A variable cell/s in known location/s on {HEAD ~ the border} can also have {TAIL ~ information} about the symbol such as number of cells on each axis, where to locate the descriptor block, an encryption code and the like 
have
A variable cell / s in known location / s on { HEAD ~ the border } can also have { TAIL ~ information } about the symbol such as number of cells on each axis , where to locate the descriptor block , an encryption code and the like
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH