Re: Attribution for modeling data with relations
Date: 3 Mar 2006 14:04:34 -0800
Message-ID: <1141423474.676171.271490_at_e56g2000cwe.googlegroups.com>
David Cressey wrote:
> "dawn" <dawnwolthuis_at_gmail.com> wrote in message
> news:1141271292.728377.41660_at_e56g2000cwe.googlegroups.com...
> > David Cressey wrote:
> > > "dawn" <dawnwolthuis_at_gmail.com> wrote in message
> > > news:1141232675.124053.15680_at_j33g2000cwa.googlegroups.com...
> > >
> > > > Does anyone know to whom should we attribute the modeling of data with
> > > > relations?
> > >
> > > I had mentioned a year or more ago that some people had used relational
> math
> > > as a basis for "inference engines" before Codd's 1970 paper (and before
> the
> > > 1969 paper that I previously didn't know about, also).
> >
> > I recalled that someone had mentioned something about it. Is the 1969
> > paper internal to IBM? Do you have a URL?
>
> I only saw a reference to the 1969 paper somewhere on-line last week.
> AFAIK, the 1969 paper was not made available to the public.
OK.
> > > Just starting with the footnotes in Codd's paper, and doing a little
> > > searching led me pretty quickly to this:
> > >
> > > www.rand.org/pubs/research_memoranda/RM5947
> > >
> > > I think this work, from 1967, predates Codd's vision of the RDM. What
> is
> > > new with codd is the application of the RDM to large shared data banks.
> >
> > And normalization.
>
> Normalization was a minor topic of the 1970 paper, IMO.
But one that took off big time when implemented in SQL. And now it is seen by many as the right way to model data - to normalize as introduced in this paper. --dawn Received on Fri Mar 03 2006 - 23:04:34 CET