基于语义的Web服务发现技术研究

Research on Web service discovery technology based on semantic

针对现有基于语义的服务发现机制普遍对服务质量描述和服务分类考虑不够,以及匹配机制适应范围较窄、匹配效率较低的问题,进行了服务描述与服务发现技术的研究,对OWL-S规范作了一定的补充,并提出了一种基于语义的服务发现算法。以树形结构描述Web服务,按照一定策略对节点赋予不同的权值并分类存储。在服务匹配时,首先对服务请求进行预处理和领域定位,然后利用基于WordNet和HowNet的语义相似度计算方法以及一定的辅助技术实现服务匹配。实验结果表明,该服务匹配算法具有较好的查准率和查全率。

Web service description and discovery technologies were researched. Then OWL-S was extended and a.Web service discovery algorithm was proposed because the presently available service discovery mechanism has weaker quality of service description, less service classification, narrower match scope and lower efficiency. Web services were described using tree structure, different weights to nodes were given according to certain strategy and services were stored by classification. Web services requests were pretreated and oriented services classifications were located firstly, then the Web services were matched by using certain semantic similarity calculation method based on WordNet or HowNet and using assistant technology. The experiments prove that this algorithm has higher precision and recall than others.