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Re: Mixing schemaLocation and noNamespaceSchemaLocation?

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 12 Apr 2001 18:35:23 +0100
To: Ian Stokes-Rees <ijs@decisionsoft.com>
Cc: "Arnold, Curt" <Curt.Arnold@hyprotech.com>, "'xmlschema-dev@w3.org'" <xmlschema-dev@w3.org>
Message-ID: <f5bhezu9g2s.fsf@cogsci.ed.ac.uk>
Ian Stokes-Rees <ijs@decisionsoft.com> writes:

> > If you did this for namespace-less schema, then you really should allow it for namespaced-schemas for symetry.  I might have two schemas that each cover a separate partition of one namespace.
> 
> > However, trying to decide if two schemas are complementary or duplicative would be a pain.  I think the one namespace == one schema resource (in a document) is the best approach.  You could still partition your schemas, but you would have to create another schema that imported both BookCatalogue and Reviewer.
> 
> Isn't the proper way of thinking about this that there is only one
> schema per namespace and that there are multiple schema documents
> describing that namespace?

Since schemas and schema documents are all there are, and we
schema-validate _an_ instance with _a_ schema, it must be the case
that we may have more than one namespace per schema.   What I think
the useful summary is that in any case where multiple schema documents 
are used to describe a namespace, a single schema document which
<include>s them all should also be provides, so that instances and
other schema documents can use a single URI to identify them.

ht
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
Received on Thursday, 12 April 2001 13:35:41 GMT

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