SubDevice Required PIDs
What PID if any, is required to be supported by an SubDevice. The spec says that Supported Parameters is only required if the root has supported parameters. I would interpret the spec to mean "Required" for the root and all sub-devices. How can the controller determine which SubDevices are valid since they do not have to be consecutively numbered between 1 and Sub-device_Count? To me the would Required means each device not just the root.
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