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Research on Technology of Services Composition and Matching Algorithm on the Basis of Semantic Web Services

Author: LangDaWei
Tutor: ZhangXianChao
School: Dalian University of Technology
Course: Software Engineering
Keywords: Service portfolio Service Matching Semantics Web services Noumenon
CLC: TP393.092
Type: Master's thesis
Year: 2006
Downloads: 545
Quote: 3
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Abstract


With the rapid development of Web services , more and more of the organizational structure will be the introduction of their business processes, Web services , traditional workflow system is no longer able to meet the needs of business integration , a new generation of workflow systems must support for Web services integration. Integrated Web services as Web services workflow system must address some important issues , including : Web service discovery , service quality management , Web services and heterogeneous Web services work stream task semantic integration . Semantic Web and Web services are two important trends in the development of the WWW , the combination of these two technologies produce another emerging research topic - Semantic Web Services . Semantic Web Services Semantic Web markup language to describe the semantic Web services to become a computer can understand the entity to support services automatic discovery, execution and combination . This study is based on the excavation and automatic composition of Semantic Web services , the goal is to make the agent software to find out the most appropriate Web services according to the needs of users or to a variety of existing Web services automatically combined into a new Web service , so that it can be flexible to meet the needs of users , \Design a dynamic service composition based on semantic Web services discovery agent system DSCDBroker (Dynamic Services Composition and Discovery Broker), can help to achieve this goal in large part . DSCDBroker provides three services : registration services , discovery services and combinations of services . Agent prototype system , this paper first defines the Web Services Description Language support dynamic service portfolio QWSML ( Quality -based Web Service Markup Language ) . Second , Web services discovery mechanism for how to find the best services to do an in-depth discussion, mainly based the UDDI expansion services semantic information from syntax , QoS ( Quality of Service ) metrics and semantic Web match and find services in order to improve the accuracy of the service description and discovery . Again, the portfolio of services and resources through the introduction of dynamic service composition mechanism , combined with the service application ontology library dynamic binding . Finally , this paper presents the integrated solution with the existing logistics system CTISS (Container Train Info Service System) .

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