Re: In an RDBMS, what does "Data" mean?
From: Laconic2 <laconic2_at_comcast.net>
Date: Fri, 18 Jun 2004 15:09:27 -0400
Message-ID: <ltidnQoXXYsQoE7d4p2dnA_at_comcast.com>
Date: Fri, 18 Jun 2004 15:09:27 -0400
Message-ID: <ltidnQoXXYsQoE7d4p2dnA_at_comcast.com>
"Anthony W. Youngman" <wol_at_thewolery.demon.co.uk> wrote in message
news:gqffBeBl6x0AFwMQ_at_thewolery.demon.co.uk...
> No. Pick stores metadata in its dictionaries, and has a concept called
That's a fair enough answer to the question as stated. Data is only self
describing if somebody made it that way.
As far as "if the programmer has remembered to define it" goes, I find
that no more, and no less, of a pitfall than the REFERENCES constraint in
> ASSOCiation.
>
> With the pizza, there is no ASSOCiation defined between CHEESE and
> TOPPING, but with the invoice there is an ASSOCiation between ACCOUNT.NO
> and AMOUNT. That is, if the programmer has remembered to define it ...