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Query term proximity

  • Free text queries: just a set of terms typed into the query box – common on the web

  • Users prefer docs in which query terms occur within close proximity of each other

  • Let w be the smallest window in a doc containing all query terms, e.g.,

  • For the query strained mercy the smallest window in the doc The quality of mercy is not strained is 4 (words)

  • Would like scoring function to take this into account – how?

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