On Mon, Feb 20, 2006 at 19:24:05 +0100,
  Karsten Hilbert <[EMAIL PROTECTED]> wrote:
> 
> I *could*, of course, use something like '999 years' as a
> special value to indicate "no upper limit" figuring that no
> one is going to live that long in the foreseeable future.

I would think that specifying a value well beyond the current life
expectency for people would be the simplest solution. Since it doesn't
have to be treated like a magic value and can used consistantly with
other values in the same column.

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