PROSRV
Product service message

UNH M Message header

BGM M Beginning of message

DTM M Date/time/period

CUX C Currencies

SG1 C
RFF
DTM

SG2 C
NAD
FII
SG3
...

SG5 C
DOC
DTM
STS
...

UNS M Section control

CNT C Control total

MOA C Monetary amount

SG19 C
TAX
MOA

UNT M Message trailer