Preferably, {HEAD ~ all requester identifiers} for {TAIL ~ a single requester} are not provided in a contiguous clump within a given priority vector 
for
Preferably , { HEAD ~ all requester identifiers } for { TAIL ~ a single requester } are not provided in a contiguous clump within a given priority vector
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