Service Composition for SDIs: Integrated Components Creation

We describe a methodology for creating composite Web services, a key ingredient in spatial data infrastructure (SDI) applications, which we demonstrate on an emergency management use case. The methodology uses three basic processes independent of the concrete implementation: service abstraction process, service composition process, and translation process. These processes share the concept of integrated component composed of two key aspects: a component-style composition of complex services together with a specific set of workflow patterns. We propose a novel model that implements the steps of such methodology, providing an efficient manner for developing service compositions and enhancing the expressiveness of target composition languages like BPEL4WS. We focus on the description of the service abstraction process and the relationships among its grounded elements - services, components, and workflow patterns -, which form the basis of an integrated component, for enhancing the service composition by facilitating the reuse of existing services