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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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