id	description	section	req	max_loop	max_usage	pos
BGN	Beginning Segment	H	M	0	1	1
DTM	Date/Time Reference	H	M	0	10	2
SMS	Station Codes Segment	H	M	0	1	3
N1	Party Identification	H	M	2	1	4
PI	Price Authority Identification	H	O	0	1	5
CD	Shipment Conditions	H	O	0	50	6