Re: Does Codd's view of a relational database differ from that ofDate&Darwin?[M.Gittens]

From: Alfredo Novoa <>
Date: Wed, 22 Jun 2005 15:36:56 +0200
Message-ID: <>

On Wed, 22 Jun 2005 14:10:33 +0200, Alexandr Savinov <> wrote:

>> I don't have access to such paper, but the OODB data model does not
>> exist. OODB's use the network approach.
>There exists everything that has a reference. And vice versa: no
>reference - no object (even if it "really" exists). Once OODB has a
>reference then we assume that such a thing exists (even if it does not
>"really" exists).

OODBs exist, they are a kind of network databases, but the OO Data Model does not exist. There are many OO data models but only one Network Model and only one Relational Model.

>The whole discussion is probably about the term "model" which is going
>to be privatized and exploited by only one group with the permission to
>be used only in one context. For example, if I propose to use 3 boxes
>with paper documents identifed by real numbers for storing my data then
>is it a data model?

Of course not!

Regards Received on Wed Jun 22 2005 - 15:36:56 CEST

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