UMLR — Semantics of Message argument mapping in Interactions

The spec is inconsistent regarding the correspondence of Message arguments and its in/inout parameter.

In Section 17.4.3 it says: “The arguments of the Message correspond to the in and inout ownedParameters of the Operation, in the order of the ownedParameters.”

This is also specified in the formal OCL constraint in Section 17.12, subsection Message, subsubsection Constraints

However, in Section 17.4.4 it says: “A request-message-label may only have input-arguments with in-parameter-names if the Message has a signature. In this case, the input-arguments are matched by name to the in and inout ownedParameters of an Operation or the attributes of a Signal.”

I assume that the OCL is correct and the Notation section would need clarification?!