Simon St.Laurent simonstl at
Tue May 11 01:12:05 BST 1999

At 03:15 PM 5/10/99 -0500, Paul Prescod wrote:
>I am disappointed that the schema working group decided to extend SGML and
>XML's conflation of resource provision (entities) and document structure
>constraints. I would be glad to work on an XML instance-syntax resource
>provision specification if it would help you to split it off. I am already
>experimenting in that direction.

I agree with Paul 100% on this one.  For precisely this reason, DDML
remained entity free for a very long time (though I got outvoted on
unparsed entities in the end.) 

In my more recent project, XML Processing Description Language (XPDL), I've
separated constraints, entities, and attribute defaulting, and will be
adding notations to that list, from my list of parts.  (See for details on XPDL.)

Do we really need to specify content in the same place as constraints?  I
really hope not.

Simon St.Laurent
XML: A Primer / Building XML Applications (June)
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