A priority vector for the combination of requesters has {HEAD ~ a sequential list} of {TAIL ~ requester identifiers} 
of
A priority vector for the combination of requesters has { HEAD ~ a sequential list } of { TAIL ~ requester identifiers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL