| 摘要 |
<p>The present invention relates to a historical information retrieval system based on period query, capable of retrieving historical information based on the period query reflecting time attribute and obtaining intuitive information. The historical information retrieval system includes a historical information managing unit which processes and stores the historical information collected based on the time query for retrieving the contents of the information based on the change of time, a historical information structuring unit which extracts, groups, and structures a relation between historical objects retrieved from the historical information managing unit according to the period query, and a historical information providing unit which generates input query in the historical information managing unit and provides the historical object information structured in the historical information structuring unit.</p> |
