中文摘要：

在通用的Web服务描述语言基础上,提出一种基于倒排序索引表和二分图匹配的两阶段服务操作发现方法。第1个阶段利用倒排序索引表得到相关服务,获取服务操作的输入和输出参数,用户根据需要选取期望的输出参数作为服务请求。第2个阶段采用二分图匹配方法对服务请求进行服务操作匹配,发现所需的Web服务操作。实验结果表明,该方法能提高服务发现的准确性和灵活性,并提供功能相同的备选服务操作。

英文摘要：

On the basis of the common Web Services Description Language（WSDL）, a two stages Web service discovery method based on the keyword index table and bipartite graph is proposed. Using the inverted order index table in the first stage, related service is discovered and the input and output parameters of service are obtained. The expected output parameters based on users＇ need are used as service request. In the second stage, it uses bipartite graph matching to match the service operation for the service request, and finds the required Web service operation. Experimental results show that the method not only can improve the accuracy and the flexibility of the service discovery, but also can provide alternative service operation.