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Comparing truly concurrent semantics for contextual Place/Transition nets with inhibitor and read arcs

Busi N., Pinna G.M.

Fundamenta Informaticae

2000

Vol. 44, Nr 3

209-244

The paper is centered around the study and comparison of truly concurrent semantics for P/T nets with inhibitor and read arcs (called henceforth contextual P/T nets). We start proposing a causal semantics for P/T nets, that we prove to be equivalent to history preserving bisimulation defined on nonsequential processes. Then we develop a conservative extension of the causal semantics to contextual P/T nets and we prove this one to be finer than step semantics. Finally, a comparison of causal semantics with the process based semantics for contextual P/T systems proposed in [7] is carried out.

Process semantics for Place/Transition nets with inhibitor and read arcs

Busi N., Pinna G.M.

Fundamenta Informaticae

1999

Vol. 40, Nr 2,3

165-197

In this paper we introduce a truly concurrent semantics for P/T nets with inhibitor and read arcs, called henceforth Contextual P/T nets. The semantics is based on a proper extension of the notion of process to cope with read and inhibitor arcs: we show that most of the properties enjoined by the classical process semantics for P/T nets continue to hold and we substantiate the adequateness of our notion by comparing it with the step semantics.