Issue: Ambiguity in defn of <StatusCode>

<xs:element name="StatusCode" type="xacml:StatusCodeType"/>
    <xs:complexType name="StatusCodeType">
      <xs:sequence>
        <xs:element ref="xacml:StatusCode" minOccurs="0"/>
      </xs:sequence>
      <xs:attribute name="Value" type="xs:anyURI" use="required"/>
    </xs:complexType>