C++11 variadic template parameters notation in UML

Question

Does anyone know how to model C++11 variadic template parameters correctly in UML 2.2?
I've seen a number of UML profile models as a result from web-search, that seem to describe the construct of 'any number of optional template parameters'. Or do I just confuse this with the fact that any usual template parameter might be optional when a default is provided in the declaration?

Can someone refer to appropriate links or specific sections of the UML 2.2/2.3 specs?

Here's a proposal I've been creating with enterprise-architect:

UPDATE:
I'm especially interested in how the binding for unpacking mechanisms could be modeled.

Answer 1

OK, since nobody seems to have an answer I'm going to answer my question with what I've come up:

It's just a slightly modified model of the first proposal I gave in the question. At least with enterprise-architect I'm able to generate a syntactically correct and usable code skeleton. It's not possible to reverse engineer the generated code though.