Somebody claiming to be Snit Guckfung via Standards wrote:
A message sent
by the room directly to the used, probably and
"headline". With a link to the room and message ID. I don't know
about XEP-0224, I've not implemented it so far and Philipp Hörist
explicitly asked to not use it in a previous message in this thread.
XEP-0372 could do the job, but it was discussed yesterday at the
council meeting that maybe your specification and XEP-0372 could be
merged somehow?
I'm on the fence regarding XEP-0224 as well. It was suggested by someone
else in the thread for notifications, but then it was also argued
against. Its also been brought up to be used for room mentions, which
is an entirely different use-case. Sounds like no one knows what
XEP-0224 is supposed to be in the context of MUCs, which is worrying...
XEP-0224 is pretty clear that the purpose is to send a message which cases
more of an attention-grabbing alert than the same message would otherwise
have received, and that how to get the user's attention is up to the
implementation. So if a client gets a message with this tag it should alert
the user in some way. In a MUC usually a message does not notify the user at
all, so any notification at all would be more than usual. That is why it is
appropriate for "room mentions", since those don't mention anything but
rather indicate that a messge should alert users.