An issue with nomenclature that I recommend fixing. This document uses
the term "importance" with a completely different meaning from the
"importance" header in the Header Registry. Indeed, in this document,
the term "importance" has the same meaning as the "priority" header in
the mail headers registry and the "urgency" header in the XMPP registry.
I would prefer this used consistent terminology. I recommend ":urgency"
or ":priority" instead of ":importance". I understand the change would
be annoying this late in the process given the notify XMPP document has
to be updated as well, which is why I'm not making this a discuss issue.
But please consider this seriously.