# `AggregationsMetricAggregationBase` [interface-AggregationsMetricAggregationBase]

| Name | Type | Description |
| - | - | - |
| `field` | [Field](./Field.md) | The field on which to run the aggregation. |
| `missing` | [AggregationsMissing](./AggregationsMissing.md) | The value to apply to documents that do not have a value. By default, documents without a value are ignored. |
| `script` | [Script](./Script.md) | [ScriptSource](./ScriptSource.md) |   |