USER MANUALS

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.

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