Branching pomsets for choreographies (technical report)

Luc Edixhoven, Sung-Shik Jongmans, Guillermina Cledou, José Proença

Research output: Book/ReportTechnical reportAcademic

Abstract

Choreographic languages describe possible sequences of interactions among a set of agents. Typical
models are based on languages or automata over sending and receiving actions. Pomsets provide a
more compact alternative by using a partial order over these actions and by not making explicit the
possible interleaving of concurrent actions. However, pomsets offer no compact representation of
choices. For example, if an agent Alice can send one of two possible messages to Bob three times, one
would need a set of 2×2×2 distinct pomsets to represent all possible branches of Alice’s behaviour.
This paper proposes an extension of pomsets, named branching pomsets, with a branching structure
that can represent Alice’s behaviour using 2+2+2 ordered actions. We encode choreographies as
branching pomsets and show that the pomset semantics of the encoded choreographies are bisimilar
to their operational semantics.
Original languageEnglish
PublisherOpen Universiteit Nederland
Number of pages23
Publication statusPublished - Jul 2022

Publication series

SeriesOUNL-CS (Technical Reports)
Number04
Volume2022

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