ON THE SPECIFICATION OF TERM VALUES IN AUTOMATIC INDEXING
G. Salton, Chul‐Su Yang · Journal of Documentation · 1973
The existing practice in automatic indexing is reviewed, and it is shown that the standard theories for the specification of term values (or weights) are not adequate. New techniques are introduced for the assignment of weights to index terms, based on the characteristics of individual document collections. The effectiveness of some of the proposed methods is evaluated.