# `AggregationsSingleMetricAggregateBase` [interface-AggregationsSingleMetricAggregateBase]

| Name | Type | Description |
| - | - | - |
| `value_as_string` | string |   |
| `value` | [double](./double.md) | null | The metric value. A missing value generally means that there was no data to aggregate, unless specified otherwise. |