中文摘要：

针对传统语义web服务组合方法中仅考虑I/O接口间匹配，从而导致服务间功能匹配度不高的情况，提出一个新的语义web服务组合框架．该框架改进传统规划图以便体现服务的IOPE特性，为抽取组合方案提供功能匹配相关的启发信息．为了获得更多组合方案，框架一方面支持抽象用户请求的表达，另一方面在规划图的基础上，采用基于广度优先的后向搜索策略．最后，基于该框架实现一个web服务组合系统，一系列实验表明该框架是有效的和可伸缩的．

英文摘要：

Most traditional semantic web service composition approaches only consider the matching between I/Ointerfaces.This results in the low the function matching degree among services.To solve this problem,this paperproposes a new semantic web service composition framework,in which improved planning graph considering IOPEis used to provide heuristic information related to function matching.To obtain more solutions,the framework supportsabstract user requests and adopts the back-searching algorithm based on breadth-first strategy.Lastly,a webservice composition system is implemented on the basis of this framework.The efficiency and scalability of thisframework are proved by a series of experiments.