- From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
- Date: 25 Oct 2001 09:20:52 +0100
- To: sandygao@ca.ibm.com
- Cc: www-xml-schema-comments@w3.org, xmlschema-dev@w3.org
sandygao@ca.ibm.com writes:
> Further on this topic:
>
> 1. If schema document A includes B, and B includes C. Does A have access to
> components in C? And does C have access to A?
The phrase 'have access' is possibly misleading. Any schema document
can legally contain a reference to any name in its own target
namespace. It can only contain references to names in other
namespaces if it contains <import>s for those namespaces. So the
following is _not_ valid, regardless of whether it's
chameleon-included by a schema with target namespace of 'urn:xyzzy' or
not:
<xs:schema xmlns:x="urn:xyzzy">
<xs:element name="foo" type="x:baz"/>
</xs:schema>
The question of whether references are satisfied is a matter which can
only be addressed at runtime, once the complete set of available
components and their names is known.
> I think the answer is yes, according to your explanation below.
So indeed in your example, references in C may be satisfied by
components declared in A.
> 2. If schema document A includes B, and B *imports* C. Does A have access
> to components in C?
See above -- no.
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, 25 October 2001 04:20:06 UTC