860
X12 860 transaction set, the buyer-initiated purchase-order change request.
Definition
The 860 changes an existing 850. Its header opens with the BCH segment (Beginning Segment for Purchase Order Change), whose purpose element commonly signals 04 (Change) or 01 (Cancellation). Line-level changes are carried in POC loops, which identify the line to change and the change action applied (quantity, price, add, delete).
Origin
Defined by ASC X12 (ANSI-accredited standards body since 1979); the 860 belongs to functional group PC (Purchase Order Change Request — Buyer Initiated).
Example in context
BCH*04*NE*PO-12345**20260620~ then POC*1*CT*5*10*EA*9.50*PE~ — quantity change (CT) from 5 to 10 units on line 1.