accessing a data structure containing 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 {HEAD ~ the plurality} of {TAIL ~ vertical columns} in the table 
of
accessing a data structure containing 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 { HEAD ~ the plurality } of { TAIL ~ vertical columns } in the table
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