id	description	section	req	max_loop	max_usage	pos
SMB	Beginning Segment For Railroad Station Master File	H	M	0	1	1
N4	Geographic Location	H	M	0	10	2
CD	Shipment Conditions	H	O	0	10	3
SMS	Station Codes Segment	H	M	0	1	4
SMA	Station Address	H	O	0	10	5
N1	Party Identification	H	O	0	1	6
SMR	Cross Reference	H	O	0	10	7
SMO	Operational Services	H	O	0	10	8