Default Timed Concurrent Constraint Programming

Abstract

We extend the model of [SJG94b] to express strong time-outs (and pre-emption): if an event A does not happen through time t, cause event B to happen at time t. Such constructs arise naturally in practice (e.g. in modeling transistors) and are supported in languages such as ESTEREL (through instantaneous watchdogs) and LUSTRE (through the “current” operator).