# NotificationSorting Provides sorting information of active notifications. > **NOTE** > > The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version. **System capability**: SystemCapability.Notification.Notification **System API**: This is a system API and cannot be called by third-party applications. | Name | Type | Read-only| Mandatory| Description | | -------------------- | --------------------- | ---- | --- | ------------------------------------------ | | slot | [NotificationSlot](js-apis-inner-notification-notificationSlot.md) | Yes | Yes | Notification slot type. | | level | number | Yes | Yes | Notification level. If this parameter is not set, the default value is used based on the notification slot type.| | desc | string | Yes | Yes | Description of the notification slot. |