accessing {HEAD ~ a data structure} containing {TAIL ~ the information} for each of the columns in the table and generating icons representative of the information, wherein at least one of the icons represents a primary key having values uniquely identifying a single horizontal row of the plurality of vertical columns in the table 
containing
accessing { HEAD ~ a data structure } containing { TAIL ~ the information } for each of the columns in the table and generating icons representative of the information , wherein at least one of the icons represents a primary key having values uniquely identifying a single horizontal row of the plurality of vertical columns in the table
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH