Re: Another view on analysis and ER

From: David Cressey <cressey73_at_verizon.net>
Date: Tue, 18 Dec 2007 11:55:05 GMT
Message-ID: <tyO9j.5977$L91.2532@trndny05>

"rpost" <rpost_at_pcwin518.campus.tue.nl> wrote in message news:c1f35$4766eca5$839b4533$16718_at_news1.tudelft.nl...
> David Cressey wrote:
>
> [...]
>
> >The question of whether it's "the same entity" or "a different entity "
is
> >also moot.
>
> Until you consider other relations referring to the same entity.
> Their attributes may or may not have to be updated as well.
>

Are they really "referring to the same entity"? Or are they "referring to data values that describe and/or identify some entity"? Can an entity be identified without data? Received on Tue Dec 18 2007 - 05:55:05 CST