Instance (or object) classification in a knowledgebase managementsystem is the very same problem as view determination in an object DBMS,whereviewsare subsets of classes intensionally defined by constraints. Maintainingthe relationship betweenan object andits current viewswhenthe object evolvesis a difficult andcostly problem.Weproposea solution for instance classification basedon a partitioning of the object space obtained through a static analysis of the properties defining the viev, s. Fourkinds of properties are considered: domainconstraints, inter-attribute dependencies, dynamic(past temporal)constraints, andlinear constr:,.ints.