char_var. GENERIC= specifies that multiple variables can use
the same column definition. BLANK_DUPS= suppresses the display of the value
in the column if it does not change from one row to the next (and, because
CLASSLEVELS=ON for the table, if no value changes in a preceding column that
is marked with BLANK_DUPS=ON changes).
The END statement ends the definition.
define column char_var;
generic=on;
blank_dups=on;
end;