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Re: Nulls, integrity, the closed world assumption and events

From: Marshall <marshall.spight_at_gmail.com>
Date: 21 Jan 2007 21:48:06 -0800
Message-ID: <1169444886.470011.257830@51g2000cwl.googlegroups.com> 





On Jan 21, 9:35 pm, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:


>

> Codd convinced one user group struggling with the best way to deal with

> "5 difficult problems in data management" by writing one-liners for each

> of the 5 problems.




Is this referring to a specific paper? I'd be interested to see what
were considered difficult problems in the 1960s. If you have a cite
I'd like to have it.




Marshall
Received on Sun Jan 21 2007 - 23:48:06 CST












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