The task enqueue operation includes adding the received task to {HEAD ~ an associated queue} of {TAIL ~ the scheduling hierarchy}, where the queue is associated with a data flow of the received task 
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The task enqueue operation includes adding the received task to { HEAD ~ an associated queue } of { TAIL ~ the scheduling hierarchy } , where the queue is associated with a data flow of the received task
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH