[boost] class diagrams for template heavy design

Hi, sorry if this offtopic, but I don't know any other good place to ask this question: I'm currently in the situation to document a heavy templated class design (generic with templated policies and partial specializations, but nothing too exotic like boost::mpl ;-). I always prefer graphical UML like class diagrams to describe the basic design. Now I wonder if there are any good graphical representations for templated code but haven't found anything on this with a quick google search. As there are so many template wizards on this list, has someone any hints, links, suggestions on this? Thanks. best regards, Vasco Lohrenscheit