Field help (BSITABTYP) 

Select an option to indicate the type of segment.

Header: Header data is stored once per statement

Line: Line data is stored per each transaction in the bank statement.

Line detail: Line detail information is stored per subdetail (D level) of a CAMT.053/54 bank statement entry (transaction). In general, line detail information does not apply to MT940 statements or AR Lockbox CSV format.