关键词: 自主Web服务环境, 环境本体, 规划图, 组合服务需求, 组合模式

Abstract: In active service environment, Web services are normally viewed as intelligence agent entities and they can usually aggregate around some requirements to form a magnetic effection phenomenon, because of their ability of seeking and discovering the requests that they can participate in. According to this special aggregation platform driven by requirement for autonomous services, this paper proposes a graph-planning algorithm to build up the composition service requirement model based on the theory of environment ontology. Then, it defines the composition mode concept as a form of logic solution to composition requirement from the perspective of the functional fragment. Besides, it introduces CPEA (combination pattern extraction algorithm) to describe how to extract every suitable composition models from a planning-graph-structure request. Finally, it uses the specific example of travel arrangement to verify the theory referred above.

Key words: active Web service environment, environment ontology, planning graph, composition service requirement, combination pattern