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Each document has metadata associated with it, such as the
_id metadata fields. The behavior of some of these metadata
fields can be customized when a mapping is created.
Identity metadata fieldsedit
Document source metadata fieldsedit
Doc count metadata fieldedit
- A custom field used for storing doc counts when a document represents pre-aggregated data.
Indexing metadata fieldsedit
Routing metadata fieldedit
- A custom routing value which routes a document to a particular shard.