elasticsearch/docs/reference/mapping/fields/id-field.asciidoc

[[mapping-id-field]]
=== `_id`

Each document indexed is associated with an id and a type. The `_id`
field allows accessing only the id of a document.

Note, even though the `_id` is not indexed, all the APIs still work
(since they work with the `_uid` field), as well as fetching by ids
using `term`, `terms` or `prefix` queries/filters (including the
specific `ids` query/filter).
Migrated documentation into the main repo 2013-08-29 07:24:34 +08:00			`[[mapping-id-field]]`
			=== `_id`

			Each document indexed is associated with an id and a type. The `_id`
Docs: Cleanup meta field docs Meta fields were locked down to not allow exotic options to the underlying field types in #8143. This change fixes the docs to no longer refer to the old settings. closes #10879 2015-05-01 06:01:35 +08:00			`field allows accessing only the id of a document.`
Migrated documentation into the main repo 2013-08-29 07:24:34 +08:00
			Note, even though the `_id` is not indexed, all the APIs still work
			(since they work with the `_uid` field), as well as fetching by ids
			using `term`, `terms` or `prefix` queries/filters (including the
			specific `ids` query/filter).