Re: Is this bad design ?
Date: Thu, 11 Mar 2004 13:18:35 -0500
Message-ID: <XpOdnZYtkI8lMM3dRVn-ig_at_golden.net>
"ben brugman" <ben_at_niethier.nl> wrote in message
news:405031f0$0$6574$4d4ebb8e_at_read.news.nl.uu.net...
> >
> > Yes, it is a bad design. The Valid_Mothers relvar has no need for the
> > boolean attribute and the Valid_Children relvar has no need for the
> boolean
> > attribute. Valid_Children has a simple reference to Valid_Mothers.
>
> How do you come to the conclusion that there is no need for the
> boolean attribute ?
How do you conclude there is a need?
> > The existence of a tuple suffices as a statement of truth, which is why
> DEE
> > and DUM are such important relations.
>
> Don't use TLA without explaining them.
> There is far to much TLA overloading to understand them just from context.
Neither DEE nor DUM are acronyms. They are named relations and both are well described in the literature. Received on Thu Mar 11 2004 - 19:18:35 CET