| 摘要 |
<P>PROBLEM TO BE SOLVED: To search for a document included in a second document group constituted by plural documents by using a search result of searching a first document group constituted by plural documents. <P>SOLUTION: A document search method includes: a search reception step of receiving a specific expression or a specific category item for categorizing a document as a search condition; a first search step of searching for a predetermined document included in a first document group; a second search step of specifying related information, searching for a second document group using the related information as a search condition, specifying a category item given to a document extracted by the search and re-searching for the second document group on the basis of the specified category item; a third search step of specifying related information and searching for the first document group using the related information as a search condition; and an output step for specifying an expression or a category item included in the searched document, and calculating, and outputting, a degree of identicalness with the expression or category item received as the search condition in the search reception step. <P>COPYRIGHT: (C)2013,JPO&INPIT |
