Re: Date, the relational model and the application (software layer)

Christopher Browne <cbbrowne_at_acm.org> wrote in message news:<c3cc55$26k1tg$1_at_ID-125932.news.uni-berlin.de>...
> A long time ago, in a galaxy far, far away, Leandro Guimarães Faria Corsetti Dutra <leandro_at_dutra.fastmail.fm> wrote:
> > On Thu, 18 Mar 2004 07:37:36 +0000, mountain man wrote:
> >> What competitive other theories of data modelling exist aside from
> >> the relational model. ?
> >
> > None.
> >
> > So-called hierarchical and network models aren't theories, but
> > rationalisations of old practics.
> >
> > Similarly, MV and OO are more techniques. They aren't really
> > theories, at least not sane ones.
> >
> > Perhaps one could define a graph model, to generalise these
> > above, but I guess that people who know enough to do that are wise
> > enough to not start trying, because it would most certainly result
> > in more complication and less power than the RM.
>
> A good way to put it is that they do not represent systematic or
> comprehensive theories.
>
> They may provide "techniques" for solving problems, but are not, in
> and of themselves, comprehensive ways of characterizing data.

And you are thinking that the relational model is both consistent and complete? --dawn Received on Fri Mar 19 2004 - 23:09:59 CET