Re: [Gnumed-devel] Demographics schema - urb postcode not null

[Karsten Hilbert]

On Sat, Oct 08, 2011 at 12:59:41PM +0200, Hilbert, Sebastian wrote:

> I was under the impression that NULL can be different from unkown.

What, then, NULL is ?

> While being NULL it is not enforced uknown is something that can be enforced.

Only if one explicitely models <unknown> as some dummy value
(-1, maxint, infinity, 00.00.0000, 'unknown' or similar crap).

Karsten
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