ORGANIZATION OF A RETROSPECTIVE DOCUMENT RETRIEVAL SYSTEM BASED ON FRAGMENTS (L'ORGANISATION D'UN mytmE ATROSPECTIF POUR L'ACCES DE DONNtS D'UNE BANQUE D'INFORMATION BASt SUR DES FRAGMENTS) US DEPARTMENT OF HEALTH EDUCATION WELFARE

A description of a retrospective document retrieval system is given in which equifrequent fragments are used as language elements for compression coding and retrieval. The critical parameters governing the system are identified, and restrictions imposed by the parameters on the selection of fragments are outlined. Changes necessary in the processing of a query are mentioned and two conditions are postulated for the successful operation of a fragment base retrieval system. References are included. (Author/KKC) ORGANIZATION OF A RETROSPECTIVE DOCUMENT RETRIEVAL SYSTEM BASED ON FRAGMENTS (L'ORGANISATION D'UN mytmE ATROSPECTIF POUR L'ACCES DE DONNtS D'UNE BANQUE D'INFORMATION BASt SUR DES FRAGMENTS) US DEPARTMENT OF HEALTH EDUCATION WELFARE NATIONAL INSTITUTE OF EDUCATION TH.S 00CuMEN f HAS BEEN REPRO Ot.CE0 EXACTLY AS RECEIVED ROm -HE PERSON OR ORGarvezAtiON ORIGIN IT POINTS Or VIE.. OR OPINIONS Sr A !ED 00 ROT NECESSARILY REPRE SENT OCC,CoAL %4TIONIAL IN)TITUTE Os. EOveA T.0.4 POS. 7,0% OR POI. ,Cv