BPMN12 — precisions about the Signal Event

I would appreciate some precisions about the Signal Event. Initially
we intended not to have any data associated with it. Yet it has some
properties. I think it makes sense; we indeed need to associate
technical information such as the Name or Id of the instance that
raised it, as well as its TimeStamp. I want to make sure those are
not supposed to be business data. Also I think this part is under
specified, we need to further explain what kind of mechanism should be
used to "listen" to such events, (publish/subscribe pattern ?) as well
as how long such messages are supposed to be kept alive. For instance
on Figure 10.48 (Adobe 322) what is supposed to happen if "B
Completed" is raised before the upper sub process is ready to receive it
?

Suggested Resolution:
Close, No Change: This issue is out of scope for the RTF and will be addressed by the response to
the BPMN 2.0 RFP.
Revised Text: None
Disposition: Closed, deferred