IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
An Analysis of the Documentation Requests
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.
x-i8
50
Frequency `00-
Aver[OCRerr]e ISO
Concept 200
Frequency 250
300
Over All
350
Concepts
400
Per
450
Request
500
Generality 2-
Number of 4
Relevant 6
8
Documents
I0
12
33
Length-
Number of
Stem
Concepts
18
16
14
12
I0
8
6
4
2
a I''
I I I I I I I [OCRerr] I I I I I I I I I I I I [OCRerr]
Request A A A A B A A A B A A A A A 9 A 9 A All A 99 9 A B[OCRerr] 99 A B B B
7 I 2514151718649 9121651315911 I 17109106 337911142412
Nui~bers
U
B
Ii
Data for the 35 Individual Requests Showing Visually the
Correspondence Between Length, Generality and Average Concept Frequency.
Fige 8.