Study of XACML Policy Based on Description Logic

Against the semantics of XML Access Control Markup Language(XACML) policies,conflict and other issues,this paper provides description logic-based formal methods,formalizes XACML policy target,rules,rules combination algorithms and policy conflict resolution algorithm,and puts forward the rules conflict detection method based on the description logic.Analysis result shows that this method facilitates strategic expansion,and enhances the XACML semantics of expressive power and reasoning ability.