val get : t -> int -> stringget row i returns the ith column of the row. The first column has index 0. Since CSV allows a file to have rows of different lengths, this function never fails, it returns "" if the column does not exist.
val find : t -> string -> stringfind row header return the value of the colum labelled with header (or "" if no such header has been declared).
val to_list : t -> string listto_list row convert row to the usual representation, the list being in the column order.
val to_assoc : t -> (string * string) listto_assoc row return an associative list of the row data as (header, value). If no header is given for a column, "" is used.