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Re: Codd provided appropriate mathematics ... (was Re: Relational and MV (response to "foundations of relational theory"))

From: Marshall Spight <mspight_at_dnai.com>
Date: Fri, 27 Feb 2004 03:01:09 GMT
Message-ID: <Vpy%b.404713$I06.4394730@attbi_s01> 





"Tom Hester" <$$tom_at_metadata.com> wrote in message news:aff87$403e41e1$45033832$6812_at_msgid.meganewsservers.com...


> Both are non-1NF.  Codd defines first normal form in terms of simple

> domains.  That is the interpretation of a single element in a domain can

> only be an atomic element of a set.  It cannot be further decomposed.




That definition is not enough to exclude lists. Consider the set L of
all lists; an element l in L is an atomic element of L.




Marshall
Received on Thu Feb 26 2004 - 21:01:09 CST












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