elasticsearch-js/docs/reference/api/BulkOperationBase.md

BulkOperationBase [interface-BulkOperationBase]

Name	Type	Description
_id	Id	The document ID.
_index	IndexName	The name of the index or index alias to perform the action on.
if_primary_term	long
if_seq_no	SequenceNumber
routing	Routing	A custom value used to route operations to a specific shard.
version_type	VersionType
version	VersionNumber