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March 15, 2008


Thomas Bandholtz

While the SML/Schematron approach may be a reasonable enhancement of expressiveness for XSD constraints, just adding a "feather duster for the corners of your schema" (Rick Jelliffe himself) does not make a Service Modeling Language deserving such a challenging label. Surely a schema is kind of a model, but a model is more than a schema (even one with brushed corners).


Has there been much discussion about beefing up XML Schema's relational support (ie. better support for inter-document relationships as a first class citizen)? Using xs:anyURIs or whatever is ok, until you start needing typed relationships.

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