基于本体的Web服务组合异构消息的转换

Web服务的动态组合中所面临的一个重要问题是不同Web服务之间的消息格式的异构，这使得服务组合的流程定义和服务的选择有了很大的耦合性，因而动态组合变得困难．本文分析了Web服务组合中消息传递的异构现象，提出了一种基于本体的异构消息自动匹配和转换方法．该方法将上游Web服务输出信息通过本体匹配的方式有效的提取出来，并根据对应操作转换为与当前Web服务的输入参数格式相匹配的形式．这样，简化了Web服务组合的过程定义，也能够支持Web服务的替换和过程的动态演化．

Ontology Based Heterogeneous Message Transformation in Web Service Composition

One of most important problems in the web service composition is the heterogeneity of the messages between web services, which couples the process definition of web service composition and the choosing of the web service. Thus,the dynamic service composition becomes difficult. This paper presents a study of semantic conflict of messages among different web services, and proposes an ontology based approach in order to map and transform heterogeneous messages automatically. The basic ontology treasure has the ability of auto-learn and a set of operators are provided to access it. During the running time, useful information is selected from the messages created by the prior web services and converted into the format which maps to the input of the current web service. In this way, the definition of the composition process is simplified and the dynamic evolution of process is also supported.