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.
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9O
8O
FIGURE 4.719P
2O
IO
O IO
FIGURE 4.720P
II
X 4. 704T
O 4. 705T
t 4. 706T
4. 708T
I
20 30 40 50 60 70
°/o PRECISION
80 90 IOO
SIMPLE CONCEPT INDEX LANGUAGES II.5.a.
II.6.a, II.7.a and II.9oa {FIGURES 4.704To
4.705T, 4.706T and 4.708T)
o\
\2 \[OCRerr]o
20 30 40 50 60
°/o PRECISION
X 4. ?07T
O 4. ?09T
I
70 80 90 I00
SIMPLE CONCEPT INDEX LANGUAGES ]I.8.a,
II.10,a (FIGURES 4.707T and 4,709T)