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Choreography – Abstract State Machines (cont')

  • The choreography model consists primarily of
    • state signature – defines ontology which is used by the choreography,
    • set of transition rules – express the interaction steps in the choreography and also the updates over the state.
  • State signature allows to define
    • Set of imported ontologies
    • Set of modes which are associated with the concepts and/or relations.
  • Modes can be of the following types:
    • static – extension of the concept/relation cannot be changed,
    • in - extension of the concept/relation can only be changed by the client and read by the choreography instance; grounding mechanism must be provided.
    • out - extension of the concept/relation can only be changed by the the choreography instance and read by the client; grounding mechanism must be provided.
    • shared - extension of the concept/relation can be changed and read by both choreography instance and client; grounding mechanism must be provided, and
    • controlled - extension of the concept/relation is changed and read only by the choreography instance.

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