Semantic QoS Model for Extended IOPE Matching and Composition of Web Services

UDDI and WSDL do not provide sufficient grounds to find appropriate Web services at the required accuracy and quality of service (QoS) level by the consumer. This article discusses a semantic search agent (SSA) approach that discovers appropriate Web services according to semantic description. The descriptions comprise QoS requirements and input/output information of fetched Web services according to consumer requirements. This study considers a broker or dispatcher model which consists of a QoS broker-based scheme by a multi-class queuing model. We depicted a new system that is an extension of the SSA to find appropriate Web services according to consumer request based on matching of input/output and QoS information of Web services; then compose them according to consumer requirements through semantic Web and ontology.