Abstract The full service approach for composing (MaaS) Multimedia as a Service in multimedia data retrieving, which we have proposed in a previous work, is based on a four phases process: description; matching; clustering; and restitution. In this article, we show how MaaS services are matched to meet user needs. Our matching algorithm consists of two steps: (1) the domain matching step is based on the calculation of similarity degrees between the domain description of MaaS services and user queries; (2) the multimedia matching step compares the multimedia description of MaaS services with user queries. The multimedia description is defined as a SPARQL Protocol and RDF Query Language( SPARQL) query over multimedia ontology. An experimentation in a medical domain allowed to evaluate the solution. The results indicate that using both domain and multimedia matching considerably improve the performance of multimedia data retrieving systems.

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[17] Vacul n R., Chen H., Neruda R., and Sycara K., Modeling and Discovery of Data Providing Services, in Proceedings of IEEE International Conference on Web Services, Beijing, pp. 54-61, 2008. A Multimedia Web Service Matchmaker 461 Sid Midouni is PhD candidate at INSA-Lyon (France) and UABT University of Tlemcen (Algeria). He received a MSc from INSA-Lyon in Computer Science in 2005 and Magister degree in computer science from UABT University of Tlemcen in 2008. His research interests include information retrieval, web services, semantic web and multimedia data. Youssef Amghar received his PhD degree in 1989. He begins his career as assistant Professor in computer science at INSA-Lyon from 1990 to 2003. He becomes full Professor starting from 2003 and leads a research team in many fields of computer sciences (databases, information systems, services, and multimedia data). His is author of more than 100 publications both in journals and conferences. Azeddine Chikh holds a PhD in Information Systems from National Institute of Computer Sciences (NICS) in Algeria and Paul Sabatier University in France in 2004, a Masters in Information Systems from NICS in Algeria 1994, a Masters in e-learning from Switzerland in 2007, and a graduate certificate in systems engineering from USA, in 2003. His research interests include learning design; communities of practice; social networks; semantic web; and software engineering.