Patent ID: 8762404

Claim:
An information search device for carrying out an information search based on a search request from a user, the device comprising: at least one processor; at least one memory, the at least one memory storing instructions that when executed cause the at least one processor to perform as: a first search engine for searching a folksonomic ontology database on the basis of the search request, the first search engine identifying one or more first search categories based on the search request; a search engine index for extracting from a library ontology one or more library categories that correspond to the first search categories; a second search engine, different from the first search engine, for searching the library ontology by searching within the library categories such that the device facilitates access for the user to information in a library; and a pathfinder creation module for creating as a clue for the information search a pathfinder having a search result from the first search engine and a search result from the second search engine, wherein the search engine index comprises: a weighting module for applying to the first search categories a weight indicating a distance and similarity to a keyword in the search request; a derivation score calculation module for applying to the library categories a derivation score that is based on the weight value of the first search categories that correspond to the library categories; and a superordinate extraction module for extracting only a predetermined number of superordinate concept(s) that have high derivation scores.