UN/EDIFACT Syntax Version 3 Revision 1997A Service Code List

Code		Description	Repr
	0001	Syntax identifier	a4
	0002	Synatx version number	an1
	0007	Partner identification code qualifier	an..4
	0025	Recipient's reference/password qualifier	an2
	0029	Processing priority code	a1
	0031	Acknowledgement request	n1
	0035	Test indicator	n1
	0051	Controlling agency	an..2
	0052	Message version number	an..3
	0054	Message release number	an..3
	0065	Message type identifier	an..6
	0073	First/last sequence message transfer indication	a1
	0081	Section identification	a1
	0083	Action, coded	an..3
	0085	Syntax Error, coded	an..3

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.