Boolean Searching

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Boolean Searching

  1. 1. Searching with Boolean Operators<br />Created by Terri Bogan, M.L.S.<br />For Hope International University<br />Fullerton, CA<br />
  2. 2. Searching with Boolean Operators<br />Make your search more precise using the connectors AND, OR, and NOT between your search terms.<br />Narrow your search using AND.<br />Broaden your search using OR.<br />Exclude words from your search using NOT.<br />
  3. 3. “AND”<br />Narrow your search and retrieve fewer items by using the Boolean operator “AND”.<br />Example:<br />crime AND statistics<br />The circle on the left represents items with the word “crime”.<br />The circle on the right represents items with the word “statistics”.<br />The shaded crossover section represents items that include both words crime AND statistics. The items retrieved must contain all words in the search.<br />crime<br />statistics<br />
  4. 4. “OR”<br />Broaden your search and retrieve more items using the Boolean operator “OR”.<br />Example:<br />robbery OR theft<br />The circle on the left represents items with the word “robbery”.<br />The circle on the right represents items with the word “theft”.<br />The entire shaded area, including the crossover section, represents items with either one or both words <br />robbery OR theft.<br />robbery<br />theft<br />
  5. 5. “NOT”<br />Use “NOT” to eliminate a word meaning (e.g. find items about dna testing, but not as it relates to crime).<br />Example:<br />dna testing NOT crime<br />The circle on the left represents items with the words “dna testing”.<br />The circle on the right represents items with the word “crime”.<br />The crossover section is excluded in a “NOT” search because that section includes items with the word “crime”. <br />crime<br />dna testing<br />
  6. 6. “AND”<br />Connect your search terms using the “AND” operator.<br />
  7. 7. “OR”<br />Connect your search terms using the “OR” operator (sometimes referred to as “AND OR”). <br />
  8. 8. “NOT”<br />Connect your search terms using the “NOT” operator (sometimes referred to as “AND NOT”).<br />

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