Ontologies in a Service Oriented Computing Environment

With Service Oriented Computing (SOC), services have a central role in rapid development and deployment of loosely-coupled, massively distributed scientific applications with supporting services spanning from Computer Algebra Systems (CAS) to Grid services. Key features from service orientation can be easily integrated in a SOC-based development. The integration of SOA with Grid infrastructures and Grid Services is an open issue for current research. A service-oriented architecture for the Grid (like OGSA) and its corresponding infrastructure, namely OGSI, are fundamental in order to develop Service Orientation over a Grid infrastructure. The PEGAF project is developing a generic platform for the modeling, implementation and execution of workflow-based application with Grid orientation. In this paper we are presenting the general architecture of the PEGAF platform, and an ontology-oriented view as the core of a flexible architecture for the definition and execution of dynamic workflows.