Terms
Lucene defines a query as comprising terms and operators.
Terms are classified into two categories, single terms
and phrases. A single term is a single word such as spell or error.
A phrase is a group of two or more words delimited by double
quotation marks, such as business report
By default, Lucene is case insensitive when it searches on terms.
This means that a search on the terms business, Business,
and BUSINESS will all generate the same result set.