CONTAINS Operators
A CONTAINS query expression can contain query operators that enable logical, proximity, thesaural, fuzzy, and wildcard searching. Querying with stored expressions is also possible. Within the query expression, you can use grouping characters to alter operator precedence. This book refers to these operators as the CONTEXT grammar.
With CONTAINS, you can also use the ABOUT query to query document themes.
See Also: “The CONTEXT Grammar”