The system applies the candidate transformation rules to {HEAD ~ the selected query element} to generate {TAIL ~ a transformed query element} that includes a transformed remote query element 
to generate
The system applies the candidate transformation rules to { HEAD ~ the selected query element } to generate { TAIL ~ a transformed query element } that includes a transformed remote query element
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH