... bi-temporal data manage-ment, Asserted Versioning is a way to begin migrating databasesand applications right away, using the DBMSs available todayand the SQL available today. As a destination, AssertedVersioning ... version tables, transac-tion datasets, staging areas and logfile data from databases. In their place, Asserted Versioning provides a standard canonicalform for bi-temporal data, that form being ... constraints, acros s all tables and all databases. We need a standard way to ask for uni-temporal or bi-temporal data. Andwe need a way to remove all temporal logic from applicationprograms,...