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   schemas: why no local type bindings?

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  • From: james anderson <James.Anderson@mecomnet.de>
  • To: "xml-dev@ic.ac.uk" <xml-dev@ic.ac.uk>
  • Date: Thu, 06 Jan 2000 12:38:07 +0100

i'm working my way into schemas and found the distinction between anonymous
and names types baroque. i need to read further to see what named types can
mean, beyond that which the equivalent entity based definitions would have accomplished.

given, however, that they exist, why pray-tell would one then proscribe local
definitions? wouldn't there just as well be cases where such resemblances
would occur within elements as well as at a global level?

> > Finally, the last permutation:
> >
> > <element name="element1">
> >   <type name="type1">
> >     <element name="element2" type="string" />
> >   </type>
> > </element>
> >
> > is legal, and the type is referenceable by other elements, but is bad
> > form (IMHO).  If you have a type that will be used multiple times, put
> > it on its own (explicit type).  If it is only used once, use an implicit
> > type within the element definition.  Things like this are very
> > confusing.
> First real misunderstanding:  this is NOT allowed:  only top-level
> types can have names.  Again, the schema for schemas expresses this
> constraint.

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