{HEAD ~ Users} are given specific subsets of the database information to view at a given time, such as column definitions or {TAIL ~ the primary key definition} 
{ HEAD ~ Users } are given specific subsets of the database information to view at a given time , such as column definitions or { TAIL ~ the primary key definition }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL