Trace semantics for actor systems

  • Vasco Vasconcelos
  • Mario Tokoro
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 612)


The theory of traces is used to describe the behavior of actor systems. The semantics is built from two simple concepts: a set of events representing the reception of messages by objects, and a binary symmetric and irreflexive relation on events—independence—representing permissible concurrency. Causality, the dual notion of concurrency, is expressed by the dependence relation—the complement of independence. A particular execution of a system is described by a trace: a labeled acyclic graph where nodes are labeled with events and the only edges are between nodes labeled with dependent events. The behavior of a system is viewed as the set of traces representing all possible executions. Finally, a composition operation on systems and a synchronization operation on behaviors are presented: they allow to derive the behavior of complex systems from the behavior of its components.


Actor System Initial Configuration Dependence Graph Sequential Transition Independence Relation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • Vasco Vasconcelos
    • 1
  • Mario Tokoro
    • 1
    • 2
  1. 1.Department of Computer ScienceKeio UniversityYokohamaJapan
  2. 2.Sony Computer Science Laboratory Inc.TokyoJapan

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