[[query-dsl-prefix-query]] === Prefix Query Matches documents that have fields containing terms with a specified prefix (*not analyzed*). The prefix query maps to Lucene `PrefixQuery`. The following matches documents where the user field contains a term that starts with `ki`: [source,js] -------------------------------------------------- { "prefix" : { "user" : "ki" } } -------------------------------------------------- A boost can also be associated with the query: [source,js] -------------------------------------------------- { "prefix" : { "user" : { "value" : "ki", "boost" : 2.0 } } } -------------------------------------------------- Or : [source,js] -------------------------------------------------- { "prefix" : { "user" : { "prefix" : "ki", "boost" : 2.0 } } } -------------------------------------------------- This multi term query allows to control how it gets rewritten using the <<query-dsl-multi-term-rewrite,rewrite>> parameter.