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Which of the following is not one of the three ways to classify an action assertion?

  • A.Condition
  • B.Integrity Control
  • C.Authorization
  • D.Enabler

Answer: D

Correct answer: Enabler

The three classifications are condition, integrity constraint and authorisation - a rule that must be tested, a rule that must always hold, and a rule about who may do what. Enabler is not among them; it names no distinct kind of constraint on behaviour.

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