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Re: (Clarification on xsi:type) was Re: Simplifying XML Schema

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 10 Jun 2000 12:38:37 +0100
To: Rick JELLIFFE <ricko@geotempo.com>
Cc: www-xml-schema-comments@w3.org
Message-ID: <f5br9a5dav6.fsf@cogsci.ed.ac.uk>
Rick JELLIFFE <ricko@geotempo.com> writes:

> > From: Henry S. Thompson (ht@cogsci.ed.ac.uk)
>  
> > That's fine, you don't need any new features then:  use
> > <any processContents='strict' minOccurs='0' maxOccurs='unbounded'/>
> > and xsi:type in the instances and you'll have (nearly) everything you
> > want.
>  
> Just for general clarification, is it possible to have an attribute
> (xsi:type or something derived from it somehow) which allows type
> selection from an attribute, but constrained to certain choices?  

Not as currently spec'ed.  You are specifically forbidden from
declaring the 'type' attribute in the
'http://www.w3.org/1999/XMLSchema-instance' namespace in any schema,
and deriving something from it or its type would not be recognised as
having any special meaning.

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 Saturday, 10 June 2000 07:38:40 UTC

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