Would you pls explain what you mean be tokenized... Using Complextype instead 
of Attributegroup works.

-Maha.

"Han" wrote:

> Nice. The example seems to be tokenized one. Anyway, can be misleading. 
> Simply replace the <attributeGroud> with <complexType>. This seems to work 
> for me.
> 
> <xs:schema
>  xmlns:xs="http://www.w3.org/2001/XMLSchema"
>  elementFormDefault="qualified"
> >
> 
> <xs:complexType name="A">
>   <xs:attribute name="x"/>
>   <xs:attribute name="y"/>
>  </xs:complexType>
> 
> <xs:complexType name="B">
>   <xs:complexContent>
>    <xs:restriction base="A">
>     <xs:attribute name="x" use="required" />
>     <xs:attribute name="y" use="prohibited"/>
>    </xs:restriction>
>   </xs:complexContent>
>  </xs:complexType>
> 
> <xs:element name='a' type='B'/>
> 
> </xs:schema>
> 
> "Mahalax" <Mahalax@d...> wrote in message 
> news:2E16A199-7E18-4CA8-999F-FCE336D365C8@m......
> > Here is the link:
> >
> > http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xsdrefattributeelement.asp
> >
> > "Han" wrote:
> >
> >> Interesting example. As I read MSDN, only the name of a complexType is
> >> allowed.
> >>
> >> (Excerpt)
> >>
> >> restriction (complexContent)
> >>
> >> base
> >> The name of a complexType element defined in this schema (or another 
> >> schema
> >> indicated by the specified namespace). The element containing the
> >> restriction element is derived from the type specified by the base value.
> >>
> >> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xsdrefrestrictioncomplexContentElement.asp
> >>
> >> Do you happened to have a link of the example?
> >>
> >> "Mahalax" <Mahalax@d...> wrote in message
> >> news:796D6E29-A336-48B7-92B9-CA8C6F73F8CD@m......
> >> > Yes, it does. Here is the MSDN sample.
> >> >
> >> > <xs:attributeGroup name="A">
> >> >  <xs:attribute name="x" type="xs:NCName"/>
> >> >  <xs:attribute name="y" type="xs:QName"/>
> >> > </xs:attributeGroup>
> >> >
> >> > <xs:complexType name="B">
> >> >  <xs:complexContent>
> >> >   <xs:restriction base="xs:A">
> >> >    <xs:attribute name="x" use="required" />
> >> >    <xs:attribute name="y" use="prohibited"/>
> >> >   </xs:restriction>
> >> >  </xs:complexContent>
> >> > </xs:complexType>
> >> >
> >> > -Maha
> >> >
> >> > "Han" wrote:
> >> >
> >> >> I mean reuse. I mean @use attribute at reused attributeGroup.
> >> >> By the way, does MSDN example use name of an attributeGroup for its 
> >> >> @base
> >> >> attribute?
> >> >>
> >> >> "Mahalax" <Mahalax@d...> wrote in message
> >> >> news:CE54F817-01C7-487C-B277-F8245F2E0531@m......
> >> >> > Hi Han,
> >> >> >
> >> >> > Actually I am trying to explore the attributegroup and its purpose.
> >> >> > Many
> >> >> > of
> >> >> > my schemas have a set of common atributes which I am trying to 
> >> >> > declare
> >> >> > commonly and reuse as required. The code I have posted is an 
> >> >> > adaptation
> >> >> > from
> >> >> > MSDN which is not working.
> >> >> >
> >> >> > "Han" wrote:
> >> >> >
> >> >> >> OOPS, I mean @use by @required in the earlier post. Values are,
> >> >> >>
> >> >> >> optional, prohibited, required
> >> >> >>
> >> >> >> "Mahalax" <Mahalax@d...> wrote in message
> >> >> >> news:207B477E-4686-4015-8CFE-A510B3AEBE6B@m......
> >> >> >> > 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>
> >> >> >> >
> >> >> >> > Best Regards,
> >> >> >> > Mahalakshmi Natarajan
> >> >> >> > http://mahalax.blogspot.com
> >> >> >> > http://dotnetjunkies.com/weblog/mahalax
> >> >> >>
> >> >> >>
> >> >>
> >> >>
> >>
> >> 
> 
>