>Mike I realize your making an analogy here (I hope...) but just to be technically anal, normal forms are strictly related to your data modal and have nothing to do with object heuristics.

I know, I said "kindof like ... in data" so that gets me off the hook, right? :-) All I meant was you should only have properties and methods that support the objects purpose, like fields that only support the PK. JMO.