WARNING: Version 2.2 of Elasticsearch has passed its EOL date.

This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.

› ›

Meta-Fields

edit

Meta-Fields

edit

Each document has metadata associated with it, such as the _index, mapping _type, and _id meta-fields. The behaviour of some of these meta-fields can be customised when a mapping type is created.

Identity meta-fields

edit

`_index`	The index to which the document belongs.
`_uid`	A composite field consisting of the `_type` and the `_id`.
`_type`	The document’s mapping type.
`_id`	The document’s ID.

Document source meta-fields

edit

_source: The original JSON representing the body of the document.
_size: The size of the _source field in bytes, provided by the mapper-size plugin.

Indexing meta-fields

edit

_all: A catch-all field that indexes the values of all other fields.
_field_names: All fields in the document which contain non-null values.
_timestamp: A timestamp associated with the document, either specified manually or auto-generated.
_ttl: How long a document should live before it is automatically deleted.

Routing meta-fields

edit

_parent: Used to create a parent-child relationship between two mapping types.
_routing: A custom routing value which routes a document to a particular shard.

Other meta-field

edit

_meta: Application specific metadata.

« Token count datatype _all field »