Issue No.02 - March/April (1987 vol.4)
L.J. Bass , Carnegie Mellon University
Traditionally, a database manager tracks only transactions ? an insufficient way to maintain a complete history. This multilevel system tracks three history levels: character, transaction, and global action.
L.J. Bass, "Role of a Historian in a Database Management System", IEEE Software, vol.4, no. 2, pp. 35-40, March/April 1987, doi:10.1109/MS.1987.230094