id description section req max_loop max_usage pos BSS Beginning Segment For Shipping Schedule/Production Sequence H M 0 1 1 UIT Unit Detail H O 0 1 2 N1 Party Identification H O 999999 1 3 N2 Additional Name Information H O 0 2 4 N3 Party Location H O 0 1 5 N4 Geographic Location H O 0 1 6 REF Reference Information H O 0 12 7 PER Administrative Communications Contact H O 0 3 8 FOB F.O.B. Related Instructions H O 0 1 9 DTM Date/Time Reference H M 100 1 10 UIT Unit Detail H O 0 1 11 QTY Quantity Information H O 0 1 12 REF Reference Information H O 0 999999 13 LIN Item Identification H O 999999 1 14 REF Reference Information H O 0 999999 15 QTY Quantity Information H O 0 1 16 PID Product/Item Description H O 0 1 17 OQS Order Quantity Sequence H O 0 1 18 SLN Subline Item Detail H O 100 1 19 N1 Party Identification H O 0 1 20 N2 Additional Name Information H O 0 1 21 N3 Party Location H O 0 1 22 N4 Geographic Location H O 0 1 23 REF Reference Information H O 0 1 24 PER Administrative Communications Contact H O 0 1 25 PID Product/Item Description H O 999999 1 26 QTY Quantity Information H O 0 1 27 MEA Measurements H O 0 10 28 CTT Transaction Totals H M 0 1 29