Segment Group

UN/EDIFACT message-structuring concept defined by the ISO 9735 syntax.

Definition

A segment group bundles related segments (for example a LIN with its PIA, IMD and QTY) under an identifier such as SG26. It carries its own status (mandatory/conditional) and its own maximum repetition count, and may be nested inside another group.

Origin

The segment-group mechanism is defined by ISO 9735 (EDIFACT application level syntax rules) and applied in every Message Implementation Guideline published through UNTDID by UN/CEFACT.

Example in context

SG26 in ORDERS: LIN (trigger, M 1) + PIA (C 25) + IMD (C 999) + QTY (C 999), the group repeating up to 200000 times.

Related terms

• SEGMENT — the base unit that composes a group.
• EDIFACT ISO 9735-1 — syntax rules.