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use="prohibited"

From: Daplyn, Tim <Tim.Daplyn@eu.sony.com>
Date: Mon, 07 Jul 2003 14:49:56 -0600
Message-Id: <5.1.0.14.1.20030707144951.031b0ea0@localhost>
To: W3C XML Schema Comments list <www-xml-schema-comments@w3.org>




The recommendation includes a number of attribute declarations within
<restriction>s which have only 'name' and 'use' defined e.g.

	<xs:attribute name="form" use="prohibited"/>
	(in definition of topLevelAttribute)

Xerces seems to fail this type of redefinition with the following error:

   Message: Type of attribute {0} must be validly derived from type of
attribute in base

This seems to be based on the constraints section
http://www.w3.org/TR/xmlschema-1/#derivation-ok-restriction

Please does anyone have a definitive answer as to whether the following xml
is valid or not?

	<complexType name="typeB">
		<attribute name="attr" type="string" use="optional"/>
	</complexType>
	<complexType name="typeR">
		<complexContent>
			<restriction base="typeB">
				<attribute name="attr" use="prohibited"/>
				<!-- Do we _have_ to specify 'type' again?
-->
			</restriction>
		</complexContent>
	</complexType>

Thanks,
Tim Daplyn...


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Received on Monday, 7 July 2003 22:09:31 UTC

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