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At 11/1/02 09:33 AM, Jonathan Robie wrote:
>I haven't been encountering many W3C XML Schemas that use substitution
>groups. Is this because I am dealing with an unrepresentative sample, or
>is this a feature that is not being widely used?
The XrML 2.1 core is virtually all abstract declarations, so any use of
this core means using substitution groups. It ultimately does this to
provide an architectural-forms like-mechanism: certain structures get
defined, and then you design others based on them but closer to your
particular application needs, and those are the ones you actually use.
Bob DuCharme www.snee.com/bob <bob@
snee.com> "The elements be kind to thee, and make thy
spirits all of comfort!" Anthony and Cleopatra, III ii
(bobdc e-mail address used only for mailing lists)