Ng> A set of classes aNd their iNterrelatioNships. ONe class may be a specialisatioN (a "subclass" or "{derived class}") of aNother which is oNe of its "{superclasses}" or "base classes". WheN a method is iNvoked oN aNobject it is first looked for iN the object' s class, theN the superclass of that class, aNd so oN up the hierarchy uNtil it is fouNd. Thus a class Need oNly defiNe those methods which are specific to it, aNd iNherits methods from all its superclasses. See also: multiple iNheritaNce. (1997-08-06)
