Re: RE: Difficult logical relationship in complex type

Here is what I would do:

<xs:complexType>
  <xs:choice>
    <xs:choice>
      <xs:choice maxOccurs="unbounded">
        <xs:element ref="b"/>
        <xs:element ref="c"/>
        <xs:element ref="d"/>
      </xs:choice>
      <xs:element ref="a"/minOccurs="0" maxOccurs="unbounded"/>
    </xs:choice>
    <xs:choice maxOccurs="unbounded">
      <xs:element ref="b"/>
      <xs:element ref="c"/>
      <xs:element ref="d"/>
    </xs:choice>
  </xs:choice>
</xs:complexType>

Does that satisfy the requirements?  If that does not work please let me know what are the additional requirements I am sure I can find a way to make it work even if it does become a bit lengthy.

Austin
http://prettydiff.com/