Lina Al-Jadir, Michel Léonard. Multiobjects to Ease Schema Evolution in an OODBMS. In Tok Wang Ling, Sudha Ram, Mong-Li Lee, editors, Conceptual Modeling - ER 98, 17th International Conference on Conceptual Modeling, Singapore, November 16-19, 1998, Proceedings. Volume 1507 of Lecture Notes in Computer Science, pages 316-333, Springer, 1998. [doi]
The multiobject mechanism is a pertinent way to implement specialization in an object database and differs from the classical mechanism used in most object-oriented database systems. It supports multiple instantiation, automatic classification and object migration. Consequently it is well suited to take into account schema evolution. It makes schema changes more pertinent, easier to implement, and less expensive than with the classical implementation of specialization indeed. The multiobject mechanism is implemented in the F2 database system which supports schema evolution.