UML241 — Composite structures/Unspecified connector features

Composite structures/Unspecified connector features between ports having multiple interfaces. What happens when ports have multiple interfaces, that in addition can mix
required and provided interfaces? This is not specified. In particular, a
connector could connect two ports using only a specified subset of the
interfaces from both ports.

Recommendation:
Extend the metamodel to allow the specification of the interfaces used for a
connector between ports having several interfaces.

or

Provide a default rule for that situation, such as the connector uses the
compatible interfaces between the interfaces of both ports.