If an inexact transformation improves the query performance, the system prioritizes {HEAD ~ the candidate transformation rules} applicable to {TAIL ~ the selected query element} 
applicable to
If an inexact transformation improves the query performance , the system prioritizes { HEAD ~ the candidate transformation rules } applicable to { TAIL ~ the selected query element }
OTH OTH OTH OTH 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