If {HEAD ~ the statement data dependencies} are on {TAIL ~ the identification list}, the statement will be treated as non shareable until the completion of the current unit of work 
are on
If { HEAD ~ the statement data dependencies } are on { TAIL ~ the identification list } , the statement will be treated as non shareable until the completion of the current unit of work
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH