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Date created: 5/10/2003
Last updated: 06/03/2003
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Classes of Atomic Activites

Constraints on Atomic Activity Occurrences

The first set of questions characterizes the conditions under which atomic activities can possibly occur; these are often referred to as the preconditions for the activity.

  1. Unconstrained Atomic Activity Occurrences

    Are there any constraints on the occurrence of the atomic activity?

  2. Constraints on Atomic Activity Occurrences based on State

    Are the constraints on the occurrence of the atomic activity based only on the state prior to the activity occurrence?

  3. Time-based Constraints on Atomic Activity Occurrences

    Are the constraints on the occurrence of the atomic activity based on the time at which the activity occurrence begins?

  4. Constraints on Atomic Activity Occurrences based on State and Time

    Are the constraints on the occurrence of the atomic activity based both on the state prior to the activity occurrence and the time at which the activity occurrence begins?

Constraints on the Effects of Atomic Activities

Effects are fluents that hold after an activity occurrence; the second set of questions characterizes the conditions under which atomic activities have different effects.

  1. Context-Free Effects

    Are there any constraints on the effects of the atomic activity?

  2. Effects of Atomic Activity Occurrences based on State

    Do the effects of the occurrence of the atomic activity depend only on the state prior to the activity occurrence?

  3. Time-based Effects of Atomic Activity Occurrences

    Do the effects the occurrence of the atomic activity depend only on the time at which the activity occurrence begins?

  4. Effects of Atomic Activity Occurrences based on State and Time

    Do the effects of the occurrence of the atomic activity depend both on the state prior to the activity occurrence and the time at which the activity occurrence begins?


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