Path: dp-news.maxwell.syr.edu!spool.maxwell.syr.edu!drn.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.news2me.com!news.glorb.com!meganewsservers.com!feeder2.on.meganewsservers.com!feed.cgocable.net!pd7cy1no!shaw.ca!pd7tw1no.POSTED!53ab2750!not-for-mail X-Trace-PostClient-IP: 24.81.152.157 From: paul c User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.databases.theory Subject: Re: What does this NULL mean? References: <7u7of.2299$V7.264@news-server.bigpond.net.au> <1134666455.369536.216540@g43g2000cwa.googlegroups.com> <7Pnof.11578$V7.11250@news-server.bigpond.net.au> <1134694213.377635.258420@g43g2000cwa.googlegroups.com> <1134704511.203946.223690@g47g2000cwa.googlegroups.com> In-Reply-To: <1134704511.203946.223690@g47g2000cwa.googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Lines: 13 Message-ID: Date: Fri, 16 Dec 2005 04:41:24 GMT NNTP-Posting-Host: 64.59.144.75 X-Complaints-To: abuse@shaw.ca X-Trace: pd7tw1no 1134708084 64.59.144.75 (Thu, 15 Dec 2005 21:41:24 MST) NNTP-Posting-Date: Thu, 15 Dec 2005 21:41:24 MST Organization: Shaw Residential Internet Xref: dp-news.maxwell.syr.edu comp.databases.theory:35200 dawn wrote: >... > > I agree with the first part of your sentence, but not the second. > Theory, if defined in terms of work done with a mathematical model, is > not (very) subjective, but selecting a database theory is not an exact > science. Cheers! --dawn > fine. but this group is not called 'mathematical.models'. p