# `AggregationsMultiTermsBucketKeys` [interface-AggregationsMultiTermsBucketKeys]

| Name | Type | Description |
| - | - | - |
| `doc_count_error_upper_bound` | [long](./long.md) |   |
| `key_as_string` | string |   |
| `key` | [FieldValue](./FieldValue.md)[] |   |