Combining search terms
When you are searching in a catalogue, database or on the Internet for a specific subject, you will usually have to enter several search terms in order to define the subject as clearly as possible. You can combine these search terms and, in doing so, establish specific relationships between them. This is normally done using Boolean or logical operators such as AND, OR and NOT, as is customary in most search engines.
Other refinement techniques of a search profile and the later search process are truncating and masking, the use of relational and positional operators and the possibility of searching specific fields in databases.