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Quality-of-Service (QoS) performance guarantee for service-oriented systems (SOS) has become a critical problem. With the increasing number of offered services comes the challenge of efficiently building large-scale SOS to meet the required QoS criteria. Optimization of QoS-driven semantic Web service composition is known to be NP-hard. We address the(More)
Web service composition is to integrate existing web services to provide a compound service which satisfies specified requirement. However, traditional web service compositions fail to provide different compound services under various scenarios. In this paper, we propose an approach to compose services with context. A context ontology is defined to describe(More)
—We propose a service-oriented web application framework named iWeb, which enables web application adap-tive to both context and QoS. In iWeb, a context model is established and context information is collected systematically according to the context model. An innovative service selection approach based on context and QoS is proposed in the framework as the(More)
Web service search has been a serious concern for service-oriented software development. The challenge is how to find the right Web services efficiently and effectively for a given development task. There have been many efforts on developing techniques or systems to search services. Though effective in certain scenarios, existing techniques do not form(More)
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