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Boolean queries: Exact match

  • The Boolean retrieval model is being able to ask a query that is a Boolean expression:
    • Boolean Queries use AND, OR and NOT to join query terms

      • Views each document as a set of words

      • Is precise: document matches condition or not.

    • Perhaps the simplest model to build an IR system on

  • Primary commercial retrieval tool for 3 decades.

  • Many search systems you still use are Boolean:

    • Email, library catalog, Mac OS X Spotlight

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