IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« join datatype _all field »

› ›

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. Disabled by default.
_field_names: All fields in the document which contain non-null values.

Routing meta-field

edit

_routing: A custom routing value which routes a document to a particular shard.

Other meta-field

edit

_meta: Application specific metadata.

« join datatype _all field »