timetravel

i'm looking into using the timetravel contrib as part of a bitemporal
table implimentation - any advice or experiences on this package?
also, i'm looking for a similar means of implementing valid_times (as
opposed to transaction times) - i've done it in plruby but it would be
nice to have it in 'c'. any information on the above *greatly*
appreciated.

-ara

ahoward@fsl.noaa.gov