From: Peter Hanusiak Newsgroups: comp.databases.theory Subject: Re: OT look at my project AlgebraDB :) Date: 21 Apr 2001 12:26:06 GMT Organization: Slovak Telecom Lines: 18 Message-ID: <987855944.100007@cdwork.cvt.stuba.sk> References: <987068349.898048@cdwork.cvt.stuba.sk> <987137240.366548@cdwork.cvt.stuba.sk> NNTP-Posting-Host: cdwork.cvt.stuba.sk X-Trace: news.telecom.sk 987855966 3917 147.175.1.11 (21 Apr 2001 12:26:06 GMT) X-Complaints-To: usenet@news.telecom.sk NNTP-Posting-Date: 21 Apr 2001 12:26:06 GMT User-Agent: tin/1.4.1-19991201 ("Polish") (UNIX) (Linux/2.2.17 (i686)) Cache-Post-Path: cdwork.cvt.stuba.sk!hanusiak@sozo.fns.uniba.sk X-Cache: nntpcache 2.4.0b2 (see http://www.nntpcache.org/) mikito harakiri wrote: > Cool. I didn't realize that characteristic functions are natural generalization > of sets. I mean, I was so blinded by goofy bags, that missed that obvious > fact... :) >> >>I'm searching some others database fans, which wants help to this project. >> > What about applications? For example, constraint databases (which is, btw, is > another popular generalization of classic relational theory;-) have immediate > and direct applications in spatial area... At this moment I only want to make some demonstration engine. I need to do some query optimalization engine, which isn't at this moment ready. But you can try some query commands which can compute transitive clossure and so on. Peter Hanusiak