The two models presented in this paper are suitable for multi-agent planning. The recursive Petri nets allow the plans modelling (both at the agent and multi-agents levels) and their management when abstraction and dynamic refinement are required. RPN allows, easily, the synchronization of individual agents'plans. They are, in particular, interesting for the multi-agent validation thanks to the reachability tree building if combined to reduction technics (in order to avoid the combinatory explosion of the the number of states). The main shortcoming of this model is the absence of explicit handling of temporal constraints. This is why we developped a model based on Hybrid Automata that model different clocks evolving with different speeds. These clocks may be the resources of each agent and the time.
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