H. A. Geffner (2003) "PDDL 2.1: Representation vs. Computation", Volume 20, pages 139-144

PDF | PostScript | doi:10.1613/jair.1995

I comment on the PDDL 2.1 language and its use in the planning competition, focusing on the choices made for accommodating time and concurrency. I also discuss some methodological issues that have to do with the move toward more expressive planning languages and the balance needed in planning research between semantics and computation.

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