Path: text.usenetserver.com!out03b.usenetserver.com!news.usenetserver.com!in04.usenetserver.com!news.usenetserver.com!nx01.iad01.newshosting.com!newshosting.com!64.59.134.4.MISMATCH!pd7cy3no!pd7cy4no!shaw.ca!pd7urf2no.POSTED!53ab2750!not-for-mail X-Trace-PostClient-IP: 24.84.208.66 From: paul c User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728) MIME-Version: 1.0 Newsgroups: comp.databases.theory Subject: Re: One-To-One Relationships References: <0aIVi.160673$1y4.23786@pd7urf2no> <9e16d$474dd2e0$839b4533$20601@news1.tudelft.nl> <474dd64a$0$5285$9a566e8b@news.aliant.net> <474ebc46$0$5261$9a566e8b@news.aliant.net> In-Reply-To: <474ebc46$0$5261$9a566e8b@news.aliant.net> X-No-Archive: yes Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Lines: 26 Message-ID: Date: Thu, 29 Nov 2007 19:48:50 GMT NNTP-Posting-Host: 64.59.144.74 X-Complaints-To: abuse@shaw.ca X-Trace: pd7urf2no 1196365730 64.59.144.74 (Thu, 29 Nov 2007 12:48:50 MST) NNTP-Posting-Date: Thu, 29 Nov 2007 12:48:50 MST Organization: Shaw Residential Internet Xref: usenetserver.com comp.databases.theory:167591 X-Received-Date: Thu, 29 Nov 2007 14:48:50 EST (text.usenetserver.com) Bob Badour wrote: > David Cressey wrote: >> "Bob Badour" wrote in message >> news:474dd64a$0$5285$9a566e8b@news.aliant.net... >> ... >>> Entities are figments of our imaginations. >> >> You are an entity. > > Am I? Or am I billions of cellular entities? Or am I part of a larger > community entity? I can't imagine how to store an entity. When I hear of it having been done, I just pretend I heard tuple instead, even though I admit I can't imagine how to actually store a tuple. All I know how to do with a machine is mimic assignment. I think Codd was prepared to exclude pronouns, too. As far as a db model goes, entities seem to have use only as conversational devices, as you implied and as David C demonstrated! Tuples might not seem any better, but at least we can imagine how they are applied by operators.