Promoting reuse in web services by managing variability

Service Oriented Architecture (SOA) refers to an architectural paradigm that describes how organizations, people and systems provide and use services to achieve their goals. Moreover, with the evolution of SOA, the focus in software development has shifted from applications to reusable services. Besides, reuse in SOA has more focused on service composition rather than reuse of existing implementations to build new services with additional functionalities. The preferred way to realize SOA remains web services which explain our interest in promoting reuse of Web services by managing variability. In this paper, we propose a model driven method for managing Web service's variability based on MDA (Model Driven Architecture). In fact, through MDA, the method enables the automation of Web service's realization regardless of the supported platforms. Moreover, we present a WSDL extension meta-model called VarWSDL which enhances Web services by variability notions. That permits Web services reuse.