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UCM -

Message/package response
UN/EDIFACT Syntax Version 4 Segment List

Function:To identify a message or package in the subject interchange, and to indicate that message's or package's acknowledgement or rejection (action taken), and to identify any error related to the UNH, UNT, UNO, and UNP segments. It can also identify errors related to the USA, USC, USD, USH, USR, UST, or USU security segments when they appear at the message or package level.
This segment also occurs in the following versions of this standard:
30000, 40000, 40100

Pos Segment M/C Repeat Repr. Notes
010 0062 Message reference number C 1 an..14
020 S009 MESSAGE IDENTIFIER C 1
0065 Message type M an..6
0052 Message version number M an..3
0054 Message release number M an..3
0051 Controlling agency, coded M an..3
0057 Association assigned code C an..6
0110 Code list directory version number C an..6
0113 Message type sub-function identification C an..6
030 0083 Action, coded M 1 an..3
040 0085 Syntax error, coded C 1 an..3
050 0135 Service segment tag, coded C 1 an..3
060 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
070 0800 Package reference number C 1 an..35
080 S020 REFERENCE IDENTIFICATION C 99
0813 Reference qualifier M an..3
0802 Reference identification number M an..35
090 0534 Security reference number C 1 an..14
100 0138 Security segment position C 1 n..6

PosPosition
M/CMandatory or Conditional
Repr.Representation (Data or Content Type)
Dependency Notes:
1.D1(010, 070) One and only one
2.D2(010, 020) All or none
3.D2(070, 080) All or none
4.D5(050, 040) If first, then all
5.D5(060, 050, 040) If first, then all
6.D5(090, 050, 040, 100) If first, then all
7.D5(100, 090, 050, 040) If first, then all
Other Notes:
8.0135, may only contain the values UNH, UNT, UNO, UNP, USA, USC, USD, USH, USR, UST, or USU.
9.This data element shall be present when reporting an error in a security segment.

Segment UCM 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.

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