Boolean operators allow terms to be combined with logic operators. The following operators are allowed: AND, OR and NOT.
Note: Boolean operators must be ALL CAPS
The AND operator is the default conjunction operator. This means that if there is no Boolean operator between two terms, the AND operator is used. The AND operator matches records where both terms exist anywhere in the field of a record.
To search for records that contain "economics" and "Keynes" use the query:
economics Keynes
or
economics AND Keynes
The OR operator links two terms and finds a matching record if either of the terms exist in a record.
To search for documents that contain either "economics Keynes" or just "Keynes" use the query:
"economics Keynes" OR Keynes
The NOT operator excludes records that contain the term after NOT.
To search for documents that contain "economics" but not "Keynes" use the query:
economics NOT Keynes
Note: The NOT operator cannot be used with just one term. For example, the following search will return no results:
NOT economics