_index | The name of the index. |
_id | The document’s ID. |
_version | The document’s version number. Updated whenever the document changes. |
_seq_no | The sequnce number assigned when the document is indexed. |
primary_term | The primary term assigned when the document is indexed. |
found | Whether the document exists. |
_routing | The shard that the document is routed to. If the document is not routed to a particular shard, this field is omitted. |
_source | Contains the document’s data if found is true. If _source is set to false or stored_fields is set to true in the URL parameters, this field is omitted. |
_fields | Contains the document’s data that’s stored in the index. Only returned if both and found are true. |