> Its called a "temporal database".
> Usually its intended for medical or police databases where
> you need a hind sight. i.e. if today is 31/12/2005, what did we know at
> 20/12/2005.
> for example, for a doctor appearing at court and required to testify
> what he knew at 20/12/2005.
What he "can have known" not "what he knew".
With GnuMed we are running a trigger based auditing solution
which so far works nicely.
Karsten
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GPG key ID E4071346 @ wwwkeys.pgp.net
E167 67FD A291 2BEA 73BD 4537 78B9 A9F9 E407 1346