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Woksape Tipi - Academic/Public Library and Archives   Tags: american indian, databases, native american, oglala lakota  

Last Updated: Mar 28, 2017 URL: http://library.olc.edu/content.php?pid=576348 Print Guide RSS UpdatesEmail Alerts

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BOOLEAN (and, or, not) & MATH SYMBOLS

BOOLEAN Searches with Diagrams

The power of Boolean searching is based on combinations of keywords with connecting terms called operators.

The three basic operators are the terms

AND, OR, and NOT

 

AND

   The operator AND narrows a search by combining terms and retrieves every document that contains both of the words specified. When the computer searches its database and retrieves every record containing both of the words Internet and security, only the records WITH BOTH WORDS will be retrieved.

Internet AND security

 AND narrows a search by combining terms

 

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OR

The OR operator broadens or widens a search to include documents containing either keyword. The OR search is particularly useful when there are several common synonyms for a concept or variant spellings of a word.

weightlifting OR bodybuilding

 OR searches often produce large numbers of documents  

the computer searches for all documents containing these terms

 *************************

NOT

Combining search terms with the NOT operator narrows a search by excluding unwanted terms.

gambling NOT lottery

 

Boolean search terms may be combined in various ways to refine searches.

oceans OR lakes AND pollution

nurses AND malpractice NOT doctors

children NOT infants AND psychology

 

This guide was created by Denise English, Director of Library Services. http://www.lscc.fl.us/library/guides/boolsea.htm

 

MATH  & “ ” Searches

 You may use + or as well as “ ”  marks to search for an exact word or phrase.   example:

 Oglala + Horse will make your search more specific. Oglala – Rosebud will decrease some of the general sources that might include both tribes.

 Quotation marks will look for the exact title or phrase you are request:

 “tribal college library” will produce 1,310 hits on Google whereas

 tribal college library entered without the quotation marks brought up more than 176,000 hits on Google.

 Check out the InfoPeople SEARCH TOOLS CHART for more tips on Boolean, + or -, and “”, AVAILABLE IN YOUR LIBRARY HANDBOOK.

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