Web服务图及其在服务发现中的应用研究

ON WEB SERVICES GRAPH AND ITS APPLICATION IN SERVICE DISCOVERY

Web服务是一种崭新的Web应用。随着Web环境下服务数量的快速增长,要在海量的服务中发现所需的服务是非常耗时的。UDDI V2增加了一个新特性publisherAssersion来描述UDDI注册中心里的商业实体间的关系,类似于网页之间的超链接,这样就产生了Web服务图。首先研究Web服务的新特征,然后提出并分析构建Web服务图的原理和算法,最后利用Web服务图进行服务发现。从仿真实验可看出提出的Web服务图对组合的Web服务发现是有效的。

Web services are a brand new Web application.Along with the rapid growth of the services in Web environment,to find the required service among mass services becomes time-consuming.In UDDI v2 there is a new feature,publisherAssersion,been added to express the relation between the business entities in a UDDI repository center which is similar to a hyperlink between the Web pages.Thus,a Web service graph would be generated.In this paper the new features of Web services are observed first,and then the principles and the algorithm for constructing a Web service graph are proposed and analyzed in detail.By using the Web service graph the service discovery is elaborated at last.It is shown from the simulated experiment that the Web service graph proposed in our paper is effective to the composite Web service discovery.