In this case, the file includes content instances, each content instance being associated with a respective field, and {HEAD ~ each field} having {TAIL ~ a respective type} 
having
In this case , the file includes content instances , each content instance being associated with a respective field , and { HEAD ~ each field } having { TAIL ~ a respective type }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL