Research On P2P-based Semantic Web Service Discovery Model

Web service discovery is one of the burning questions in the area of web service research. It is the important component of web service system. However, the present main-steam web service discovery method is based on the service matchmaking within the UDDI framework, and because the UDDI register center can only offer the keyword-based inquiry, and cannot achieve the semantic matchmaking based on service function, a low rate of inquiry precision is resulted in. Furthermore, the present UDDI register model is a centralized architecture, so when the number of register services explodes, it will cause such problems as bottlenecks, single points of failure, and low inquiry efficiency, then the efficiency of web service discovery will be badly affected.For dealing with the aforementioned problems, the essay puts forward a P2P-based semantic web service discovery model named P2P-SWSDM.This model mainly includes two aspects as follow. First, in view of UDDI's lack of semantic-oriented support, this essay proposes that the present UDDI should be extended semantically, and the web service ontology based on OWL-S description needs to be mapped into the structure of UDDI. And then with the help of the semantic web service matching engine and the corresponding semantic matching algorithm, the process of web service discovery can truly achieve semantic matchmaking based on service function and next the rate of inquiry precision of web service can be fundamentally improved as well. In addition, to solve the problem of the centralized architecture of UDDI, this essay advocates that a semantic web service discovery model based on P2P environment should be built. Web service should be brought into P2P network so that the architecture of the network can be optimized and the efficiency of service discovery can also be improved by making full use of the merits of P2P network.