Such a model may include an algorithm, program or related computation that can be performed, run or otherwise conducted in {HEAD ~ order} to produce {TAIL ~ the resulting data representation} 
to produce
Such a model may include an algorithm , program or related computation that can be performed , run or otherwise conducted in { HEAD ~ order } to produce { TAIL ~ the resulting data representation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL