Abstract
AbstractA semantic Web service automatic composition method based on discrete Event Calculus is proposed aiming at the issues of service AI planning composition such as large number of services and the confine of sequence composition process. Firstly, the extension of EC to DEC is present. Then the eight basic semantic Web service composition processes and their IOPE are modeled based on the actions, fluent and axioms of DEC. The service composition process is divided into two steps, abstract service planning and instance execution. And the service automatic composition framework is introduced. Also the abduction DEC planning method and semantic matching method of instance execution are given. The comparison indicate the superiority of this method: it solves the confine of sequence composition process of classic AI planning composition method with Event Calculus’ presentation of compound action, concurrent action, continuous action, knowledge of the agent and the predicate number of the DEC is much smaller than EC which speed the service discovering and composition.KeywordsSemantic web serviceAutomatic service compositionIntelligent planningDiscrete event calculusAbduction
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