Segment
No
Status
Max. Occ.
Segment
   
 
UNA
1
C
1
Service string advice
 
UNB
2
M
1
Interchange header
 
   
General Message Heading Section
   
 
UNH
3
M
1
Message header
 
BGM
4
M
1
Beginning of message
 
DTM
5
C
1
Date/time/period
 
SG1
    
C
10
RFF-DTM
 
RFF
6
M
1
Reference
 
DTM
7
C
10
Date/time/period
 
SG2
    
C
2
NAD-SG3-SG4
 
NAD
8
M
1
Name and address
 
SG3
    
C
10
RFF-DTM
 
RFF
9
M
1
Reference
 
DTM
10
C
10
Date/time/period
 
SG4
    
C
5
CTA-COM
 
CTA
11
M
1
Contact information
 
COM
12
C
9
Communication contact
 
   
General Message Detail Section
   
 
SG5
    
C
100
FTX-SG6
 
FTX
13
M
1
Free text
 
SG6
    
C
100
NAD-SG7-SG8
 
NAD
14
M
1
Name and address
 
SG7
    
C
10
RFF-DTM
 
RFF
15
M
1
Reference
 
DTM
16
C
10
Date/time/period
 
SG8
    
C
5
CTA-COM
 
CTA
17
M
1
Contact information
 
COM
18
C
5
Communication contact
 
   
General Message Summary Section
   
 
UNT
19
M
1
Message trailer
 
UNZ
20
M
1
Interchange trailer
Max. Occ. = Maximum occurrence of the segment/group, Status: M=Mandatory, C=Conditional, R=Required, O=Optional, A=Advised, D=Dependent