Required attribute;
read/write access; type:
o|[os] System Panel
Required interfaces: system_panel.
target
Optional attribute;
read/write access; type:
o|[os]|n Object to which state changes are propagated. The current state is sent to the target object via the signal interface whenever it is changed to a new value. This can either happen by input from another configuration object via the signal interface, or by user input from the system panel frontend.