Each element is represented by an index number that identifies the element, {HEAD ~ a length number} that indicates {TAIL ~ the length} of the elements name, and token numbers that represent tags delimiting the element 
Each element is represented by an index number that identifies the element , { HEAD ~ a length number } that indicates { TAIL ~ the length } of the elements name , and token numbers that represent tags delimiting the element
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH