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Research and Application of Dynamic Web Service Composition Based on Ontology

Author: LiYuZuo
Tutor: WangShuYi
School: Dalian University of Technology
Course: Computer Software and Theory
Keywords: Semantic Web Services Service Discovery Service portfolio OWL-S
CLC: TP393.09
Type: Master's thesis
Year: 2009
Downloads: 221
Quote: 1
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Abstract


Web services have mushroomed in recent years as a distributed computing model , able to achieve seamless interoperability between different platforms , different programming language applications or application components . With Web services standards improve and support Web services platform gradually mature , more and more services available on the network , more and more Web services - based applications , but existing services are mostly single and simple unable to meet the actual needs of the application , people often need to combine multiple Web services to accomplish a more complex task . The traditional client needed artificially select appropriate Web service , and then define the interaction between these Web services , and its hard-coded to complete Web service composition . However, due to the ever-growing number of Web services , manual service composition is unrealistic , and the quality of service can not be guaranteed . It must be a dynamic combination of Web services . Web services dynamic combination of program or agency automatically selected and assembled the appropriate Web services to complete the task , and can be described simply user task given at a high level on a regular format . This study is based on semantic Web services composition technology , according to the needs of users to a variety of existing Web services automatically combined , work together to complete the task of users , so that the service can be flexible to meet the needs of users , achieve \This paper proposed a combination of concept matching strategy based reasoning and semantic similarity calculation , and gives service matching rules and algorithms . Followed by a reverse match service composition algorithm , and then given the dynamic execution service portfolio and exception handling mechanism . Finally, design and partial implementation of a dynamic Web service composition model experiment with domain ontology and service ontology , it can be seen from the experimental results , the model can be correct , in a short period of time according to the user's input and output combination of a portfolio of services to meet user requirements .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > The application of computer network
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