UML22 — Section: 9.3.11

Could you clarify the semantics of port according to its visibility property, i.e. clarify the following sentence: "A port by default has public visibility. However, a behavior port may be hidden but does not have to be."

The last sentence was added to clarify that a port is not necessarily public, and to highlight that often behavior ports are hidden. However, as the issue submitter points out, that “clarification” is probably more confusing than it is worth. It would be better placed in the description section, but that would require explaining behavior port there. Best to drop.