Database Logging

The auditing of database changes has been somewhat inspired by the following:

www.dbforums.com/microsoft-access/999215-audit-trail.html

www.matthidinger.com/archive/2008/05/08/linq-to-sql-audit-trail.aspx

The representation of the transition of values was taken from here:

www.testbench.in/CO_09_TRANSITION_BINS.html