Car Evaluation data set 1: Description. Car Evaluation Database was derived from a simple hierarchical decision model. The model evaluates cars according to six input attributes: buying, maint, doors, persons, lug_boot, safety. Because of known underlying concept structure, this database may be particularly useful for testing constructive induction and structure discovery methods. 2: Type. Classification 3: Origin. Real world 4: Instances. 1728 5: Features. 6 6: Classes. 4 7: Missing values. No 8: Header. @relation car @attribute Buying {vhigh,high,med,low} @attribute Maint {vhigh,high,med,low} @attribute Doors {2,3,4,5more} @attribute Persons {2,4,more} @attribute Lug_boot {small,med,big} @attribute Safety {low,med,high} @attribute Acceptability {unacc,acc,vgood,good} @inputs Buying, Maint, Doors, Persons, Lug_boot, Safety @output Acceptability