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 Service modeling |
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Tuesday, December 16, 2003
Participants: Fabio Casati,
HP Labs, USA ; Jean-Jacques
Dubray, Attachmate, USA ; M.Papazoglou,
University of Tilburg ; Barbara Pernici, Politecnico di Milano, I (chair)
Process modeling and modelling tools have received attention from researches since the '80s. Several modelling approaches have been proposed, based on theoretical basis, such as Petri Nets, statecharts, and temporal logics, based on less formalized modelling notations such as in UML activity diagrams and workflow activity nets, based on coordination efforts
both in workflow systems producers communities and in business process modelling communities to develop a set of shared concepts at the basis of modelling activities.
The goal of the panel is to discuss modelling requirements arising from a service oriented perspective. Services are self-describing, platform-agnostic computational elements that support rapid, low-cost composition of distributed applications. Services perform functions that can be anything from simple requests to complicated business processes.
Services allow organisations to expose their core competencies programmatically over the Internet (or intra-net) using standard (XML-based) languages and protocols. Services help integrate applications that were not written with the intent to be easily integrated with other applications and define architectures and techniques to build new functionality while integrating existing application functionality.
Service-based applications are developed as independent sets of interacting services offering well-defined interfaces to their potential users.
The panel will discuss modelling aspects arising from different needs and perspectives:
- process requirements and conceptual modelling for services
- business process modelling and analysis from a service-oriented perspective
- coordination and composition of services
- models for service retrieval and invocation |
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| Service Composition |
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Thursday, December 18, 2003
Participants: Schahram Dustdar,
Vienna Univ. of Technology, Austria ; Frank
Leymann, IBM Software Group, Germany ; Paolo
Traverso, ITC-irst, Italy ; Sanjiva Weerawarana, IBM, TJ Watson Res. Center, USA (chair)
Service-oriented economies have thrived by being fertile ground for composition - i.e., by encouraging new value-added services to be offered by combining or composing other services in novel ways. For service-oriented computing to truly succeed, service composition must become a natural concept in Service-Oriented Computing. In this panel we
examine service composition in SoC and consider various composition models, issues related to quality of service composition, formal semantics of composition and the support for service composition in the Web services platform. |
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