EDI Reference / segments / ST
ST

Transaction Set Header

Starts one business document inside the group.

Key elements

ElementNameWhat it carries
ST01 Transaction Set ID e.g. 850, 856, 810.
ST02 Control Number Echoed by the SE trailer.

Key elements only — the ones that matter in retail trade, not the full element list.

Appears in

850 · Purchase Order 855 · Purchase Order Acknowledgment 856 · Advance Ship Notice (ASN) 810 · Invoice 997 · Functional Acknowledgment 860 · Purchase Order Change 865 · PO Change Acknowledgment 846 · Inventory Inquiry / Advice 832 · Price / Sales Catalog 816 · Organizational Relationships 824 · Application Advice 940 · Warehouse Shipping Order 943 · Warehouse Stock Transfer Shipment Advice 944 · Warehouse Stock Transfer Receipt Advice 945 · Warehouse Shipping Advice 947 · Warehouse Inventory Adjustment Advice 204 · Motor Carrier Load Tender 214 · Transportation Carrier Shipment Status 875 · Grocery Products Purchase Order 877 · Manufacturer Coupon Family Code Structure 880 · Grocery Products Invoice

See a real ST in context — paste any X12 and the Inspector breaks out every segment.

Inspect an X12 free