IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval Document Length 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. Abstract, Stem x Abstract, Thesaurus Full Text, Stem A Full Text, Thesaurus Precision Precision 1.0 1.0 0.8 0.8 0.6 0.6 0.4 0.4 0.2 0.2 - `````[OCRerr] Recall I I I I I [OCRerr] Re( 0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1.0 ADI, 35 [OCRerr]equests Performance Results Comparing Abstracts and Full Text on Two Dictionaries. Fig. 19