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