XACML policy based on resource giving result as NotApplicable

Question

I am creating simple policy and the format is like

<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="ResourcePolicy" RuleCombiningAlgId="urn:oasis:names:tc:xacml:1.0:rule-combining-algorithm:first-applicable" Version="1.0">
   <Target>
      <AnyOf>
         <AllOf>
            <Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
               <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">images</AttributeValue>
               <AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
            </Match>
         </AllOf>
      </AnyOf>
   </Target>
   <Rule Effect="Permit" RuleId="Rule-1">
      <Condition>
         <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
            <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
               <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
                  <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
                  <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
                  <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">delete</AttributeValue>
               </Apply>
               <AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
            </Apply>
            <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:any-of">
               <Function FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal"/>
               <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">admin</AttributeValue>
               <AttributeDesignator AttributeId="http://wso2.org/claims/role" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
            </Apply>
         </Apply>
      </Condition>
   </Rule>
   <Rule Effect="Permit" RuleId="Rule-2">
      <Target>
         <AnyOf>
            <AllOf>
               <Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
                  <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">blue.jpg</AttributeValue>
                  <AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
               </Match>
            </AllOf>
         </AnyOf>
         <AnyOf>
            <AllOf>
               <Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
                  <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
                  <AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
               </Match>
            </AllOf>
         </AnyOf>
      </Target>
      <Condition>
         <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:any-of">
            <Function FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal"/>
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">emp</AttributeValue>
            <AttributeDesignator AttributeId="http://wso2.org/claims/role" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
         </Apply>
      </Condition>
   </Rule>
   <Rule Effect="Deny" RuleId="Deny-Rule"/>
</Policy>        `

when I am creating a request to the resource blue.jpg so that emp can read the resource blue.jpg the result is not applicable what's wrong in the policy or is their something i missed out in request.

<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="true">
    <Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
        <Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
        </Attribute>
    </Attributes>
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
        <Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">emp</AttributeValue>
        </Attribute>
    </Attributes>
    <Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
        <Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">blue.jpg</AttributeValue>
        </Attribute>
    </Attributes>
</Request>

Answer 1

I guess you are trying policy with WSO2IS. According to policy, It is applicable to "images" resource. You have defined it with target element. But in your request, you are not sending "images"? Therefore policy would not be applicable to this request and there are no other policies in the server that applicable to request, If you want to send a request that would return "permit" according to the your policy, Please try out following request. Here you are sending both "images" and "blue.jpg" a values and modify the attribute id of the subject category.

<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
    <Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
        <Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
        </Attribute>
    </Attributes>
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
        <Attribute AttributeId="http://wso2.org/claims/role" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">emp</AttributeValue>
        </Attribute>
    </Attributes>
    <Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
        <Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">images</AttributeValue>
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">blue.jpg</AttributeValue>
        </Attribute>
    </Attributes>
</Request> 

Answer 2

Regarding your question about action READ and action WRITE, it looks like you are trying to make use of the Multiple Decision Profile (MDP) feature of XACML where you can ask multiple questions in a single XACML request like

<Request>
<Question1>
  action=read
  resource=r1
</Question1>

<Question2>
  action=write
  resource=r1
</Question2>

</Request>

I am not sure whether WSO2 supports MDP.