problem with <restriction>

[mahanatti_net]

Greetings.

Below is the schema snippet I am trying to explore attributegroups and attribute's use property. However I am getting a validation error saying "undefined value for base encountered", pointing to <xs:restriction>. Please help.

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema elementFormDefault="qualified" attributeFormDefault="unqualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:attributeGroup name="grp">
<xs:attribute name="x" type="xs:string"/>
<xs:attribute name="y" type="xs:string"/>
<xs:attribute name="z" type="xs:string"/>
</xs:attributeGroup>
<xs:complexType name="A">
<xs:complexContent>
<xs:restriction base="xs:grp">
<xs:attribute name="x" use="required"/>
<xs:attribute name="y" use="prohibited"/>
<xs:attribute name="z" use="required"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:schema>

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[Zafar Abbas [MSFT]]

The attributeGroup does not belong to the xs namespace, rather than
targetnamespace of the schema (which is no namespace in this case). Just
remove the xs prefix in the reference to the attribute group and it should
work:

<xs:restriction base="grp">

"Mahalakshmi Natarajan" <ma***********@yahoo.co.uk> wrote in message
news:el*************@TK2MSFTNGP11.phx.gbl... Greetings.

Below is the schema snippet I am trying to explore attributegroups and attribute's use property. However I am getting a validation error saying
"undefined value for base encountered", pointing to <xs:restriction>. Please
help.
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema elementFormDefault="qualified" attributeFormDefault="unqualified"
xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:attributeGroup name="grp">
<xs:attribute name="x" type="xs:string"/>
<xs:attribute name="y" type="xs:string"/>
<xs:attribute name="z" type="xs:string"/>
</xs:attributeGroup>
<xs:complexType name="A">
<xs:complexContent>
<xs:restriction base="xs:grp">
<xs:attribute name="x" use="required"/>
<xs:attribute name="y" use="prohibited"/>
<xs:attribute name="z" use="required"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:schema>

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ASP.NET resources...