IRS13 Suffix 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. Stem 0 IS' Suffix Stem 0 Suffix `S' x Precision Precision 1.0 1.0 0.8 - 0.8 0.6 0.6 0.4 OA 0.2 0.2 I I I I I 0 0.2 0.4 0.6 0.8 1.0 a) ADI, Abstracts, 35 Requests Recoil I I I I [OCRerr] Recc 1.0 0 0.2 0.4 0.6 0[OCRerr] b) ADI, Text, 35 Requests Performance Curves Comparing Stem and Suffix `S' Dictionaries on the ADI Collection, using Abstracts and Full Text. Fig. 3