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derivation in WXS
- To: <xml-dev@l...>
- Subject: derivation in WXS
- From: "Jeff Greif" <jgreif@a...>
- Date: Wed, 20 Nov 2002 21:24:08 -0800
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I was unable to determine the answers to these
questions by reading the 'Structures' part of XML Schema, http://www.w3.org/TR/xmlschema-1
1. Given types B, E, and R where E is an
extension of B, and R is a restriction of E, is R a restriction or extension of
B, or neither?
2. Similarly, given B, E, and R where R is a
restriction of B and E is an extension of R, is E a restriction or
extension of B or neither?
3. For the most derived type in each chain (R in
the first and E in the second), when is it allowed and when prohibited by
{prohibited substitutions} on B?
4. For the most derived type in each chain
(R in the first and E in the second), when is it allowed and when prohibited by
{disallowed substitutions} on some element declared to have type B? That
is, with what values of {disallowed substitions} will such an element validate
with an xsi:type of R and E respectively, and with what values will it not
validate?
Jeff
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