use="prohibited"

[The moderator apologizes for the delay; this should have gone to
the list some time ago but got list in the moderator's inbox.]

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 Thursday, 14 August 2003 08:47:02 UTC