摘要: XACML has emerged as a popular access control language on the Web, but because of its rich expressiveness, it proved difficult to analyze in an automated fashion. In this paper, we present formalization using description logics (DL), which are decidable fragment First-Order logic. This allows us cover more expressive subset than propositional logic-based analysis tools, and addition provide new service (policy redundancy). Also, mapping use off-the-shelf DL reasoners for tasks such policy comparison, verification querying. We empirical evaluation tool that was implemented top open source reasoner Pellet.