A system retrieves structured documents based on first desired concept item having first concept items classified hierarchically and subordinated to first desired concept item, second desired concept item having second concept items classified hierarchically and subordinated to second desired concept...http://www.google.fr/patents/US7080067?utm_source=gb-gplus-shareBrevet US7080067 - Apparatus, method, and program for retrieving structured documents
Apparatus, method, and program for retrieving structured documents
