USING BOOLEAN OPERATORS IN ONLINE SEARCHING-- SELECTED RESOURCESKeeley Library, August 2, 2000
Boolean Searching can help us to perform better searches of online catalogs and databases.
choose the Complex or Advanced Search option, you will often
be presented with a form in which to type your search terms. You can change
the way in which information will be searched and results displayed by
changing the Boolean operators.
To change them, click on the arrow in the pop-up menu to the right of the word, AND.
|WHEN TO USE THE LOGICAL OPERATORS, AND, OR, NOT OR XOR IN ONLINE SEARCHING:|
SEARCH FOR: DOGS AND CATS
|Result list must include both
dogs and cats.
Resulting list of articles is smaller, but more precise and accurate, since both items must occur in the book, magazine article, etc.
Use this option when you want to limit results, especially when both terms are very general, or initial search yields too many hits.
Note: Some search engines use a + sign before the word instead of AND. Others enclose a phrase within quotes or within a parentheses to search words together.
SEARCH FOR: DOGS OR CATS
|Result list can include one,
or the other, or both.
Resulting list of articles or books will be larger, but less precise.
Use this option when you want to expand a search to find everything there is about both terms, or when initial search yields few results.
SEARCH FOR: DOGS NOT CATS
|A term is excluded from the
None of the books, or articles in the result list will have anything about cats.
Use this option to limit a search, when you want to screen out, or eliminate terms not relevant to your search.
Note: Some search engines use a - sign before the word instead of NOT
SEARCH FOR: DOGS XOR CATS
terms are included in the search, but are listed as separate results.
Example: You might
want to use this method if you are doing research that will be used for
several different projects. XOR will separate the result list for each
The Sails WebCat Online Library Catalog has a Complex Search Option. The Online Periodicals Databases also have Complex or Advanced Search options that allow you to do Boolean Searching using AND, OR, NOT
Links to Online Search Engines which
have an Advanced, or Complex Search option
with Boolean operators, AND, OR, NOT:
|Alta Vista Advanced Search Menu(Boolean Query)||Google Advance Search Menu|
|HotBot Advanced Search Menu||Intelliseek ProFusion Modified Boolean Menu|
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Jane Constant Keeley Library
B.M.C.Durfee High School of Fall River
September, 1978 to June, 2001