The method 11, wherein the one of {HEAD ~ a plurality} of {TAIL ~ line styles} corresponds with the shape of the first symbol 
of
The method 11 , wherein the one of { HEAD ~ a plurality } of { TAIL ~ line styles } corresponds with the shape of the first symbol
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH