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Re: Why No Abstract on SimplyType?

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 11 Nov 2002 10:50:49 +0000
To: Neil Bradley <neil.bradley@rubus.com>
Cc: "'xmlschema-dev@w3.org'" <xmlschema-dev@w3.org>
Message-ID: <f5b65v44bxy.fsf@erasmus.inf.ed.ac.uk>

Neil Bradley <neil.bradley@rubus.com> writes:

> The Abstract attribute may be used on the ComplexType element. But it cannot
> be used on the SimpleType element. Why?
> 
> I had thought it might be to reinforce a rule that abstract types cannot be
> based on concrete types, yet this is actually possible with complex types.

I can't reconstruct the original arguments against this, but there
were some.  It's under discussion as a possible 1.1 feature.

ht
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, 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/
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Received on Monday, 11 November 2002 05:50:50 GMT

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