1. A computer implemented method to automatically classify a plurality of objects in a computer system by observing a role model, the method comprising: receiving a class decision , wherein said class decision is a classification of an object of the plurality of objects to a class of a plurality of classes; the computer expanding an exploration tree based on said class decision, wherein said exploration tree represents a plurality of view sequences associated with the role model, a plurality of nodes of the exploration tree represents a plurality of views, a view represents features from a plurality of features of said plurality of objects, a plurality of leaves of the exploration tree represents said plurality of classes; the computer constructing a decision tree based on said exploration tree; and classifying said plurality of objects to said plurality of classes based on said decision tree.