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Klotz, Leigh wrote:
> I think it really *ought* to be easy to define a language that allows
> extensions from other namespaces, specifies where they are allowed, and
> maybe even lets you (the Schema author) say something about the extensions
> as substitution groups do, but without having to dance through the
> minefields of optional elements and sequence limitations. In my non-Xerox
> time I am trying to help design a language that allows for future
> extensibility, and finding the tools still a bit blunt (http://xdif.org).
Have you considered RELAX NG? It tries to do most of this. If it fails,
where does it fail?
Elliotte Rusty Harold email@example.com
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