Relational Model/Tasmania
Relational Model/Tasmania (RM/T) was published by Edgar F. Codd in 1979 and is the name given to a number of extensions to his original relational model (RM) published in 1970. The overall goal of the RM/T was to define some fundamental semantic units, at "atomic" and "molecular" levels, for data modelling.
Source: Wikipedia — Relational Model/Tasmania (CC BY-SA 4.0)