Patent attributes
An information providing system includes a content association database storing external information, in which content is divided in a chunk structure, and chunk reference information, in which reference information having a different attribute than the content is divided in a chunk structure, in association with each other. An external information similarity calculation database is built on machine learning using the external information. A processor acquires specific external information, and compares the external information with the acquired specific external information. The processor looks up the external information similarity calculation database, and calculates a similarity between the external information and the specific external information, when the external information does not match with the acquired specific external information. The processor selects first external information from the stored external information, based on the calculated similarity, and extracts chunk reference information associated with the first external information as first chunk reference information.
