Information retrieving system, information retrieving method, and information retrieving program

Abstract

In this invention, a database in which a keyword and an attribute of the keyword are stored together with a document ID for discriminating a source document is arranged, at least one keyword and/or retrieval key constituted by attribute information which is not specified as a keyword is input, and the database is retrieved on the basis of the keyword and/or the attribute of the attribute information. As a result, the source document can be specified by the keyword input as the retrieval key, and retrieval intention is reflected by the attribute information input as the retrieval key.