Boolean Search or Boolean Query

A form of logical comparison. Boolean operators let you define whether multiple search terms are matched within a text block. A Boolean expression is constructed by joining terms together with the three special operators: AND, OR, and NOT. You can also combine sub-expressions within a query using these boolean expressions. Proximity Search using the NEAR/ONEAR operators are somewhat related. NEAR is similar to AND, but implies an additional constraint that the terms should appear within a given distance in the document.