Re: Database design, Keys and some other things

"JOG" <jog_at_cs.nott.ac.uk> wrote in message news:1128029620.610189.274300_at_f14g2000cwb.googlegroups.com...

> Proposition:
> I am putting forward for discussion that Codd's Information Principle
> (based on an Liebniz/essentialist viewpoint that an entity is defined
> by its attributes, and is nothing more and nothing less than the
> aggregate of them, [Celko - D&DB]) is not a complete model of the
> nature of information. Rather I am proposing that there is no single
> attribute of an entity that can be gauranteed to act as a permenant
> immutable reference for it (nominalism - there are no universals), and
> so an external one to represent our concept of an entity be provided.

You are discussing here
a) entity = abstract concept
or
b) entity = object ?

if a), why do you need to reference it ? Received on Fri Sep 30 2005 - 04:54:08 CDT