HL (X12)

ASC X12 HL segment, the backbone of the 856 (ASN) hierarchical loop model.

Definition

HL carries a unique loop ID (HL01), the parent's ID (HL02) and a level code (HL03: S=Shipment, O=Order, T=Tare/pack, I=Item). HL04 flags whether child levels follow. In the 856, the S→O→T→I nesting describes what is shipped, by order, pallet and item.

Origin

Defined in the ASC X12 Transaction Set Implementation Guides (HL segment, position 0100 of the 856), maintained by the Accredited Standards Committee X12 under ANSI.

Example in context

HL*1**S~ (Shipment) then HL*2*1*O~ (Order, parent=1) then HL*3*2*I~ (Item, parent=2)

Related terms

• X12 856 HL — the ASN transaction set built on these loops.
• SN1 (X12) — shipped quantity at the Item level.