Grouping¶
Lucene supports using parentheses to group clauses to form subqueries. This can be very useful, if you want to control the Boolean logic for a query.
To search for either “jakarta” or “apache”, and “Web” use the query:
(jakarta OR apache) AND Web
This eliminates any confusion and makes you sure that “Web” must exist and either term “jakarta” or “apache” may exist.