Information-providing apparatus and information-providing method

摘要

According to the present invention, among related information candidates that may be provided as related information, candidates with high similarity factors indicating high extents of similarity to delivery information delivered to a subject user are disqualified. In addition, related information candidates originating from the same information source as that of the delivery information having been obtained for the subject user or originating from a well-known information source are disqualified. Also, any portion of a related information candidate that remains unchanged in different versions of the candidate information is disqualified. Then, the related information to be provided to the user is selected from the qualified related information candidates.