A Four-Level Matching Model for Semantic Web Service Selection Based on QoS Ontology

Services discovery based on syntactic matching cannot adapt to the open and dynamic environment of the web. In order to realize service selection for supporting QoS constraints, a Four-Level Matching Model for Semantic Web Service based on QoS Ontology and the QoS ontology for web service are presented. The Matching Engine works with the concepts of domain ontology and QoS ontology, it executes Application Domain Matching, Description Matching of Service, Function Matching of Service, QoS Matching in sequence for describing the user's service request and registered service advertising which could be interpreted under ontology, because they provide a formal and semantic specification of conceptualization for improveing efficiency and accuracy of services selection.