Re: cdt

From: x <x-false_at_yahoo.com>
Date: Mon, 7 Jun 2004 14:12:37 +0300
Message-ID: <40c44cb5$1_at_post.usenet.com>


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"mAsterdam" <mAsterdam_at_vrijdag.org> wrote in message news:40c44591$0$6968$e4fe514c_at_news.xs4all.nl...
> x wrote:
>
> > mAsterdam wrote:
> >>[address]
> >>A value, used to identify a location.
> >
> > What is a *location* in the context of database management ?
>
> I don't have a definition at hand. Any takers?
>
> The reason I (propose to) include [address] was to
> get a clear wedge between pointer (high misunderstanding
> frequency, not only in this newsgroup) and reference.
>
> An 'address' is strongly associated with implementation, so
> it may be somewhat easier to see that it is something you'ld
> (in general) *not* want to have in a logical model.
>
> Is a definition required? Dunno. I am open to suggestions.

A pointer is a value used to locate ...
A reference is a value used to refer ...

The difference between *locate* and *refer* is crucial here.

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Received on Mon Jun 07 2004 - 13:12:37 CEST

Original text of this message