In one embodiment, {HEAD ~ the map instance} 134 is {TAIL ~ a runtime instantiation} of the map definition 132 
is
In one embodiment , { HEAD ~ the map instance } 134 is { TAIL ~ a runtime instantiation } of the map definition 132
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH