How to expand an enumeration list

I would like to do something like:

  <xsd:simpleType name="aFewEnums">
    <xsd:restriction base="xsd:string" >
          <xsd:enumeration value="A"/>
          <xsd:enumeration value="B"/>
          <xsd:enumeration value="C"/>
    </xsd:restriction>
  </xsd:simpleType>
 
  <xsd:simpleType name="aFewMoreEnums">
    <xsd:extension base="aFewEnums" >
          <xsd:enumeration value="D"/>
          <xsd:enumeration value="E"/>
          <xsd:enumeration value="F"/>
    </xsd:extension>
  </xsd:simpleType>

But obviously the syntax of "extension" doesn't allow this.  How would
I do this so that "aFewMoreEnums" would allow any of the set
{A,B,C,D,E,F}, but in such a way that it allows everything in the set
of "aFewEnums" plus {D,E,F}?

Cheers,

Ian.                                                             
-- 
Ian Stokes-Rees                       DecisionSoft Ltd.
Telephone: +44-1865-203192            http://www.decisionsoft.com

Received on Tuesday, 15 May 2001 11:22:16 UTC