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Research of the Web Service Composition Approach for Building E-learning Environment

Author: XiePan
Tutor: ZhouDongZuo
School: Northeast Normal University
Course: Computer Software and Theory
Keywords: Web services Service portfolio The digitized learning support software integration Digital Learning Domain Ontology QOS body
CLC: TP311.52
Type: Master's thesis
Year: 2009
Downloads: 158
Quote: 1
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Abstract


With the popularity of digital education , learning support software, there are many data on the Internet , However, due to these different software development platforms , development languages ??and database , increased integration difficulty . The emergence of Web services makes application integration across the platform and other restrictions , provides a viable solution to solve the heterogeneous digital learning support software integration by combining existing services according to certain logical order , you can quickly build new digital learning environment. Nowadays, however, the existing portfolio of services programs either lack the service semantic information , so that the computer can not be a good understanding of service , either purely from the point of view of the function off to a combination of services , rarely considered non-functional attributes of the service , yet kinds of effective combination method , therefore , the paper proposes a service composition model constructed based the body oriented digital learning support software to automatically match , discovery , composition and invocation of Web services , better support digital learning software integration. In this paper, the Semantic Web and Web services technology , based ontology -oriented the digitized learning support environment to build the portfolio of services , this method can effectively solve the heterogeneity in Digital Learning support software integration , according to the service consumer the business needs a dynamic combination of service . In this method , the use of digital learning field ontology ontology library extended semantic description of services and use of ontology reasoning mechanism , mining the relationship between the services ; expansion of traditional services semantic description language OWL -S to increase quality of service ontology to describe non-functional property services , screening services through a balanced consideration of the functional and non-functional requirements of the service , to get the optimal service combination sequence . Ontology library of establishing in the process of combination is a complex process , service composition field of application need , we are introduced based on the digitized learning standard meta- data of oriented digital learning environment to build the ontology library and the services the library 's construction methods at the same time , also provides the ability to self-learning ontology library , to enable them to constantly improve .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Program design,software engineering > Software Engineering > Software Development
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