关键词: Web服务组装, 需求拆分, 服务选择, 异构消息转换, 中间模式

Abstract: To compose heterogeneous Web services distributed on Internet to a new service provided to customer, a user-oriented Web service composition method was proposed, which divided composition process into four phases, as division of user’s needs, selection of Web services, implementation of Web services composition and combination of the output of Web services composed. Also a composition schema-based method for user needs input and division, an effective QoS-based model for Web services selection, and a middle schema-based heterogeneous message transformation model were proposed. Finally, a Web service composition platform applied in logistic area was designed and implemented to show the feasibility and effectiveness of the methods above.

Key words: Web service composition, needs division, services selection, heterogeneous message transform, middle schema