ON TERM SELECTION FOR QUERY EXPANSION
S.E. ROBERTSON
(Centre for Interactive Systems Research Department of Information Science, City University, London EC1V 0HB)
627
Abstract
In the framework of a relevance feedback system, term values or term weights may be used to (a) select new terms for inclusion in a query, and/or (b) weight the terms for retrieval purposes once selected. It has sometimes been assumed that the same weighting formula should be used for both purposes. This paper sketches a quantitative argument which suggests that the two purposes require different weighting formulae.
Citation
ROBERTSON, S.E. (1990), "ON TERM SELECTION FOR QUERY EXPANSION", Journal of Documentation, Vol. 46 No. 4, pp. 359-364. https://doi.org/10.1108/eb026866
Publisher
:MCB UP Ltd
Copyright © 1990, MCB UP Limited