Re: MV Keys

From: David Cressey <>
Date: Thu, 02 Mar 2006 14:57:18 GMT
Message-ID: <iJDNf.676$ZL1.483_at_trndny09>

"Jon Heggland" <> wrote in

> > Repeating groups are still a bad idea, regardless of whether we
> > allow nested relations or not. I don't agree that allowing
> > nested relations means we're going to want to start using
> > repeating groups.
> How do you define "repeating group" as opposed to "nested relation",
> then? I assume "nested relation" and "relation-valued attribute" is the
> same thing.

This reminds me of the definition of "tuple" set forth elsewhere.

Is a"tuple valued attribute" the same thing as a "relation valued attribute, constrained to a cardinality of one"? Received on Thu Mar 02 2006 - 15:57:18 CET

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