(a) Markup to the body, that has the purpose to
indicate that a part of
the body is referring to a user or a group of users
(b) Some indication that the message should have some sort of priority
to a user or a group of users
In the direct mention case, I don't think we really wrnt to allow one
without the other.
I am also against noping though. It is not up to the sender if I want to be
notified.
And if we use occupant id the idea of cross-room mentions becomes not
possible. I'm not sure what the use case for those is but if we wand that I
suppose we should use URI. At which point we are maybe back to a minor
update the references XEP rather than a nnw XEP for this, per jdev
discussion the other day. Just need a URI for occupant IDs which we could
define new or GC3 style (xmpp:muc/occupantid)