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Quality-of-Service (QoS) is widely employed for describing non-functional characteristics of Web services. Web Service selection and evolution is receiving huge interest in the service oriented architecture community due to dynamic and volatile web service environment. The automatic selection and composition of Web services rely strongly on the manner to deal with ambiguity inherent to the description...
Web services (WSs) can cooperate with each other to provide more valuable WSs. Current approaches for WS cooperation have typically assumed that WSs are always willing to participate in some form of cooperation, and have undermined the fact that WSs are autonomous in this open environment. This assumption, however, becomes more problematic in community-based WS cooperation due to the dynamic nature...
Reputation is useful for establishing trust between Web service (WS) providers and WS consumers. In the context of WS composition, a challenging issue of reputation management is to propagate a user's impression of a composite WS (i.e., the user's feedback rating) to its component WSs. In this paper, we propose a Shapley value based approach which can achieve fair impression propagation, that is,...
As more and more functionally similar Web Services from providers with different Quality of Service (QoS) are available on the Web, a selection needs to be made to determine which services are to participate in a given composite service. Moreover, QoS becomes one of the most important factors for Web Service selection. Indeed, one of the main assets of service-orientation is composition to develop...
Service recommendation in a Web of services with uncertain QoS is a challenging problem. In this paper, we propose a reputation-based service recommendation framework. We formally define a service reputation model that analyzes the relations between uncertain QoS and reputation. We also devise a two-phase planning approach to constructing a composite service as the recommendation when none of existing...
Automatic dynamic web service composition is showing to be an effective way how to deal with the dynamic character of the web services and business environment, while providing a mechanism supplying varying user goals. This paper briefly introduces the undesired service execution effects influencing the service composition and achievement of the user goal. We discuss a solution eliminating the undesired...
With the spread of Internet technologies, the severe competition among businesses, many organizations are moving towards integrating their services online. Service Oriented Architecture (SOA) has shown a potential features in facilitating and managing services integration and expose them through a Portal application. The marriage of these two new standards will definitely lead to a full fledge service...
Requesters invoke web services to accomplish complicated functions. A complicated function should be decomposed into sub-functions, in which each sub-function can be accomplished by a web service. After that, web services are selected to compose a path to accomplish the complicated function. When composing web service paths, secure access of web services should be considered. Current web service access...
Web Services become more prevalent in Internet or Intranet environments, bringing many new design challenges, due to stringent requirements such as reliability, scalability, efficiency, security, reusability, adaptability, interoperability, maintainability, availability, portability, etc. Although some of them has been gotten a lot of concerns in present research works, but the availability in composite...
The process of semantic Web service composition arranges several Web services into one composite service to realize complex workflows with an exploitation of semantics. This paper proposes a framework to automatic semantic Web service composition. Its advantage is that a huge amount of computation is performed during preprocessing and the composition approach is designed to exploit the parallel execution...
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