A Policy Description Language

Apolicy describesprinciples or strategies for a plan of action designedto achieve a particular set of goals. We define a policy as a functionthat maps a series of events into a set of actions. In this paperweintroduceP~D£, a simplebut expressivelanguageto specify policies. The design of the languagehas beenstrongly influenced by the action languages of Geffner and Bonet (Geffner Boner1998)and Gelfondand Lifschitz (Gelfond&Lifschitz 1993) and the compositetemporal event language of Motakis and Zaniolo (Motakis &Zaniolo 1997). The semantics is founded on recent results on formal descriptions of action theories based on automata and their application to active databases. Wesummarize somecomplexity results on the hardness of evaluating polices and briefly describe the implementationof a policy server being used to provide centralized administration of a soft switch in a communication network.

Authors

• Jorge Lobo
• Randeep Bhatia
• Shamim Naqvi
• Bell Labs

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