How to describe a contained map in UML class diagram?

Question

I have a MyServer class that contains a Map whose keys are MyClientType objects and whose values are MyClient objects. I\'d like to depict this relationship in a class diagr

Answer 1

           MyServer
               |
               |*
            T1toT2
            /    \
          1/      \1
         Key     Value

The difference to Mark's solution is that the server has a many-relation to the containers. That's also how the Eclipse Modeling Framework (EMF) proposes to implement maps.

You might also throw in some more UML-specific things, like specifying that the keys have to be unique (through stereotypes).