UML25 — Location: 18.1.3 Semantics Use Cases and Actors P. 685 - Actors need not initiate

current text: “Each UseCase specifies a unit of useful functionality that the subject provides to its users (i.e., a specific way of interacting with the subject). This functionality, which is initiated by an Actor, must always be completed for the UseCase to complete.”

[AC] I think the clause “which is initiated by an Actor” is wrong, according to the use case theory formulated by Jacobson, where each use case must provide value to an actor, but not necessarily be initiated by an actor, because there are also time-triggered use cases.

What's more, this clause does not correspond to any constraint in the metamodel. So, even if it was also in the 11-08-06 version, I suggest to remove it

agreed