relation: http://eprints.imtlucca.it/389/ title: CCS is an (Augmented) Contact Free C/E System creator: Degano, Pierpaolo creator: De Nicola, Rocco creator: Montanari, Ugo subject: QA75 Electronic computers. Computer science description: A new class of Petri Nets, called Augmented Condition/Event Systems is defined, by slightly relaxing the condition for enabling events. One system, called SgrCCS, from this class is used to give a new operational semantics to Milner's Calculus of Communicating Systems. The set of CCS agents together with the traditional, interleaving based, derivation relation is proved isomorphic to the case graph of SgrCCS (when single transitions only are considered). Our achievement is twofold: first, we provide CCS with a semantics which is able to describe concurrency and causal dependencies between the actions the various agents can perform; second, we guarantee an adequate linguistic level for the particular class of Petri Nets which can be defined through CCS operators. publisher: Springer contributor: Venturini Zilli, Marisa date: 1986 type: Book Section type: PeerReviewed identifier: Degano, Pierpaolo and De Nicola, Rocco and Montanari, Ugo CCS is an (Augmented) Contact Free C/E System. In: Mathematical Models for the Semantics of Parallelism. Lecture Notes in Computer Science, 280 . Springer, pp. 144-165. ISBN 3-540-18419-8 (1986) relation: http://dx.doi.org/10.1007/3-540-18419-8_13 relation: 10.1007/3-540-18419-8_13