A Logical Semantics for PDDL+


  • Vitaliy Batusov York University
  • Mikhail Soutchanski Ryerson University




PDDL+ is an extension of PDDL2.1 which incorporates fully-featured autonomous processes and allows for better modelling of mixed discrete-continuous domains. Unlike PDDL2.1, PDDL+ lacks a logical semantics, relying instead on state-transitional semantics enriched with hybrid automata semantics for the continuous states. This complex semantics makes analysis and comparisons to other action formalisms difficult. In this paper, we propose a natural extension of Reiter’s situation calculus theories inspired by hybrid automata. The kinship between PDDL+ and hybrid automata allows us to develop a direct mapping between PDDL+ and situation calculus, thereby supplying PDDL+ with a logical semantics and the situation calculus with a modern way of representing autonomous processes. We outline the potential benefits of the mapping by suggesting a new approach to effective planning in PDDL+.




How to Cite

Batusov, V., & Soutchanski, M. (2021). A Logical Semantics for PDDL+. Proceedings of the International Conference on Automated Planning and Scheduling, 29(1), 40-48. https://doi.org/10.1609/icaps.v29i1.3548