<xs:simpleType name="type__on_off">

     <xs:restriction base="xs:token">

         <xs:enumeration value="on" />

         <xs:enumeration value="off" />

     </xs:restriction>

</xs:simpleType>



  <xs:simpleType name="newType">

    <xs:restriction base="xs:token">

      <xs:enumeration value="none" />

      <xs:enumeration value="hidden" />

      <xs:enumeration value="top" />

      <xs:enumeration value="bottom" />

    </xs:restriction>

  </xs:simpleType>



<xs:complexType name="type_errors">

  <xs:simpleContent>

    <xs:extension base="newType">

      <xs:attribute name="stack" type="type__on_off" use="optional" 
default="off" />

    </xs:extension>

  </xs:simpleContent>

 </xs:complexType>




-- 
Stan Kitsis
Program Manager, XML Technologies
Microsoft Corporation

This posting is provided "AS IS" with no warranties, and confers no rights. 
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"Lüpher Cypher" <lupher.cypher@v...> wrote in message 
news:im3uf.3254$tJ1.916@trndny01...
> Hi,
> I need to define an element which can take on predefined values and has an 
> optional attribute.
>
> <xs:simpleType name="type__on_off">
>     <xs:restriction base="xs:token">
>         <xs:enumeration value="on" />
>         <xs:enumeration value="off" />
>     </xs:restriction>
> </xs:simpleType>
>
> <xs:complexType name="type_errors">
>     <xs:simpleContent>
>         <xs:restriction base="xs:token">
>             <xs:enumeration value="none" />
>             <xs:enumeration value="hidden" />
>             <xs:enumeration value="top" />
>             <xs:enumeration value="bottom" />
>             <xs:attribute name="stack" type="type__on_off" use="optional" 
> default="off" />
>         </xs:restriction>
>     </xs:simpleContent>
> </xs:complexType>
>
> This gives me a validation error "XMLSchema:string is used as a base for 
> complex type restriction".
>
> What am I doing wrong?
>
> Thanks!
>
>
> -- 
>
> - lüpher
> ---------------------------------------------
> "Man sieht nur das, was man weiß" (Goethe)