Only In Lesson One, the database structure of GIL contains records with searchable fields that allow retrieval of the most specific, relevant records. For example, entering a search term like surgery would retrieve too many records so a better strategy to pursue might be to combine one or more additional search terms to surgery to obtain a more precise search. These concepts of AND, OR, and NOT are also referred to as Boolean operators.
More Options interface default is AND-oriented.
Fast or Basic interface default is OR-oriented. In Fast or Basic interface, Boolean operators may only be applied in keyword-based search fields. You may also nest Boolean phrases with parentheses. Applying Boolean Operators in the More Options Interface Enter search terms and select the search fields and the Boolean operator desired. Do not type in special punctuation or Boolean operators when using More Options interface.