# Package org.apache.lucene.queryparser.ext

package org.apache.lucene.queryparser.ext
Extendable QueryParser provides a simple and flexible extension mechanism by overloading query field names.

- Class
  Description
  ExtendableQueryParser
  The `ExtendableQueryParser` enables arbitrary query parser extension based on a customizable field naming scheme.
  ExtensionQuery
  `ExtensionQuery` holds all query components extracted from the original query string like the query field and the extension query string.
  Extensions
  The `Extensions` class represents an extension mapping to associate `ParserExtension` instances with extension keys.
  Extensions.Pair<Cur,Cud>
  This class represents a generic pair.
  ParserExtension
  This class represents an extension base class to the Lucene standard `QueryParser`.