METHOD FOR CONSTRUCTING A DOCUMENT DATABASE AND METHOD FOR SEARCHING INFORMATION BY MATCHING THESAURUS

摘要

A document database forming method and an information retrieval method using thesaurus matching are provided to easily form a document database by automatically forming the document database with a program, and quickly update the document database in case that a new field and term is generated, as formation of the document database is automatically changed by update of a field classification system and a thesaurus. A document is read and contents of the document are extracted(S120). An index word of the document is extracted by performing morpheme analysis for the extracted document(S140). The index word is analyzed through the thesaurus by matching with the thesaurus(S150). An analysis result is stored to the document database(S160). Thesaurus matching is analyzed by comparing more than one condition selected from a term frequency, a document frequency, a field classification frequency, and a concept word depth of the index word.