Re: object algebra
From: Marshall Spight <mspight_at_dnai.com>
Date: Wed, 25 Feb 2004 07:47:23 GMT
Message-ID: <fqY_b.120045$uV3.620686_at_attbi_s51>
> Sometimes it is reality doing the hand-waving. For example a person
> may not have any eyes, but the relation's heading has eyeColor
> defined.
Date: Wed, 25 Feb 2004 07:47:23 GMT
Message-ID: <fqY_b.120045$uV3.620686_at_attbi_s51>
"Neo" <neo55592_at_hotmail.com> wrote in message news:4b45d3ad.0402241308.680a4901_at_posting.google.com...
>
> Sometimes it is reality doing the hand-waving. For example a person
> may not have any eyes, but the relation's heading has eyeColor
> defined.
But it wasn't reality that defined that relation, it was you! *You* declared that all persons have an eye color, so it doesn't seem fair to complain about that fact now.
And anyway, what's so hard about declaring something like enum EYE_COLOR { Blue, Green, Brown, Hazel, Gaping_Unblinking_Sockets }
Hey, what if the person's eyes are of two different colors? Or what if they only have one eye; don't we want to record that too?
Marshall Received on Wed Feb 25 2004 - 08:47:23 CET