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X12-DE-128

ASC X12 data element 128 — Reference Identification Qualifier.

Definition

Element 128 (Reference Identification Qualifier) is among the most-used in X12 — codes: PO = Purchase Order, BM = Bill of Lading, IV = Invoice, CN = Carrier Pro, DP = Department Number, IA = Internal Vendor Number, ZZ = mutually defined.

Origin

Published by ASC X12 in the Data Element Dictionary (TS 838). Maintained under ANSI ASC X12 governance with semi-annual reviews.

Example in context

REF*PO*4500123456~ — Purchase Order reference 4500123456.

  • REF — segment carrying DE 128.
  • X12 DE 127 — related reference value.

Last updated: May 15, 2026