Efficiently Handling Temporal Knowledge in an HTN Planner

Luis Castillo, Juan Fdez-Olivares, Oscar Garcia-Perez, Francisco Palao

This paper presents some enhancements in the temporal reasoning of a Hierarchical Task Network (HTN) planner, named SIADEX, that, up to authors knowledge, no other HTN planner has. These new features include a sound partial order metric structure, deadlines, temporal landmarking or synchronization capabilities built on top of a Simple Temporal Network and an efficient constraint propagation engine boosted by exploiting the causal structure of plans.

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