Re: Negative Numbers in "Identity" or" Autonumber" fields

On Mar 21, 4:00 am, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
> Marshall wrote:
> > On Mar 20, 10:31 am, "JOG" <j..._at_cs.nott.ac.uk> wrote:
>
> >>[...] Nothing in a
> >>proposition should ever be hidden from the user. Propositions come
> >>from outside of the logical layer after all. If an attribute is an
> >>identifier then it clearly impacts on identifying items in the real
> >>world.
>
> > I buy the "nothing should be hidden" argument, but I can't
> > decide if a domain that only supports equality is hiding
> > anything or not.
>
> It has to have at least one possible representation.

Can you elaborate? Why does it need at least one? What breaks if it doesn't?

Marshall Received on Wed Mar 21 2007 - 09:33:50 CDT