In other words, {HEAD ~ the judgment} is made on {TAIL ~ the type} of the received document data in this step 
In other words , { HEAD ~ the judgment } is made on { TAIL ~ the type } of the received document data in this step
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH