The methods of conflict resolution of names in programming languages that allow multiple inheritance were researched. Those methods are based on the linearization of the classes. The idea of linearization is to reduce multiple inheritance to single, in which the problem of selecting a suitable attribute is solved trivially. The definition of a hierarchy of classes is introduced. The property of monotonicity was clarified. The idea of monotonicity is that all the attributes that the class inherits either identified in its direct ancestors, or inherited them. Methods of conflict resolution used in programming languages CLOS and LOOPS were formally defined.
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