Hello,
By looking ur source and target strcurture, i believe that u want to map CURRECNY_CODE (present under header) to CURRENCY target field?
If yes, then u have to use "useoneas many" function and ur mapping will be:
CURRECNY_CODE-----
LINE_IETM-----------------useoneasmany---splitby value(Each value) ----CURRENCY
LINE_IETM-----------------
Thanks
Amit Srivastava