email:  info at
Level 10, 91 York Street     www:
Sydney 2000 NSW Australia    phone:  +61 2 9262 4777
                             fax:    +61 2 9262 4774

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