         classes may also be specified for any individual column. If
                the number of elements in this list is less than the number of
                actual column children of the UIData, no "class"
                attribute is output for each column greater than the number of
                elements in the list. If the number of elements in the list
                is greater than the number of actual column children of the
                UIData, the elements at the posisiton in the list
  