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- From: "Rick Jelliffe" <ricko@allette.com.au>
- To: "'XML Dev'" <xml-dev@ic.ac.uk>
- Date: Thu, 22 Jul 1999 02:41:13 +0800
From: John E. Simpson <simpson@polaris.net>
>So (acknowledging that you mean it to apply only to XML schemas, and
that
>the following examples don't conform to legitimate XML DTD syntax)
you're
>suggesting element content models such as:
>
> <!ELEMENT king SINGLE >
>
>(The king element may contain any other single element)
Good examples.
> <!ELEMENT hands PAIR >
>
>(The hands element may contain any *pair* of other elements)
>
> <ELEMENT citizens UNIQUE >
>
>(The citizens element may contain any number of child elements, but
each
>child may appear only once within the citizens element)
Or maybe these could be split into SET and BAG in RDF fashion.
>Like that? These would all be subtypes of ANY, no?
If you like subtyping, sure. If you like extensibility, then I suppose
they
are extensions of EMPTY.
Rick Jelliffe
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