Tablelog is a contributed PostgreSQL module that uses a trigger to log
any INSERTs, UPDATEs and DELETEs on a specific table into another table.
The second part of tablelog is able to restore the state of the original
table or of a specific row for any time in the past.

Author: Andreas Scherbaum <ads-pgfoundry @nospam@ wars-nicht.de>
WWW: http://tablelog.projects.postgresql.org/