This is a dump of the standard variables and command names used in NUT. Don’t use a name with any of the dstate functions unless it exists here.
If you need a new variable or command name, contact the Development Team first.
Put another way: if you make up a name that’s not in this list and it gets into the tree, and then we come up with a better name later, clients that use the undocumented variable will break when it is changed.
"opaque" means programs should not attempt to parse the value for that variable as it may vary greatly from one UPS to the next. These strings are best handled directly by the user.