Re: Database design question

I might suggest the Principle of Orthogonal Design (POOD) would give
some clues. I think you might get a few more from Fabian Pascal's
_Practical Issues in Database Management_ -- especially the sections on
sub-types.

POOD ????

I thought that the inventors of POOD considered nulls to be a violation
of 1NF. The first step in avoiding nulls is therefore applying 1NF. I
thought POOD was entirely orthogonal to the issue of normal forms.

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