Header file 900 is {TAIL ~ an example} of {HEAD ~ an implementation} of header file 304 in FIG 3 
Header file 900 is { TAIL ~ an example } of { HEAD ~ an implementation } of header file 304 in FIG 3
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH