D18A
Segment D18A/SGU
SEGMENT USAGE DETAILS
To specify the details of the usage of a segment within a message type structure.
Segment structure
9166 SEGMENT TAG IDENTIFIER M an1..3 7299 REQUIREMENT DESIGNATOR CODE C an1..3 6176 OCCURRENCES MAXIMUM NUMBER C n1..7 7168 LEVEL NUMBER C n1..3 1050 SEQUENCE POSITION IDENTIFIER C an1..10 1049 MESSAGE SECTION CODE C an1..3 4513 MAINTENANCE OPERATION CODE C an1..3