Document search apparatus, document management system, document search system and document search method

摘要

A document search apparatus causes a plurality of document management systems to execute a document search in parallel. The document search apparatus comprises a sending unit which sends a first query regarding a first search condition which is input to each of the plurality of document management systems, and a receiving unit which receives a result of the search from each document management system for the first query. In particular, the document search apparatus comprises a search control unit which causes the sending unit to send a second query for requesting search refinement for the first query to each document management system before receiving the results of the search from all the document management systems and after receiving the results of the search from at least one document management system of the plurality of document management systems.