Re: Can we solve this -- NFNF and non-1NF at Loggerheads
Date: Wed, 09 Feb 2005 16:00:08 +0100
Message-ID: <n79k01hei17hfrm2mhsijobrd0f46lqm72_at_4ax.com>
On Tue, 8 Feb 2005 18:34:06 -0600, "Dawn M. Wolthuis" <dwolt_at_tincat-group.comREMOVE> wrote:
>This is either a quote or variation on one from George Box "All models are
>flawed, but some are useful"
>
>A model is like a metaphor -- it does not have to map every aspect of
>reality, just those that are useful for whatever you are trying to do.
"Model" is an overloaded word. Some meanings of the word have little to do with others.
http://dictionary.reference.com/search?q=model
The Relational Model is NOT a model of the physical world.
>Relational theory gives one approach to modeling data and it has pros & cons
>compared to other models.
Nobody was able to show any objective "con" compared to the other known data models.
> I think someone was right on when they suggested
>that if Date & Darwin want to redefine 1NF, then they should call the new
>model by another name.
It was not a redefinition, it was a clarification. 1NF never changed but it was misinterpreted (in the past) by almost everybody, Date included.
Regards Received on Wed Feb 09 2005 - 16:00:08 CET