recording segment attribute information for the selected file segment, the segment attribute information including source information and {HEAD ~ a file sharing protocol} for {TAIL ~ the selected file segment} 
recording segment attribute information for the selected file segment , the segment attribute information including source information and { HEAD ~ a file sharing protocol } for { TAIL ~ the selected file segment }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL