Abstract

lotos is a process algebra-based formal description technique (FDT). It has been standardized by the International Standards Organization (ISO) for the specification of communication and distributed software systems. The disabling operator of lotos is a unique feature not found in other FDTs. Though lotos is a powerful specification language, it is not used in the industries. This is because it is very difficult to implement its various operators. In this paper, we propose a scheme for distributed implementation of the disabling operator. Our main contribution lies in transforming the operational semantics of the disabling operator to a distributed implementation. The distributed implementation is specified as a hierarchy of communicating finite-state machines which are easy to implement.

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