Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2

CRANV2 Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2 Main test results chapter Cyril Cleverdon Michael Keen Cranfield An investigation supported by a grant to Aslib by the National Science Foundation. Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. - 135 - 90 1" ao IO o I0 20 ,30 FIGURE 4,504P ,oo 90 l 70 - 60 J 1 _.I U 50 ," t.d cr i ,,o \\ ,o ---[OCRerr] \\ o IO 20 FIGURE 4.505P X [OCRerr] 4. 500T O-----4. 300T L 40 5o [OCRerr]o 70 8o 90 Ioo */* PRECISION SEARCH RULES A and B, 19 QUESTIONS, INDEX LANGUAGE I.l.a (FIGURES 4.500T and 4.300T) I X[OCRerr]4. 501T 0[OCRerr]---4, 301T 30 40 50 e,O 70 80 90 IOO °Io PRECISION SEARCH [OCRerr]ULES A and B, 17 QUESTIONS, INDEX LANGUAGE 1.6.a (FIGURES 4.501T and 4.301T)