Knowledge and the Action Description Language A

We introduceAk, an extension of the action description languageA (Gelfond & Lifschitz, 1993) to handle actions which affect knowledge. We use sensing actions to increase an agent’s knowledge of the world and non-deterministic actions to remove knowledge. We include complex plans involving conditionals and loops in our query language for hypothetical reasoning. We also present a translation of Ak domain descriptions into epistemic logic programs.