[[mapping-fields]] == Fields Each mapping has a number of fields associated with it which can be used to control how the document metadata (eg <>) is indexed. include::fields/uid-field.asciidoc[] include::fields/id-field.asciidoc[] include::fields/type-field.asciidoc[] include::fields/source-field.asciidoc[] include::fields/all-field.asciidoc[] include::fields/analyzer-field.asciidoc[] include::fields/boost-field.asciidoc[] include::fields/parent-field.asciidoc[] include::fields/field-names-field.asciidoc[] include::fields/routing-field.asciidoc[] include::fields/index-field.asciidoc[] include::fields/size-field.asciidoc[] include::fields/timestamp-field.asciidoc[] include::fields/ttl-field.asciidoc[]