A method of combining concepts in keywords search which allows the searcher to use three logical commands (sometimes called "operators"). The OR command is used to expand or broaden search results by including synonyms and related terms. Search statement: violence or conflict or aggression The AND command is used to narrow search results. Each time another concept is added using "and" the search becomes more specific. In some online catalogs, and electronic databases, the "and" command is implicit -- there is no need to type it in a keywords search. Search statement: violence and television Or just: violence television The NOT command is used to exclude unwanted records from search results. Search statement: television not video When two different Boolean commands are used in the same search statement, parentheses must be included to indicate which command is to be performed first. See also nesting. Search statement: television and (violence or aggression) Or just: television (violence or aggression)

The use of the words "and", "or", and "not" to combine search terms so as to increase or decrease the amount found. When used in this way, these words are called Boolean or logical operators.

use of search terms (AND, OR, NOT and others) to control the number and quality of results found in a search.

A method of combining two or more search terms to increase or restrict the amount found.

In searching a database, operators such as AND, OR, and NOT that are sometimes used to combine search terms to broaden or narrow the results of a keyword search. Combining terms using operators is called Boolean searching.

named for mathematician George Boole, Boolean searching uses mathematical set logic to combine search terms. Boolean operators AND, OR, and NOT are used in Boolean search statements to specify the logical relations among terms. Boolean searching is explained in OWL 4.

Boolean searches allow you to combine words and phrases using the words (Boolean operators) AND, OR, NOT and NEAR to limit your search. Though most search tools use Boolean operators, they may express them in a variety of ways, through buttons, pull-down menus, or "+" and" --" signs. AND is especially helpful in more complicated searches to narrow the scope of your search by insisting that all the words are considered in the search. (music AND censorship) OR will help group synonyms or related words. (heart OR cardiac) NOT helps eliminate "problem" words. (eagles NOT football)

A method of combining concepts in a keyword search which allows the searcher to make use of logical commands (sometimes called "operators"). The "or" command is used to expand or broaden search results to include synonyms and related terms. Example: violence or conflict or aggression The "and" command is used to narrow search results. Each time another concept is added, the search becomes more specific since the two concepts must appear together. Example: violence and television. The "not" command is used to exclude unwanted records from search results. Example: television not video When two different Boolean commands are used in the same search statement, parentheses must be included to indicate which command is to be performed first. Example: television and (violence or aggression).

uses operators (AND, OR and NOT) in the search expression. Especially helpful in multifaceted or specific topics, Boolean operators help expand or narrow the scope of your search. A search for rivers OR lakes returns documents with either word in them. A search for rivers AND lakes returns documents with both words in them. A search for rivers AND lakes NOT swamps returns only documents that mention both rivers and lakes but omits those that also mention swamps.

a method of searching for information in computer databases by joining words or concepts with the Boolean operators "and", "or" or "not".

A precise method of searching online indexes and databases, the Library catalogue and the WWW using 'Boolean Operators' (the words 'and', 'or', 'not', 'with', 'near') to link search words and combine them in various ways to narrow or broaden a search as required.

A method of combining two or more search terms (such as and, or, not) to increase or restrict the search results.

The name for using Boolean Logic and Boolean Operators in a search. See also operators.

A form of searching available on databases such as library catalogues, electronic journal indexes and www search engines which makes use of Boolean algebra (a system of logic dealing with the relationship between sets). Keywords can be linked together by Boolean Operators (e.g. and, or, not) in order to refine a search. For instance: symphony and classical will retrieve all of the records on a database which contain both words. galant or pre-classical will retrieve all of the records on a database which contain either of the words.

Using the terms 'and', 'or' or 'not' to search for a specific combination of words in a database. These combining terms are sometimes represented by symbols, which vary from program to program.

A method of combining search terms by expressing the relationship of one concept to another generally using 'and', 'or', 'not'. (See lesson for full explanation)

Uses the terms AND, OR, & NOT to restrict a search to a combination of terms.

Using search techniques which utilize boolean operators and boolean logic.

Searching using Boolean Operators: The standard terms used to combine keywords and other search terms when searching electronic databases (or the World Wide Web). They are named after 19th century mathematician George Boole. OR is more; AND is less; NOT is a snob • OR broadens searches because it tells the database you want either one or both of the words/phrases • AND narrows searches because it stipulates that both terms/phrases must be included • NOT narrows and focuses searches because it excludes words/phrases (use cautiously)

Uses three basic Boolean operators (and, or, not) to link concepts in database searching; e.g., "pets NOT (dogs or cats)" will retrieve records on pets other than dogs or cats; can be used in KeyWORD searches in OSCAR and OhioLINK

The use of three basic Boolean operators or connectors (AND, OR, NOT) to link concepts in database searching.

A method of combining search terms by expressing the relationship of one concept to another generally using 'and', 'or', 'not'. The expression "Value 1 and Value 2" requires both values to be in the grouping retrieved; "Value 1 or Value 2" will retrieve either of the values; "Value 1 but not Value 2" will retrieve only Value 1 items with no mention of Value 2. For example, searching "gone and wind" would pick up the title Gone with the Wind as well as Margaret Mitchell of Atlanta, the Author of Gone with the Wind"; "gone or wind" would pick up the above titles plus Going, Going, Gone; Wind and Beyond; Wind in the Willows; The Parade's Gone By; and Watching the Wind. See Also Keyword Searching.

Use of the words ‘and’, ‘or’, and ‘not’ to combine search terms producing advanced search commands for use with CD-ROMS or online databases.

A technique for combining terms using and, or, and not and sometimes near (known as Boolean Operators). and requires all terms appear in a record. OR retrieves records with either term. and not excludes terms. near finds two terms which are close to each other but not necessarily next to each other and not in a particular order (known as proximity searching). Parentheses may be used to sequence operations and group words. (known as nesting) See also require/reject term, fuzzy and.

the process of linking topics in order to narrow or expand a search through the use of the boolean operators "AND", "OR", or "NOT". Use OR to broaden a concept by including more terms to describe it (college students OR university students). Use AND to narrow the search by linking the concepts together (stress AND the students). Use NOT to eliminate certain terms, if necessary.

A term for the process of narrowing or expanding an electronic search by using terms such as AND (retrieves items in which two or more terms are found) OR (retrieves items in which either term is found), NOT (retrieves items in which the first term is present but the second term is not).

Uses three basic Boolean operators (AND, OR, NOT) to link concepts in database searching. For more information, see the Search Strategy guide.

Boolean searching is a method of combining search terms in a database to limit results using Boolean (logical) operators: AND, OR and NOT: AND narrows a search, specifying that both search terms must be found in the record, though not necessarily in the same section. OR broadens a search. Either search term must be found somewhere in the record. NOT narrows a search. A record is retrieved only when the first term is present and not the second. Bound Refers to several issues of a periodical which are joined together under one cover.

Uses three basic Boolean operators (AND, OR, NOT) to link concepts in database searching. AND retrieves items in which both terms are found. OR retrieves items in which either term is found. NOT retrieves items in which the first term is present but the second term is not. E-F H-I K-L M-O T-Z

a method of searching on the Internet using keyword and linking them together with "and," "or," "not." Its name comes from the French word boullion, which means mixture

A search strategy for finding specific information on your topic. Using Boolean operators you may combine search terms to find results: Term 1 AND Term 2 Sample: "General Electric AND Jeffrey Immelt"• You will find results containing both search terms Term 1 OR Term 2 Sample: "Junior High School OR Middle School"• You will find results containing either search term Term 1 NOT Term 2 Sample: "Eating Disorders NOT bulimia"• You will find results about eating disorders, but not bulimia

a method of searching in electronic databases by combing words or concepts together. There are three Boolean operators - AND, OR, and NOT - that are used to broaden or narrow keyword searches. Click here to see a diagram explaining how to use AND, OR, and NOT in Boolean searching.

Methods of information retrieval where a query consists of a sequence of search terms, combined with operators, such as "and", "or", and "not".

A method of searching a database or website whereby you can either narrow down or expand your search depending on your use of Boolean operators - AND, OR, NOT with the terms you are searching for.

The facility to link separate concepts of a query using 'and', 'or' and 'not' operators when searching a computerised database.