On Total-Order HTN Plan Verification with Method Preconditions – An Extension of the CYK Parsing Algorithm. Lin, S., Behnke, G., Ondrčková, S., Barták, R., & Bercher, P. In Proceedings of the 37th AAAI Conference on Artificial Intelligence (AAAI 2023), pages 12041–12048, 2023. AAAI Press.
On Total-Order HTN Plan Verification with Method Preconditions – An Extension of the CYK Parsing Algorithm [pdf]Paper  On Total-Order HTN Plan Verification with Method Preconditions – An Extension of the CYK Parsing Algorithm [pdf]Poster  On Total-Order HTN Plan Verification with Method Preconditions – An Extension of the CYK Parsing Algorithm [pdf]Slides  On Total-Order HTN Plan Verification with Method Preconditions – An Extension of the CYK Parsing Algorithm [link]Zenodo  doi  abstract   bibtex   33 downloads  
In this paper, we consider the plan verification problem for totally ordered (TO) HTN planning. The problem is proved to be solvable in polynomial time by recognizing its connection to the membership decision problem for context-free grammars. Currently, most HTN plan verification approaches do not have special treatments for the TO configuration, and the only one features such an optimization still relies on an exhaustive search. Hence, we will develop a new TOHTN plan verification approach in this paper by extending the standard CYK parsing algorithm which acts as the best decision procedure in general.

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