id	description	section	req	max_loop	max_usage	pos
BGN	Beginning Segment	H	M	0	1	1
N1	Party Identification	H	M	0	3	2
DTM	Date/Time Reference	H	M	0	1	3
ENT	Entity	D	M	999999	1	4
LIN	Item Identification	D	M	999999	1	5
G28	Line Item Numbers	D	O	999999	1	6
G69	Line Item Detail - Description	D	O	0	1	7