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Issue No. 03 - July-September (2010 vol. 3)
ISSN: 1939-1374
pp: 206-222
Mahmoud Barhamgi , Claude Bernard University Lyon1, LIRIS, Villeurbanne
Djamal Benslimane , Claude Bernard University Lyon1, LIRIS, Villeurbanne
Brahim Medjahed , University of Michigan-Dearborn, Dearborn
Data-Providing (DP) services allow query-like access to organizations' data via web services. The invocation of a DP service results in the execution of a query over data sources. In most cases, users' queries require the composition of several services. In this paper, we propose a novel approach for querying and automatically composing DP services. The proposed approach largely draws from the experiences and lessons learned in the areas of service composition, ontology, and answering queries over views. First, we introduce a model for the description of DP services and specification of service-oriented queries. We model DP services as RDF views over a mediated (domain) ontology. Each RDF view contains concepts and relations from the mediated ontology to capture the semantic relationships between input and output parameters. Second, we propose query rewriting algorithms for processing queries over DP services. The query mediator automatically transforms a user's query (during the query rewriting stage) into a composition of DP services. Finally, we describe an implementation and provide a performance evaluation of the proposed approach.
Services integration framework, advanced services invocation framework, services delivery platform, composite web services.

D. Benslimane, B. Medjahed and M. Barhamgi, "A Query Rewriting Approach for Web Service Composition," in IEEE Transactions on Services Computing, vol. 3, no. , pp. 206-222, 2010.
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