Advanced Lucene searches within this online help

This online help uses the Apache Lucene information retrieval library for its built-in search engine. Lucence features a powerful query syntax for best search results.

Search type

Syntax and characters

Explanation / example

Wildcard for a single character matches


"te?t" returns: text, test

Wildcard for matches of 0 or more characters


"tet* " returns: tests, testing

Boolean operators:


Must be present






Grouping, Boolean logic combined with brackets

(term operator term)

(test !text)