[M4IF Technotes] Interactive within interactive

[Nik]

Hi there, 
I understand the concept of abstracting out audio video objects, which
can then be composed as you like, but could one of these objects in turn
be *another* mpeg-4 file with its own interactivity etc.?
So if we had a complex mpeg-4 file exhibiting interactivity (still not
sure-is this likely to be advanced simple profile?), could we then
interact with a similar file (same profile) embedded somewhere within
it?
Thanks for your help!
Nik.