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To evaluate such a requirement against a user request, we have to document those fine grained details in of the requirement. These documents are called Polices. XACML is used to document this type of policies. We can evaluate a user's requirements against these XACML policies using an XACML engine. WSO2 Identity Server can be used for this purpose. WSO2 IS has an XACML Policy Engine where users can evaluate their requests and it provides many functionalities related to XACML Authorization.
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