<xs:complexType name="openAttrs" abstract="true" >
  <xs:annotation>
    <xs:documentation>
       This type is extended by almost all schema types
       to allow attributes from other namespaces to be
       added to user schemas.
     </xs:documentation>
  </xs:annotation>
  <xs:complexContent mixed="false">
    <xs:restriction base="xs:anyType">
      <xs:anyAttribute namespace="##other" processContents="lax"/>
    </xs:restriction>
  </xs:complexContent>
</xs:complexType>