PDDL2.1

PDDL2.1 (Planning Domain Definition Language 2.1) is a formal language used to describe complex planning problems, often for artificial intelligence systems. It extends earlier versions by supporting time, durative actions (actions that take time), and concurrent activities—allowing planners to handle real-world scenarios where multiple tasks happen simultaneously or have durations. This language enables precise modeling of dynamic environments, making it possible for AI systems to devise efficient, feasible plans involving timing constraints, resource management, and complex interactions. Overall, PDDL2.1 provides a structured way for computers to understand and generate detailed plans in complex, real-time settings.