Re: Codd's Information Principle
From: paul c <toledobythesea_at_oohay.ac>
Date: Mon, 02 Nov 2009 01:27:39 GMT
Message-ID: <fAqHm.51166$PH1.30497_at_edtnps82>
Date: Mon, 02 Nov 2009 01:27:39 GMT
Message-ID: <fAqHm.51166$PH1.30497_at_edtnps82>
Bob Badour wrote:
...
> I suspect you simply do not include enough context to decipher what you
> are saying. If I have a relation variable, R, at any given time, its
> extension is simply its value. Is it not? Since R can have different
> values at different times, it can have more than one extension; albeit,
> only one at a time.