I've generated an UML class diagram for Pure MVC. I'm not an advanced Pure MVC user, so the diagram may need some tweaks. Feel free to modify and use it anyway you want.http://goo.gl/JIFri
It's was generated from AS3 port, although I think it may be helpful for users of other ports too.
//here is source file
, you can edit it with Crocus (UML for AS3 & Flex)