| 摘要 |
<p>An equivalency decision system (10) is provided with a specifying means (11) and a decision means (12). The specifying means (11) specifies a portion that is hard to manually modify from each of electronic documents in a document database. The decision means (12) decides whether or not the portion specified by the specifying means (11) is consistent among a plurality of electronic documents. If it is consistent among them, the decision means (12) specifies those documents as a plurality of similar electronic documents. This enables to specify an electronic document which is slightly modified after partially or fully citing another electronic document, from the document database at high speed.</p> |
