{HEAD ~ The processing system} 1 then operates to extract content from {TAIL ~ the data file}, storing the content in the database 2 
{ HEAD ~ The processing system } 1 then operates to extract content from { TAIL ~ the data file } , storing the content in the database 2
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH