# Handling PDDL3.0 State Trajectory Constraints with Temporal Landmarks

## TL;DR

This paper demonstrates how temporal landmarks can effectively handle PDDL3.0 state trajectory constraints, enhancing planning performance and deadline management.

## Contribution

It introduces a formalism that leverages temporal landmarks within TempLM to represent and reason about trajectory constraints in planning.

## Key findings

- Temporal landmarks improve handling of trajectory constraints.
- TempLM effectively manages deadline-related planning problems.
- The approach enhances planner performance with PDDL3.0 constraints.

## Abstract

Temporal landmarks have been proved to be a helpful mechanism to deal with temporal planning problems, specifically to improve planners performance and handle problems with deadline constraints. In this paper, we show the strength of using temporal landmarks to handle the state trajectory constraints of PDDL3.0. We analyze the formalism of TempLM, a temporal planner particularly aimed at solving planning problems with deadlines, and we present a detailed study that exploits the underlying temporal landmark-based mechanism of TempLM for representing and reasoning with trajectory constraints.