| 摘要 |
<p>There are provided a role information storing unit (11) that stores role information including information indicative of subject sets, and information capable of specifying inclusion relationships between subject sets, a policy description storing unit (12) that stores policy descriptions including information indicative or policies and information for identifying subject sets to which the policies are to be applied, a policy stratifying unit (13) that generates a policy hierarchy in which two or more policies are stratified based on inclusion relationships between subject sets to which each policy is applied, and a policy ordering unit (14) that totally orders policy sets made of the two or more policies to be totally ordered based on information indicative of the policy hierarchy while maintaining a higher/lower relationship in a hierarchy.</p> |
