Abstract
The present paper tackles the access problem to distributed and heterogeneous data sources. In this context we propose a full service approach for composing a new pattern of services. This pattern, called multimedia web services (MaaS: Multimedia as a Service): is able to retrieve data regarding their type (image, video, audio, text). The composition of WSM allows to resolve user requests. The proposed approach for MaaS composition is based on two main principles: the clustering and the filtring of WSDL data.