An Incremental Approach to Web Service Composition

Carlos Granell, José Poveda, Michael Gould


Geographic web services will soon become subsumed in the e-commerce world, a world where the composition of simple or atomic services to build compound services is a key characteristic. Since currently no detailed model of composite geographic web services exists, and within the scope of work on a European Union-funded project, we define such basic composition as part of an effort to test for geographic web service interoperability. Rather than adopting current static methods, we build on the concept of incremental composition and provide a model for defining, composing and invoking compositions in a flexible manner. We demonstrate a prototype application for this purpose, and illustrate its utility through a simple arithmetic function composer scenario in which complex arithmetic expressions could be easily evaluated in base of the composition of atomic services. Benefits of this incremental composition model over process-oriented alternatives are mentioned, and necessary semantic and other extensions are outlined.

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