{HEAD ~ The data} encoded by each tag includes an identity of the product item, an identity of the interface surface and {TAIL ~ the position} of the respective tag on the interface surface 
includes
{ HEAD ~ The data } encoded by each tag includes an identity of the product item , an identity of the interface surface and { TAIL ~ the position } of the respective tag on the interface surface
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH