Well-formed Petri net
Well-formed Petri nets are a Petri net class jointly elaborated between the University of Paris 6 and the University of Torino in the early 1990s.
It is a restriction of the high-level nets introduced by K. Jensen. The main advantage of Well Formed Nets is the notion of symbolic reachability graph that is composed of symbolic states. A symbolic state is a state representing several concrete states in the state space of the system described by the Petri net. So, much larger state spaces can be represented.
This notion of symbolic state space requires that only a limited set of operators are available.
