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Spell correction

  • Two principal uses

    • Correcting document(s) being indexed

    • Correcting user queries to retrieve “right” answers

  • Two main flavors:

    • Isolated word

      • Check each word on its own for misspelling

      • Will not catch typos resulting in correctly spelled words

      • e.g., from →form

    • Context-sensitive

      • Look at surrounding words,

      • e.g., I flew form Heathrow to Narita.

Speaker notes:

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