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Ghallab, M., Howe, A., Knoblock, C., McDermott, D., Ram, A., Veloso, M., Weld, D. and Wilkins, D. (1998) PDDL—The Planning Domain Definition Language, Version 1.2. Technical Report CVC TR-98-003/DCS TR-1165. Yale Center for Computational Vision and Control.

has been cited by the following article:

• TITLE: A Concept of Possibility for Real-World Events

  AUTHORS: Daniel G. Schwartz

  KEYWORDS: Possibility, A Real-World Event, Street Network

  JOURNAL NAME: Journal of Computer and Communications, Vol.14 No.8, August 14, 2026

  ABSTRACT: This paper offers a new concept of possibility as an alternative to the concept originally introduced by L.A. Zadeh in 1978. This new version was inspired by the original but, formally, has nothing in common with it other than that they both adopt the same interpretation of the logical connectives. Moreover, rather than seeking to provide a general notion of possibility, this focuses specifically on the possibility of a real-world event. An event is viewed as having prerequisites that enable its occurrence and constraints that may impede its occurrence, and the possibility of the event is computed as a function of the probabilities that the prerequisites hold and the constraints do not. This version of possibility might appropriately be applied to problems of planning. When there are multiple plans available for achieving a goal, this theory can be used to determine which plan is most possible, i.e., easiest or most feasible to complete. It is speculated that this model of reasoning correctly captures normal human reasoning about plans. The theory is elaborated and an illustrative example for vehicle route planning is provided. There is also a suggestion of potential future applications.