Service Oriented Architectures: The new software paradigm Wolfgang Reisig (Berlin) Abstract: Service oriented architectures are expected to become the foundational layer for tomorrow's information systems and are influencing already many application areas. The principles of SOA have evolved along applications, but the goals of SOA are far more ambitious, requiring a decent formal, abstract basis, and in particular adequate modelling techniques. This talk surveys some problems, discusses some elements of an abstract basis for SOA and outlines a generic modelling technique.