UN/EDIFACT Syntax Version 3 Segment List

	UCD	Data element error indication
	UCF	Group response
	UCI	Interchange response
	UCM	Message/package response
	UCS	Segment error indication
	UNA	Service String Advice
	UNB	Interchange header
	UNE	Group trailer
	UNG	Group header
	UNH	Message header
	UNS	Section control
	UNT	Message trailer
	UNZ	Interchange trailer

Change indicators
plus sign		An addition.
asterisk		Addition/substraction/change to a code entry for a particular data element.
hash or pound sign		Changes to names.
vertical bar		Changes to text for descriptions, notes and functions.
minus sign		A deletion.
letter X		Marked for deletion.