ZWaveSceneDeviceExt (scenes) is a container slot on a ZWaveDevice, providing the Z-Wave device represented supports scenes. It has no configuration or status properties. If one or more scenes have been defined that include this device, it contains corresponding child “scene actuator configuration” (ZWaveSceneActuatorConf) components.

Although scenes have this “device-level” visibilty, they are typically engineered at the “network level”, using the Scenes network extension on the Z-WaveNetwork. For more details, see About Z-Wave Associations.