UMLR — 18.1.3 Semantics Use Case and Actors Extends P. 687 - Show name of extension

current text: “Extend is a kind of DirectedRelationship, such that the source is the extending UseCase and the target is the extended UseCase. It is also a kind of NamedElement so that it can have a name in the context of its owning UseCase.”

[AC] I can infer that the owning UseCase is the extending UseCase, but I think this should be stated again, to avoid misunderstandings. It could be also useful to give an example, with a specific figure, of a naming of the extend relationship.