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High-idf query terms only

  • For a query such as catcher in the rye

  • Only accumulate scores from catcher and rye

  • Intuition: in and the contribute little to the scores and so don’t alter rank-ordering much

  • Benefit:

    • Postings of low-idf terms have many docs  these (many) docs get eliminated from set A of contenders

Speaker notes:

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