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. rmo lized ~coII 20 .16 .12 )8 Stem Normalized Precision .20 - Suffix `S' 0 I Individual 8 24 Requests .16 - .12 .08 .04 0 Stem )½ Suffix `S' 8 24 24 Requests better on Stem 8 Requests better on Suttix [OCRerr] 3 Requests equal on both (75%) 24 Requests better on Stem 8 Requests better on Suffix `5' 3 Requests equal on both ADI, Text, 35 Requests Graphs of the Magnitude of the Differences in Individual Requests, Comparing Stem and Suffix `5' Dictionaries, using Normalized Recall and Precision Fig. 8