Yep, that pretty well sums it up. I've been reading Hugh Darwen for a couple of days and working through Tutorial D and the Rel implementation. 6th normal form brings its own bag of headaches, and while I tend to avoid NULLs if I can help it, I'm not sure which set of headaches I'd prefer to deal with, if given an either-or choice.

I'm a little surprised that this thread hasn't generated more traffic. It could be that everyone has already staked out their positions and they feel no need to re-defend them.