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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@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 - 06:28:28 CST












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