Complex boolean search tools7/27/2023 ![]() Parentheses allow you to group together keywords and control the order in which the terms will be searched, just like in a mathematical statement. Example: Using NOTcentrifugal NOT centripetal Parentheses: () Use this when you want results that contain one specific keyword but not another. Make sure to put your keywords in the correct order when using NOT, as the search results provided will exclude the latter keyword. NOT will provide search results containing the first of your keywords but not the second. Example: Using ORhorticultural OR agricultural NOT Use this when you want results that contain at least one (though not necessarily both) of your chosen keywords. OR will provide search results containing at least one of your keywords. Example: Using ANDAnthropocene AND climate change AND ecosystem OR Use this when you want results that contain two or more specific keywords. This will return results containing words such as “development,” “developer,” and “developing.”ĪND will provide search results containing both or all of your keywords. Provides results that contain a variation of the keyword Provides results that contain the first keyword but not the secondĪllows you to group together keywords and control the order in which the terms will be searched Provides results that contain either keyword Provides results that contain both or all keywords Useful Boolean operators Boolean operator It’s also very helpful when you’re working on a literature review or systematic review. Knowing how to use Boolean operators effectively can save you a lot of time and help you to find useful sources, determine the relevance of your research topic, and create strong research questions. Frequently asked questions about Boolean operators. ![]() By using quotation marks, your results will return only items that include those exact terms in that exact order. ![]() Quotation Marks are used if you are searching for an exact phrase.Parentheses forms compound searches by giving you the ability to group similar or related terms together.For example, if you're researching Apple computers, you might search for "apple NOT fruit", so that your results won't include items about apples as food. Using NOT lets you be more precise by excluding certain terms. NOT narrows a search by finding records that contain one term but not another.Using OR makes your search wider by searching for similar or related terms. OR broadens a search by finding records that contain either or all of the terms you have entered.Using AND lets you be more precise by adding additional required concepts. AND narrows a search by finding records that must contain all the terms you have entered.Parentheses also allow you to group terms together. Boolean operators (AND, OR, NOT) allow you to form compound searches by combining two or more terms together. The third step is to establish relationships between the concepts/keywords which best express your topic. University Library Learning Commons, College of Engineering.Leslie and Irene Dubé Health Sciences Library.Distance and Distributed Library Services.Access and Equity Services in the Library.Help me find (books, articles, theses.).University Archives and Special Collections.
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