Re: cdt
From: Laconic2 <laconic2_at_comcast.net>
Date: Mon, 7 Jun 2004 09:54:19 -0400
Message-ID: <3N-dnZ1utJaq7lnd4p2dnA_at_comcast.com>
Date: Mon, 7 Jun 2004 09:54:19 -0400
Message-ID: <3N-dnZ1utJaq7lnd4p2dnA_at_comcast.com>
(re: "location")
"Alan" <alan_at_erols.com> wrote in message
news:2ij96jFnk21uU1_at_uni-berlin.de...
> Not relevant to a logical model at all.
Except when discussing the utility of a logical model in the context of a larger project.
The fact that the RDM establishes relationships without pinning down
locations is part of the reason why it has more data independence than some
other models. This is turn is one of the things that make the RDM a good
candidate for logical modelling.
I think that the term "access paths" in the Codd 1970 paper is related to
what we often call "location". What do D&D have to say about "access paths