> But that is an OOD issue in general: Right, the point being that "LSP" is not a rule that should be followed, it's something to "know" and "consider" when doing significant restricting of functionality. It's appropriate to question why you are doing it, and if you have a good answer to the question (as there clearly is in many cases) carrying on doing so, IMHO.
-- silky Every morning when I wake up, I experience an exquisite joy — the joy of being this signature.
