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Boolean operator

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Boolean operator

One of the Boolean logic operators such as AND, OR and NOT.
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Remaining on the Mapping Display page, I chose to combine my selections by selecting the Boolean operator "OR" from the dropdown list at the top right of the page, so that my search would result in articles addressing any or all of the subject headings.
Clinical question: does the literature indicate that patients with a ... by Fetters, Linda / Physical Therapy
These symbols and words are called Boolean operators because they determine what operation is performed on your key words in a Boolean search.
Finding what you need: using internet search engines by Hall, Marc Elliot / Leadership
For example, searching on the injection molding of nitrile rubber using natural language, Boolean operators and classifications as follows gives a wide variation in the number of records retrieved:
Finding information on rubber using the Rapra Abstracts database by Rubber World
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