| 摘要 |
<p>Provided is a data retrieval system having free retrieval means (9) including higher retrieval item select means (9A) for selecting a higher retrieval item for type items, and lower retrieval condition select means (9B) for selecting a lower retrieval condition on the basis of the higher retrieval item selected. The data retrieval system widens the degree of freedom for retrieval, and facilitates the retrieval even in the case of a number of massive data items, so that it can make the hit more reliable.</p> |
