exclude-result-prefixes

<xs:attribute name="exclude-result-prefixes" use="optional">
  <xs:simpleType>
    <xs:union>
      <xs:simpleType>
        <xs:list itemType="ns-prefix"/>
      </xs:simpleType>
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value="#all"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:union>
  </xs:simpleType>
</xs:attribute>