5. The apparatus according to claim 4 , wherein the named entity dictionary update unit defines the properties of the named entity to include authority data comprising a named entity corresponding to a concept (class) of the ontology schema, a terminology classified as the named entity, identification of the terminology, a representative terminology, and identification of the representative terminology, and connects and stores the properties of the named entity in one format.
4. The apparatus according to claim 1 , wherein the named entity dictionary update module includes: a search result determination unit for determining whether or not the terminology is searched from the named entity dictionary as a result of the search; a named entity dictionary update unit for estimating the named entity of the terminology using the mining rule and storing the estimated named entity in the named entity dictionary depending on a user's selection, if the terminology is not searched from the named entity dictionary and the mining pattern is searched from the mining rule database as a result of the determination; and a control unit for controlling the named entity dictionary update unit to define and store properties of the named entity depending on a result of the determination of the search result determination unit.