IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Metadata fields
editMetadata fields
editEach document has metadata associated with it, such as the _index
and _id
metadata fields. The behavior of some of these metadata
fields can be customized when a mapping is created.
Identity metadata fields
editDocument source metadata fields
edit-
_source
- The original JSON representing the body of the document.
-
_size
-
The size of the
_source
field in bytes, provided by themapper-size
plugin.
Doc count metadata field
edit-
_doc_count
- A custom field used for storing doc counts when a document represents pre-aggregated data.
Indexing metadata fields
edit-
_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 metadata field
edit-
_routing
- A custom routing value which routes a document to a particular shard.