EDIFACT UNH Segment: Message Header

Identifies the start of a message and specifies the message type, version, and other identification information.

Segment Code: UNH
Mandatory: Yes
Position: Start of message

UNH Syntax Example

UNH - Message Header
UNH+1+ORDERS:D:96A:UN'

Data Elements

PositionNameDescription
0062Message reference numberUnique reference assigned by the sender
S009Message identifierComposite identifying the message type (e.g., ORDERS:D:96A:UN)

Common Mistakes

  • ⚠Missing message reference number
  • ⚠Incorrect version/release format
  • ⚠Mismatch with UNT trailer reference

Other EDIFACT Segments

UNTBGMDTMNADLINQTYPRIMOAUNBUNZRFFUNS

Related Resources

EDI Implementation

Step-by-step implementation guide

EDI Example

Real EDI message sample

EDIFACT Examples

EDIFACT message samples

All EDI Examples

Complete examples library

EDI Invoice Example

INVOIC and 810 samples

EDI Order Example

ORDERS and 850 samples

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