The multimedia content may be layered using multiple different layering approaches simultaneously, and {HEAD ~ access} to the different types of {TAIL ~ layers} may be offered simultaneously 
The multimedia content may be layered using multiple different layering approaches simultaneously , and { HEAD ~ access } to the different types of { TAIL ~ layers } may be offered simultaneously
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH