IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
An Experiment in Automatic Thesaurus Construction
chapter
R. T. Dattola
D. M. Murray
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
VIII-5
ADI Collection Cranfield Collection
(82 Documents, 601 Concepts) (200 Documents, 2628 Concepts)
Sub- Number Number Sub- Number Number
Collection of of Collection of of
Number Documents Concepts Number Documents Concepts
1 16 167 1 17 635
2 10 118 2 12 300
3 9 75 3 10 480
4 17 135 4 12 406
5 13 117 5 7 291
6 13 126 6 15 460
7 9 86 7 15 525
8 7 273
9 7 271
10 6 289
11 7 281
12 7 204
13 9 325
14 12 394
15 15 516
16 12 466
17 8 310
18 6 221
19 14 516
20 9 367
21 6 218
22 9 445
23 9 425
Number of documents in more than Number of documents in more than
one subcollection: 5 one subcollection: 31
Cluster Hierarchy
Table 1