The method 2 wherein {HEAD ~ the interface description language} is {TAIL ~ the “Interface Definition Language}”  
is
The method 2 wherein { HEAD ~ the interface description language } is { TAIL ~ the “ Interface Definition Language } ”
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH