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COMMISSION VI DOCUMENTATION OF LITERATURE 
  
  
NY 
knowledge that may be of interest to us -- and arranged 
in any combination that may be desired. As a result; each 
of our various specialists may find his special subject 
appropriately classified and sub-divided regardless of his 
own point. of view or field of interest.) 
d. General acceptance. (The value of the system depends in 
part upon the amount of cooperation that can be obtained 
in establishing and maintaining it. In order to make the 
system as useful as possible it should therefore be wide- 
ly accepted in as many different fields as possible.) 
e. Flexibility. (The system should provide a detailed clas- 
sification for those subjects for which we have accumulat- 
ed a great deal of useful written materials on the other 
hand, this same classification system should provide a 
broad but sufficiently adequate classification for other 
material on hand concerning subjects of small interest. 
In addition, it should be possible to expand any part of 
the classification system at a resonable expenditure of 
time and money without destroying its simplicity, orderiy 
arrangement, or universal application.) 
The following types of indexing and classi S 
tems have been carefully considered prior to the preparation 
of this papers 
a. Library of Congress system 
b. NRS system 
c. CADO system 
d. Dewey and Universal decimal classifications 
e, Professor Schermerhorn's system 
As a result of this investigation it appears evident that a 
decimal classification system similar to the Dewey and UDC is 
to be preferred above all other systems in classifying docu: 
o 
11 
ment catalogue cards. These decimal systems are easy to us 
and provide for an orderly arrangement of all document cata 
logue cards. They have wide-spread acceptance and have been 
used for a great many years. In spite of these advantages, 
this author must acknowledge the limitations of the decimal 
systems. For example, in order to be üniversal in scope, they 
must provide space for subjects which are of no interest to 
photogrammetrists, Also, they follow Professor Dewey's classi- 
À 
a) 
i