IRS13 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. Title, Thesaurus (Harris 3) Ti tie, Thesaurus -3 (Harris) 0 Title, Thesaurus 0 Abstract, Thesaurus (Harris 3) Abstract, Thesaurus 3 (Harris) x Abstract, Thesaui x (Harris )¼ Ision Precision Precision 1.0 - 1.0 0.8 - 0.8 3½\\ 0.6 0.6 o\X\N 0.4 0.4 - 0.2 0.2 I I I I I I I I I I I I I I 0.2 0.4 0.6 0.8 1.0 IRE-3, 3[OCRerr] Requests Recall 0 0.2 0.4 0.6 0.8 CRAN-l, [OCRerr]2 Requests 1.0 0 0.2 0.4 0.6 0. Recall ADI, Thesaurus-i, 35 R Performance Results C[OCRerr]paring Abstracts with Titles on Three Collections, Thesaurus Dictionary, using Precision Versus Recall Graphs. Fig. 7.