Le dimanche 03 février 2008, Greg Smith a écrit : > On Sun, 3 Feb 2008, Jeff Davis wrote: > > I think what he means by "bitemporal" is what CJ Date, et al., refer to > > as "fully temporal" (as opposed to semi-temporal), that is, dealing with > > time intervals rather than time points. > > >> I would suggest a book called "Temporal Data and the Relational Model", > >> by C. J. Date, Hugh Darwen and Nikos A Lorentzos to anyone who's > >> interested in temporal issues. > > I think you need to be familiar with the work set down in both that one > and the Snodgrass/Jensen "Developing Time-Oriented Database Applications > in SQL" before you can even start do anything that's actually new in this > area. Bitemporal tables show up early in that book (P44 of the PDF > http://www.cs.arizona.edu/people/rts/tdbbook.pdf )
I found the following document quite useful to grasp the concepts involved, it allowed me to decide whether I needed bitemporal feature or not (was not) :) http://rueping.info/doc/Andreas Rüping -- 2D History.pdf Hope this helps, regards, -- dim
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