Towards analysing a class of object Petri nets

The Petri net theory has been used to specify many types of systems, in particular, concurrent, distributed and nondeterministic. A class of high level object based Petri nets, OBJSA nets, is being used to model the behaviour of a concurrent system-a priority queue. We propose a method of analysing its behaviour by examining its structure and its underlying subnet components according to the state machine paradigm. This is closely related to the liveness and safeness analysis of free choice Elementary Net systems with simple or unstructured tokens in existing literature. By using these existing results and applying them to OBJSA nets with structured tokens, we are able to determine the liveness property of our priority queue example.