Re: Storing derived and derivable data

From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Fri, 05 May 2006 01:05:46 GMT
Message-ID: <Kxx6g.3358$A26.87698@ursa-nb00s0.nbnet.nb.ca>

Kenneth Downs wrote:

> dawn wrote:
>

>> Is there database theory that includes identification of
>>
>> 1. the fact that values for an attribute either were or could have been
>> derived?
>> 2. how values for an attribute were derived?
>> 3. how values for an attribute could have been derived?
>>

>
> Dawn, hello! Long time no see.
>
> I saw your post and decided it was time to end my long exile, you have
> asked the questions that are at the heart of my company and project.
>
> In order to even begin to deal with this question, you have to deal with
> the 800lb gorilla called "Normalization", which forbids derived data. I
> wrote an essay on that some months ago, which is here:
>
> http://docs.secdat.com/index.php?gppn=Normalization+and+Automation
>
> The states basically that derived data is part of life, and since
> normalization can't deal with it, normalization is not enough to guide
> serious application development. But you also can't throw it away,
> because it gives good things.

Yikes! Another self-aggrandizing ignorant! Plonk. Received on Thu May 04 2006 - 20:05:46 CDT