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Torben Amtoft, Assaf J. Kfoury, and Santiago M.
Pericas-Geertsen
Orderly communication in the ambient
calculus
Computer Languages, 28:29-60, 2002
The Ambient Calculus (henceforth, AC) was developed by Cardelli
and Gordon as a formal framework to study issues of mobility and
migrant code. We present a type system for AC that allows the
type of exchanged data within the same ambient to vary over time. Our
type system assigns what we call behaviors to processes; a
denotational semantics of behaviors is proposed, here called
trace semantics, underlying much of the remaining analysis. We
state and prove a Subject Reduction property for our typed version of
AC. Based on techniques borrowed from finite automata theory,
type checking of fully type-annotated processes is shown to be
decidable. We show that the typed version of AC originally
proposed by Cardelli and Gordon can be naturally embedded into our
typed version of AC.
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