Abstract
Nested Petri nets (NP-nets) is a formalism for modeling hierarchical multi-agent systems. Tokens in nested Petri nets are elements represented by nets themselves. The paper continues investigating semantic properties of NP-nets, started in [10], where two-level NP-nets were studied. Here we consider multi-level and recursive NP-nets, for which decidability of termination and some other properties are proved. A comparison of NP-nets with other Petri net models is given.
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