xs:attributeGroup value restriction

Question

I have this xsd

<xs:attributeGroup name="PropertyAttributes">
    <xs:attribute name="IsAttached" type="xs:boolean" default="false" />
    <xs:attribute name="IsStatic" type="xs:boolean" default="false" />
  </xs:attributeGroup>

I like to restrict this case IsAttached=true IsStatic=true

How can I do this?

Answer 1

You cannot achieve this in XSD 1.0; you have to either move to XSD 1.1 (the only freely available processor that I know of is Xerces, and that is in beta status) OR augment your XSD 1.0 model with Schematron (the latter being XSLT 1.0/2.0 based, you have options galore).