This is our key disagreement, I think. As far as I'm concerned, this is NOT
"static" information: it *does* change. In general, it only changes once, but
it is this one change that makes or breaks a gas gauge. (It could even in
theory change multiple times, but this is definitely a corner case, I admit).
>All IPP notifications are unacknowledged and NOT retried.
>Any monitoring client practically speaking MUST do some
>level of polling of relevant data from the Printer or Job
>anyway. Static data should be acquired then.
As long as I was receiving notifications, I would not, as a monitoring
application, do any polling at all. I would only poll if I hadn't heard
anything for a while.