Patent ID: 7797315

Claim:
A retrieval system for retrieving a document from among a plurality of documents, comprising: a search conditions input unit configured to receive search conditions input by a user on a retrieval device; a retrieval unit configured to retrieve, from among a plurality of documents stored in a storage device, at least one document satisfying the search conditions received by the search conditions input unit; a specifying unit configured to specify an event at an installation site of the retrieval device, according to scheduling information regarding a schedule of events at the installation of the retrieval device; a determination unit configured to identify a document related to the event specified by the specifying unit from among a plurality of documents retrieved by the retrieval unit, and determine priority levels of the plurality of retrieved documents so as to assign a higher priority level to the identified document as compared to priority levels assigned to other of the plurality of retrieved documents; a display unit configured to display the plurality of documents retrieved by the retrieval unit, the displayed documents being arranged in accordance with the priority levels determined by the determination unit; and a device information storage unit configured to store device information describing the installation site of the retrieval device, wherein the specifying unit specifies an event at the installation site described by the device information, and wherein the determination unit determines the priority level according to a difference between a time of the event specified by the specifying unit and a time when the retrieval is executed by the retrieval unit.