Ok, I'm working on porting my DP project to SceneGraph and running into the same problem a lot of people are having, with my categories. I'm happy to dig into the source code and build up from scratch, but is there a functional specification for this language somewhere? Every language has its own notion of data structures and enumerators and conditionals .... but unless I see specific examples in the provided code for what I need, I'm going to be helplessly lost.