# Revision Stamp

## Properties

| Property | Type | Required | Description |
| --- | --- | --- | --- |
| `at` | string | **yes** | The timestamp recording exactly when this specific revision iteration occurred.<br/><br/>ISO 8601 date-time. |
| `seq` | integer | **yes** | Monotonically increasing sequencing value utilized for optimistic concurrency control locks.<br/><br/>Min: `0`. |