Re: Quick technical question.

Michael Anderson <michael@research.canon.com.au> writes:

> Hi all,
> Does someone understand clause 1.6 of
> http://www.w3.org/TR/xmlschema-1/#rcase-NameAndTypeOK ?
> 
> "R's { type definition } is validly derived given {extension } from B's
> {type definition} as defined by Type Derivation OK (Complex)(5.11) or
> Type Derivation OK(Simple)(5.12) as appropriate".

This means that the derivation can't involve {extension} -- it's as if 
B had had block='extension'.  The point is that to derive by
restriction, the type derivation path can't involve extension.

ht
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
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