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Subject: [xacml] Problem Statement for "Condition Reference"
This is a concrete problem statement for the XACML 1.1 work item titled "condition reference". The current XACML spec provides sufficient set of primitives for specifying conditional expressions. However, there is no way to refer to it. In other words, even if there is only one condition is needed in the system (e.g. access is allowed in weekday from 9 to 20) that is used in thousands of rules, the identical conditions must be specified in each rule repeatedly. If there is a way to group or catalogue condition expression in XACML and allows each rule to refer to, a rule specification becomes much more concise and it facilitates policy administration. In some sense, it is just like <PolicySetIdRefernece> and <PolicyIdReference>. Therefore, XACML schema definition should support some way to support condition reference. Michiharu Kudo
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