On Sun, Jun 11, 2006 at 10:18:11AM +0900, Michael Glaesemann wrote: > > On Jun 11, 2006, at 5:15 , Bruno Wolff III wrote: > > >I think you might want to reconsider your design. It works well for > >dates > >because sets of dates are made of of isolated points and such sets are > >both open and closed. If you are using time, I think it will be > >more convenient > >to use a closed, open representation. > > Under design I proposed, closed-closed and closed-open are just two > different representations of the same range: to the commonly used > notation, the closed-open range [p1, p2) is equivalent to the closed- > closed range [p1, next(p2)], where next() is the successor function. Why try messing aronud with a successor function when you can just use < instead of <= ? -- Jim C. Nasby, Sr. Engineering Consultant [EMAIL PROTECTED] Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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