According to one embodiment of the invention, {HEAD ~ the comparator} 515 includes {TAIL ~ the application} of heuristics 530 to the comparison 
According to one embodiment of the invention , { HEAD ~ the comparator } 515 includes { TAIL ~ the application } of heuristics 530 to the comparison
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH