SCXML: <invoke> etc.

Hi,

The specification of <invoke> and related elements is quite vague and 
ambiguous in the current draft. In my current implementation (at 
<http://www.ling.gu.se/~lager/Labs/SCXML-Lab/>), if an SCXML state 
machine invokes (e.g.) another SCXML state machine, the external queue 
of the latter is simply completely shared with the external queue of the 
former. This is probably not the way it should be done, and probably not 
what you have in mind. Right?

I saw that the last call working draft of SCXML is planned in September. 
Any chances you could leak something about your current thoughts on 
<invoke> etc.- if you have any - before then?

Regards,
Torbjörn