[xacml] [CR] Schema change of AttributeSelector

I propose to change the AttributeSelector element. The reason of this
change is described in a separate mail titled "[xacml] AttributeSelector
example".

(1) Schema change request
<xs:complexType name="AttributeSelectorType">
  <xs:attribute name="RequestContextPath" type="xs:anyURI" use="required"/>
  <xs:attribute name="DataType" type="xs:anyURI" use="required"/>
  <xs:attribute name="XPathVersion" type="xs:anyURI" use="optional" default
="http://www.w3.org/TR/1999/Rec-xpath-19991116"/>
</xs:complexType>

==>

<xs:complexType name="AttributeSelectorType">
  <xs:element ref="xacml:XPathNamespace" minOccurs="0"/>
  <xs:choice>
    <xs:attribute name="RequestContextPath" type="xs:anyURI" use
="optional"/>
    <xs:attribute name="RequestContextId" type="xs:string" use="optional"/>
  </xs:choice>
  <xs:attribute name="DataType" type="xs:anyURI" use="optional"/>
  <xs:attribute name="XPathVersion" type="xs:anyURI" use="optional" default
="http://www.w3.org/TR/1999/Rec-xpath-19991116"/>
</xs:complexType>

(Definition of XPathNamespace element is posted in separate mail titled
"[xacml] [CR] Schema change of Defaults element")

Michiharu Kudo

IBM Tokyo Research Laboratory, Internet Technology
Tel. +81 (46) 215-4642   Fax +81 (46) 273-7428