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W04

Item Detail for Warehouse Shipping Order. ANSI ASC X12 segment whose function is to describe an item line in a warehouse shipping order.

Definition

The W04 segment (Item Detail for Warehouse Shipping Order) belongs to the ANSI ASC X12 segment directory. Its purpose: describe an item line in a warehouse shipping order.

Origin

Published by ASC X12 — the Accredited Standards Committee chartered by ANSI in 1979. Segments are released version by version (004010, 005010, 006020) and refined by Implementation Guides or TR3 documents (HIPAA).

Use

The W04 segment is used in X12 940 Warehouse Shipping Order item detail loop. Like every X12 segment, it starts with its three-character identifier, followed by elements separated by the data element separator declared in the ISA.

  • ISA — X12 interchange header.
  • GS — functional group header.
  • ST — Transaction Set header.

Last updated: May 14, 2026