ISR11 Scientific Report No. ISR-11 Information Storage and Retrieval An Experimental Investigation of Automatic Hierarchy Generation chapter G. Blomgren A. Goodman L. Kelly Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. AMi[OCRerr]C([OCRerr]NET( INFORMATION COi[OCRerr]STFDR[OCRerr][OCRerr] INDE[OCRerr] O2[OCRerr]®O4O4®OOOO6©5 © DETECT, MATERIAL. ROLE TECHN ADVICE REPRODUCT I[OCRerr]R PROCESS SCIENCE CROSS- PU8LISH SEARCH PHOTO DICTIORARY COMPOSE [OCRerr] ®%3oIo2®o5®.®[OCRerr]oo89®©5©9 STATIST DOCUMENT ORGANI- ARTICLE PLAN LIRRAN FILE ANAL CHOICE COIIPOUND DATA, CENTER TAPE CAREER ENPERI- COLLECT ZATION/\ \/ PACTS I MENT PROGRAM [OCRerr] ® 08 DETAIL READ[OCRerr]® @ ©[OCRerr] INVESTIGATOR MESSAGE PREPARE ACADEMIC SCHOOL DESCRIPTOR DISCLOSURE [OCRerr] PERMUTE FACTOR PAPER SAMPLE GENERATED HIERARCHY CUTOFF `0.56 )GRANDFATHER-DRANDSON RELATIONS NOT SNO[OCRerr]N-- TO SIMPLIFY FIGURE.) PARENT TO SON UUSHIPS PROGRAMMING 8ROTHERS Sample Hierarchy