UML14 — UML 2 Super/Connector

03-08-02.pdf, page 163:
Specifies a link that enables communication between two or more instances.
This link may be an instance of an association, or it may represent the
possibility of the instances being able to communicate because their
identities are known by virtue of being passed in as parameters, held in
variables, created during the execution of a behavior, or because the
communicating instances are the same instance.

Doesn't this imply a semantic variation point?

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