UMLR — About behavior ports

On the semantics of behavior ports, UML 2.5 §11.3.3 says:

“A Port has the ability, by setting the property isBehavior to true, to specify that any requests arriving at this Port are handled by the Behavior of the instance of the owning EncapsulatedClassifier, rather than being forwarded to any contained instances, if any”

It is not clear whether “the Behavior” refers to the classifier behavior only or to any owned behavior. In the former case, an invocation of Op1()at this port can only have a triggered effect, i.e. the classifier behavior should specify a trigger associated to the corresponding CallEvent since the method specified for this operation (if any) will not be executed as a direct consequence of this invocation.

This has to be clarified.