@incollection{eprints2298,
       publisher = {Springer},
           pages = {285--300},
          series = {Lecture Notes in Computer Science},
            note = {Proceedings of the 18th European Symposium on Programming, ESOP 2009, Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS 2009, York, UK, March 22-29, 2009.},
          number = {5502},
       booktitle = {Programming Languages and Systems},
          author = {Luis Caires and Hugo  Torres Vieira},
            year = {2009},
           title = {Conversation types},
        abstract = {We present a type theory for analyzing concurrent multiparty interactions as found in service-oriented computing. Our theory introduces a novel and flexible type structure, able to uniformly describe both the internal and the interface behavior of systems, referred respectively as choreographies and contracts in web-services terminology. The notion of conversation builds on the fundamental concept of session, but generalizes it along directions up to now unexplored; in particular, conversation types discipline interactions in conversations while accounting for dynamical join and leave of an unanticipated number of participants. We prove that well-typed systems never violate the prescribed conversation constraints. We also present techniques to ensure progress of systems involving several interleaved conversations, a previously open problem.},
             url = {http://eprints.imtlucca.it/2298/}
}