P. Pouyioutas et G. Loizou, DEPENDENCIES FOR AN EXTENDED OBJECT-ORIENTED DATABASE MODEL, International journal of computer mathematics, 55(1-2), 1995, pp. 1-17
Herein we extend the object-oriented database model via the concept of
object inheritance, and call the resulting model, the extended object
-oriented database model. We then formalize this model and thereafter
we investigate path functional dependencies, inequality dependencies a
nd general dependencies. General dependencies subsume both path functi
onal dependencies and inequality dependencies.