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. Bass, "Role of a Historian in a Database Management System," in IEEE Software, vol. 4, no. , pp. 35-40, 1987.