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Meta-Fields
editMeta-Fields
editEach 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
The index to which the document belongs. |
|
A composite field consisting of the |
|
The document’s mapping type. |
|
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 themapper-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
editOther meta-field
edit-
_meta
- Application specific metadata.