UCI -

Interchange response
UN/EDIFACT Syntax Version 4 Segment List

	Function:	To identify the subject interchange, to indicate interchange receipt, to indicate acknowledgement or rejection (action taken) of the UNA, UNB and UNZ segments, and to identify any error related to these segments. It can also identify errors related to the USA, USC, USD, USH, USR, UST, or USU security segments when they appear at the interchange level. Depending on the action code, it may also indicate the action taken on the groups, messages, and packages within that interchange.
	This segment also occurs in the following versions of this standard: 30000, 40000, 40100

Pos			M/C	Repeat	Repr.	Notes
010	0020	Interchange control reference	M	1	an..14
020	S002	INTERCHANGE SENDER	M	1
	0004	Interchange sender identification	M		an..35
	0007	Identification code qualifier	C		an..4
	0008	Interchange sender internal identification	C		an..35
	0042	Interchange sender internal sub-identification	C		an..35
030	S003	INTERCHANGE RECIPIENT	M	1
	0010	Interchange recipient identification	M		an..35
	0007	Identification code qualifier	C		an..4
	0014	Interchange recipient internal identification	C		an..35
	0046	Interchange recipient internal sub-identification	C		an..35
040	0083	Action, coded	M	1	an..3
050	0085	Syntax error, coded	C	1	an..3
060	0135	Service segment tag, coded	C	1	an..3
070	S011	DATA ELEMENT IDENTIFICATION	C	1
	0098	Erroneous data element position in segment	M		n..3
	0104	Erroneous component data element position	C		n..3	1, 2
	0136	Erroneous data element occurrence	C		n..6	1, 3
080	0534	Security reference number	C	1	an..14
090	0138	Security segment position	C	1	n..6

Dependency Notes:
Pos	Position
M/C	Mandatory or Conditional
Repr.	Representation (Data or Content Type)
1.	D5(060, 050) If first, then all
2.	D5(070, 060, 050) If first, then all
3.	D5(080, 060, 050, 090) If first, then all
4.	D5(090, 080, 060, 050) If first, then all
Other Notes:
5.	0135, may only contain the values UNA, UNB, UNZ, USA, USC, USD, USH, USR, UST, or USU.
6.	This data element shall be present when reporting an error in a security segment.

Segment UCI is used in the following messages:
CONTRL

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.