Policy Issuer using CombinerParameters

<PolicySet PolicySetId=ps1 PolicyCombiningAlgId=chain>
	<Target/>
	<PolicyCombinerParameters>
		<CombinerParameter ParameterName=Authority
                                  PolicyIdRef=policy-1>
			<AttributeValue DataType=.#string>
				Alice
			</AttrbuteValue>
		</PolicyCombinerParameter>
		<CombinerParameter ParameterName=Authority
                                  PolicyIdRef=policy-2>
			<AttributeValue DataType=.#string>
				Bob
			</AttrbuteValue>
		</PolicyCombinerParameter>
		<CombinerParameter ParameterName=Authority
                                  PolicyIdRef=policy-1>
			<AttributeValue DataType=.#string>
				Carol
			</AttrbuteValue>
		</PolicyCombinerParameter>
	</PolicyCombinerParameters>
	<PolicyIdRef>policy-1</PolicyIdRef>
	<PolicyIdRef>policy-2</PolicyIdRef>
	<PolicyIdRef>policy-3</PolicyIdRef>
	<PolicyIdRef>policy-4</PolicyIdRef>
	<PolicyIdRef>policy-5</PolicyIdRef>
</PolicySet>