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. VIII-19 The List Structure fr[OCRerr] which the Hierarchy is Constructed Cuto[OCRerr]f = .200000 CONCEPT NU[OCRerr]3ER 1 CONCEPT NUMBER 69 PARENTS PARENTS BROTHERS BROTHERS 50 SONS 60 SONS CONCEPT NUMBER 50 CONCEPT i[OCRerr]IA'IBER 91 PARENTS PARENTS BROTHERS 69 BROTHERS 100 SONS SONS CONCEPT NUMBER 60 CONCEPT [OCRerr] 100 PARENTS 1 PARE[OCRerr][OCRerr]S BROTHERS BROTHERS 91 SONS SONS All Other Concepts have No Parents, i[OCRerr] Brothers, and No Sons. List Structure, Continued -- Isolated Concepts 2 3 [OCRerr] 5 6 7 8 9 10 11 12 13 l[OCRerr] 15 16 17 i8 19 20 21 22 23 2[OCRerr] 25 26 27 28 29 30 31 32 33 34[OCRerr] 35 36 37 38 39 11,0 111 112 113 1111 11[OCRerr] 116 117 118 119 51 52 53 511 55 56 57 58 59 61 62 63 611 65 66 67 68 70 71 72 73 711 75 76 77 78 79 80 81 82 83 811 85 86 87 88 89 90 92 93 911 95 96 97 98 99