De
   
|
En
                                                                      
 
Segment
No
Status
Max. Occ.
Segment
   
 
UNA
1
C
1
Service string advice
 
UNB
2
M
1
Interchange header
 
UNG
3
C
1
Functional group header
 
UNE
4
C
1
Functional group trailer
 
UNZ
5
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