Hi,
the base rule for restriction seemingly is that the
derived type must in all possible instances validate
against its base type, which of course is not the case
with an additional attribute
hth
Wolfgang


--- Pete Cordell <petexmldev@t...>
wrote:

> 
> Hi Kai,
> 
> The schema snippet you present is illegal.  There
> are some cases when simple 
> types can restrict complex types (and possibly vice
> versa) but this isn't 
> one of them.
> 
> If you could say what you would like to do then
> perhaps someone can suggest 
> how to do it.
> 
> Cheers,
> 
> Pete Cordell
> Codalogic
> for XML Schema to C++ data binding visit
>  http://www.codalogic.com/lmx/
> ----- Original Message ----- 
> From: "Kai Schlamp" <schlamp@m...>
> To: <xmlschema-dev@w...>
> Sent: Thursday, November 01, 2007 2:25 AM
> Subject: Invalid: derivation of complex type by
> restriction of simple type 
> not allowed
> 
> 
> >
> > Hello!
> >
> > In my schema I have the following:
> >
> > <xs:complexType name="textareaType">
> >        <xs:simpleContent>
> >                <xs:restriction base="xs:string">
> >                        <xs:attribute ref="label"
> use="required" />
> >                </xs:restriction>
> >        </xs:simpleContent>
> > </xs:complexType>
> >
> > But W3C Schema validator tells me there is an
> error (derivation of
> > complex type by restriction of simple type not
> allowed), even if
> > w3schools writes, that this should be valid code
> (http://
> > www.w3schools.com/schema/schema_complex_text.asp).
> > I also checked the original Schema reference
> (http://www.w3.org/TR/
> > xmlschema-1/), that points out: "Note that either
> <restriction> or
> > <extension> must be chosen as the content of
> <simpleContent>."
> > When I replace restriction by extension everything
> works fine. But I
> > want to restrict the element type in a further
> step.
> > Any help?
> >
> > Best regards,
> > Kai
> >
> >
> >
> >
> >
> > 
> 
> 
> 
> 


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