ISR11 Scientific Report No. ISR-11 Information Storage and Retrieval Design Criteria for Automatic Information Systems chapter M. E. Lesk G. Salton Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. Full Null X[OCRerr]X Harris Three ~RE~"ISl0N 0' 0.8 0. 6' ¾ K 0 0.4 - 0 0 0.2 I a RECALL 0 0.2 0.4 0.6 0.8 ¼7o a) IRE- 2 (I? requests) 0 Abstract Null Abstract New QS PRE(' ISION -`I PREC SION 0[OCRerr]0 Abstract Null Abstract Thesaurus 1.0' 1.0' K 0.8' 0.8' 0.6 ox 0.6 0.4 0.4' 0.2 0.2 I I 1RECALL RI I j a I 0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1.0 b) Cranf jeId (42 requests) c) ADI (35 requests) Comparison of Synonym Recognition (Thesaurus) with Word Stem Matching Process Fig. 8