Default Reasoning and Inheritance Mechanisms on Type Hierarchies.

http://doi.acm.org/10.1145/800227.806889 db/conf/sigmod/Carbonell80.html Jaime G. Carbonell Default Reasoning and Inheritance Mechanisms on Type Hierarchies. 107-109 PINGREE1980/P107.pdf 1980 conf/sigmod/80p Workshop on Data Abstraction, Databases and Conceptual Modelling db/conf/sigmod/pingree80.html#Carbonell80