Re: Data Constraints AND Application Constraints
From: David Cressey <david.cressey_at_earthlink.net>
Date: Sat, 19 Mar 2005 12:28:28 GMT
Message-ID: <MVU_d.15259$qf2.6227_at_newsread2.news.atl.earthlink.net>
Date: Sat, 19 Mar 2005 12:28:28 GMT
Message-ID: <MVU_d.15259$qf2.6227_at_newsread2.news.atl.earthlink.net>
"David Cressey" <david.cressey_at_earthlink.net> wrote in message news:OuU_d.15244$qf2.8577_at_newsread2.news.atl.earthlink.net...
> I'd like to suggest that constraints are really proscribed actions on
data.
> As such, they can become part of the data definition.
The above is a mistake on my part. Constraints are really sets of
proscribed values of data.
Actions are proscribed as a consequence if their effect would be to
propagate proscribed values.
Received on Sat Mar 19 2005 - 13:28:28 CET