![]() Then click on the “Term frequency” button to the right. For example, if you want cases and other sources that talk about “promissory estoppel,” you could enter this phrase into the third field. Which field should you use? The one that makes the most sense given your desired search terms. ![]() Once the Advanced search screen pops up, you can enter specific terms or phrases into any of the top three fields, which include, “Find documents that have:” Simply click on the “Advanced” search option under the search field. How do I use the ATLEAST function in Westlaw Edge? The general idea is that the more times a source mentions a specific topic, the more likely it will focus on that topic. The ATLEAST function requires Westlaw Edge to only display results in which the sources mention a particular term or phrase “at least” x number of times. While you can always run a regular search in Westlaw Edge - and use all of the cutting-edge search options that come with that option - there is another route you can try. Every item about dengue would be returned, as would those that discuss both of the other two.Let’s say you are looking for something in Westlaw Edge that discusses a specific legal principal in great detail - and doesn’t merely mention the principal once in passing. Since dengue fever has been a concern for over 250 years, this search would yield different results. dengue OR ( malaria AND zika) = every article about dengue, or those that discuss both zika and malaria.As the zika virus has only recently been a serious issue, this would limit the number of results. Every item returned would mention zika, and either dengue or malaria. ( dengue OR malaria) AND zika = articles about dengue or malaria, that also discuss zika.For example:ĭengue OR malaria AND zika can be interpreted as To make sure you get the search you want, use parentheses - every database follows those rules. Different databases have different rules about combining searches. Think of your search in concepts, then put those concepts inside parentheses. Searching on "dengue fever" will return only items with that exact phrase. If you're searching for a phrase rather than just a single word, you can group the words together with quotation marks. Note: sometimes AND NOT is used serves the same function as NOT. Searching on malaria NOT zika returns items that are about malaria, but will specifically NOT return items that contain the word zika. NOT eliminates items that contain the specified term.Searching on dengue OR malaria OR zika returns all items that contain any of the three search terms. OR searches find one term or the other.For example, searching on dengue AND malaria AND zika returns only results that contain all three search terms. AND searches find all of the search terms.There are three basic Boolean search commands: AND, OR and NOT. The computer will now give us articles that have one term from within each set of parentheses.ĪND (diabetes OR hyperglycemia OR hypoglycemia) AND, OR, NOT To use Boolean logic, put the terms/synonyms within a set of parentheses and combine them with OR. That's why it's important to have as many search terms as possible. With these databases, however, you will get exactly what you asked for. They won't give us information about used SUVs because we didn't ask for it. Why use Boolean logic? These databases are not intuitive like Google is. For example, if you search for used cars for sale in Google, you will get links to used Toyotas for sale or u sed SUVs for sale. Using the correct Boolean operator can make all the difference in a successful search. Boolean logic is a building block of many computer applications and is an important concept in database searching.
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