In an information processing apparatus, a SurfaceRule table having surface-layer information, a ConceptRule table having conceptual information, a connection table for correlating the two tables, and a retrieval table storing an ID of a connection table corresponding to a character string are provided...http://www.google.es/patents/US6768990?utm_source=gb-gplus-sharePatente US6768990 - Information processing apparatus and method using a conceptual database
Information processing apparatus and method using a conceptual database
