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