IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
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
The index to which the document belongs. |
|
The document’s mapping type. |
|
The document’s ID. |
Document source meta-fields
-
_source
- The original JSON representing the body of the document.
-
_size
-
The size of the
_source
field in bytes, provided by themapper-size
plugin.
Indexing meta-fields
-
_field_names
- All fields in the document which contain non-null values.
-
_ignored
-
All fields in the document that have been ignored at index time because of
ignore_malformed
.
Routing meta-field
-
_routing
- A custom routing value which routes a document to a particular shard.
Other meta-field
-
_meta
- Application specific metadata.