TAPAAL is a tool for modelling, simulation and verification of
Timed-Arc Petri nets, developed at Department of Computer Science at
AALborg University in Denmark. Timed-Arc Petri Net (TAPN) is a time
extension of the classical Petri net model (a commonly used graphical
model of distributed computations introduced by Carl Adam Petri in his
disseration in 1962). The time extension we consider allows for
explicit treatment of real-time, which is associated with the tokens in
the net (each tokens has its own age) and arcs from places to
transitions are labelled by time intervals that restrict the age of
tokens that can be used in order to fire the respective transition. In
TAPAAL tool a furter extension of this model with age invariants with
transport arcs (which are more expressive than for example previously
considered read-arcs) and with inhibitor arcs is implemented.
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