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# NotificationTrigger

A trigger that fires when an app posts a notification.

## Discussion

This class enables an asset to fire a trigger as indicated by an app. The app defines the criteria for when the runtime executes the trigger’s action.

### Declaration

```other
class Preliminary_Trigger "NotificationTrigger"
```

## Topics

### Properties

[info:id](/documentation/USD/info-id)

The action’s unique identifier.

[identifier](/documentation/USD/identifier)

A string value that identifies the app-specific notification.


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