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A Query Rewriting Approach for Web Service Composition
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BibTeX
@MISC{Barhamgi_aquery,
author = {Mahmoud Barhamgi and Djamal Benslimane and Brahim Medjahed},
title = {A Query Rewriting Approach for Web Service Composition},
year = {}
}
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Abstract
Abstract—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. Index Terms—Services integration framework, advanced services invocation framework, services delivery platform, composite web services. Ç 1
Keyphrases
dp service query rewriting approach web service composition user query web service service-oriented query query-like access novel approach output parameter rdf view abstract data-providing query rewriting algorithm organization data semantic relationship several service index term service integration framework mediated ontology service invocation framework composite web service service delivery platform query mediator performance evaluation data source service composition dp service result
