[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: RELAX to ISO
"Bullard, Claude L (Len)" wrote: > > Business rules as an artificial category. Why artificial? Because it sometimes seems that people say "business rules" when they mean "every constraint that cannot be represented by my schema language". So a business rule is a constraint (or function) that the database designer can leave to the applications programmers while (s)he concentrates on DDL or whatever. So "business rules", used like that, are an artifact of the limits of schema languages which either cannot express dynamic constraints between data or which are only useful for defining data rather than usages of data in various circumstances. But, of course, I am aware that "busines rules" are also used in another way, to mean functions rather than constraints per se. Rick Jelliffe
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