Realizability is controllability

  • Authors:
  • Niels Lohmann;Karsten Wolf

  • Affiliations:
  • Universität Rostock, Institut für Informatik, Rostock, Germany;Universität Rostock, Institut für Informatik, Rostock, Germany

  • Venue:
  • WS-FM'09 Proceedings of the 6th international conference on Web services and formal methods
  • Year:
  • 2009

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Abstract

A choreography describes the interaction between services. It may be used for specification purposes, for instance serving as a contract in the design of an inter-organizational business process. Typically, not all describable interactions make sense which motivates the study of the realizability problem for a given choreography. In this paper, we show that realizability can be traced back to the problem of controllability which asks whether a service has compatible partner processes. This way of thinking makes algorithms for controllability available for reasoning about realizability. In addition, it suggests alternative definitions for realizability. We discuss several proposals for defining realizability which differ in the degree of coverage of the specified interaction.