I'd like to be able to create diagram descriptions in ArgoUML.  This comes up a lot when I'm generating documentation and I wish I could describe some of the salient points about a diagram.  Trying to put this in a couple of paragraphs comment doesn't really work for me.  I've tried using a stereotype but I can't really apply a stereotype to a diagram, nor can I simply add a tagged value to the diagram.  So before, I file an enhancement request this, I would like to know if the UML standard supports this kind of usecase?  Or if there's some other way of approaching this problem in ArgoUML?