Object field types
Object field types contain values that are objects or relations. The following table lists all object field types that OpenSearch supports.
| Field data type | Description |
|---|---|
object | A JSON object. |
nested | Used when objects in an array need to be indexed independently as separate documents. |
flat_object | A JSON object treated as a string. |
join | Establishes a parent-child relationship between documents in the same index. |