@article{Höller_Behnke_Bercher_Biundo_Fiorino_Pellier_Alford_2020, title={HDDL: An Extension to PDDL for Expressing Hierarchical Planning Problems}, volume={34}, url={https://ojs.aaai.org/index.php/AAAI/article/view/6542}, DOI={10.1609/aaai.v34i06.6542}, abstractNote={<p>The research in hierarchical planning has made considerable progress in the last few years. Many recent systems do not rely on hand-tailored advice anymore to find solutions, but are supposed to be domain-independent systems that come with sophisticated solving techniques. In principle, this development would make the comparison between systems easier (because the domains are not tailored to a single system anymore) and – much more important – also the integration into other systems, because the modeling process is less tedious (due to the lack of advice) and there is no (or less) commitment to a certain planning system the model is created for. However, these advantages are destroyed by the lack of a common input language and feature set supported by the different systems. In this paper, we propose an extension to PDDL, the description language used in non-hierarchical planning, to the needs of hierarchical planning systems.</p>}, number={06}, journal={Proceedings of the AAAI Conference on Artificial Intelligence}, author={Höller, Daniel and Behnke, Gregor and Bercher, Pascal and Biundo, Susanne and Fiorino, Humbert and Pellier, Damien and Alford, Ron}, year={2020}, month={Apr.}, pages={9883-9891} }