Efficient query expansion with auxiliary data structures

  title={Efficient query expansion with auxiliary data structures},
  author={Bodo Billerbeck and Justin Zobel},
  journal={Inf. Syst.},
Query expansion is a well-known method for improving average effectiveness in information retrieval. The most effective query expansion methods rely on retrieving documents which are used as a source of expansion terms. Retrieving those documents is costly. We examine the bottlenecks of a conventional approach and investigate alternative methods aimed at reducing query evaluation time. We propose a new method that draws candidate terms from brief document summaries that are held in memory for… CONTINUE READING