How do you override some tags of an owned attribute of a class?

[mse]

I have an interface with 1 attribute. I am typing however two ports with the same interface. On one port I would like to modify a tag of that interface to have a certain value, but on the other port I would like to use another value. How can you do this?

If I modify the tag on the interface, then it will apply globally to all classes referencing it, but I need to something like what you see in composite structure diagrams, where each port is a slot and unique to context. The same I need for an attribute of an interface or even a class.

[qwerty]

Well, you can't. You need to think of other ways to do that. Probably the property belongs to the port rather than to the interface?

q.