关键词: 数据服务, 服务组合, 查询重写, 本体, Web服务描述语言

Abstract: In order to solve critical technology problems of data aggregation, an ontology-based approach was introduced to publish and compose data-intensive web service. Semantic web service specification was used to describe contents & ability of the web service. The dynamic evolving interface technology of web service and a query rewriting-based planner for service composition algorithm were proposed. Advantages of the proposed approach were that the data service could dynamically adapt itself to customers query request so as to improve the users satisfaction on query requests. The simulation results revealed that the approach would be more adaptive for large-scale data service composition. The approach was applicable to the highly interactive situation comparing to the data service with fixed interfaces of Web Service Description Language (WSDL).

Key words: data service, service composition, query rewriting, ontology, web service description language