The type or types of {HEAD ~ event data} analyzed by the matching service 62 may vary widely depending upon the nature and {TAIL ~ purpose} of the particular system 30 
The type or types of { HEAD ~ event data } analyzed by the matching service 62 may vary widely depending upon the nature and { TAIL ~ purpose } of the particular system 30
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH