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What is a domain description in a planning language?

  • A.The set of goals a planner is expected to achieve
  • B.The physical environment in which a robot will operate
  • C.The types, predicates and action schemas of a class of problems
  • D.The particular objects and initial state of one instance

Answer: C

A domain describes the actions and vocabulary once, and each problem instance supplies objects, an initial state and a goal. That separation lets one domain serve many problems and is what makes benchmark libraries possible. Instances, goals and physical environments are different things. Separating what is common to a class of problems from what varies between them is a modelling discipline that pays whenever more than one instance will be solved.

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