To enable the utilization of a definition or definitions once made as the definitions of a similar object, a set of conditions for similarity including one or more conditions is defined and a set of definitions, which explicitly or inexplicitly indicates one or more definitions, of which at least one will be applied, and a similar object is searched for. If the set of definitions is related to an object which was used as the basis for defining the set of conditions for similarity, the set of definitions is applied to the object found. If the set of definitions is related to an object to be found, the set of definitions of the object found is applied to the object which was used as the basis for defining the set of conditions for similarity.