Feature engineering on event-centric surrogate documents to improve search results

  • Authors:
  • Wenhui Liao;Isabelle Moulinier

  • Affiliations:
  • Thomson Reuters, Eagan, MN, USA;Thomson Reuters, Eagan, MN, USA

  • Venue:
  • Proceedings of the 18th ACM conference on Information and knowledge management
  • Year:
  • 2009

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Abstract

We investigate the task of re-ranking search results based on query log information. Prior work has considered this problem as either the task of learning document rankings of using features based on user behavior, or as the task of enhancing documents and queries using log data. Our contribution combines both. We distill log information into event-centric surrogate documents (ESDs), and extract features from these ESDs to be used in a learned ranking function. Our experiments on a legal corpus demonstrate that features engineered on surrogate documents lead to improved rankings, in particular when the original ranking is of poor quality.