IRS13 Thesaurus, Phrase and Hierarchy Dictionaries chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. VII-~8 Collection Stem Dictionary Thesaurus Dictionary and Relevant Relevant Request Rank Document Corr. Rank Document Corr. 33 09 .1512 1 09 .4100 ADI 48 70 .0977 7 48 .3062 QBl0 58 69 .0769 26 70 .1825 4 rel. 67 48 .0599 32 69 .1268 Normed4 Recal[OCRerr] .3718 Nozrned. Recall .8205 Normed. [OCRerr] .1336 Normed. Precision .6180 9 200 .3539 106 200 .2448 IRE-3 71 382 .2503 153 106 .2044 QOlS 212 106 .1630 189 382 .1815 6 rel. 309 71H .1210 283 71H .1390 498 85A .0563 301 85A .1315 691 72[OCRerr] .0000 669 72+ .0000 Normed. Recall .6191 Normed. Recall .6382 Normed. Precision .2889 Normed. Precision .2141 Retrieval Results for Two Individual Requests Comparing Stem with Thesaurus Fig. 29