An Operational Semantics and a Compiler for Modechart Speciications

The Modechart speciication language is a formalism for speciication of real-time systems. The original semantics of the language is described in an axiomatic style, with Real-Time Logic being the underlaying logic. We introduce a new formal semantics for it in an operational style in two steps. The semantics for the class of deterministic speciications is introduced rst and then it is extended for the general class of non-deterministic speciications. The deterministic semantics leads very naturally to an implementation of a compiler, which is described as well. An enhancement to that compiler provides support for a limited, but very useful in practice, subset of the class of non-deterministic speciications.