How to create additional Line in file based on condition available as part of ZINVOIC02 Idoc segment

Question

Scenario Details:
Receiving Zinvoic02 Idoc in PI. Idoc to file translation creates comma separated file with .csv extn
The logic was kept in such a way that how many E1EDP01 (items) are available in IDoc that many no of records will be created in csv file.
The file logic for some the fields is as below:
No of records
InvNumber
InvDate
CusNumber
LineitemDesc
Tax1Type
Tax1%
for 1st E1EDP01
E1EDK01-BELNR
E1EDK03-DATUM
E1EDK01-PARTN
Populate when E1EDP04/MSKWZ=O2 or O4 with E1EDP19/KTEXT
Hardcode when E1EDP04/MSKWZ=O2 or O4
Sum all E1EDP04 /MSATZ when E1EDP04/MSKWZ=O2 or O4
for 2nd E1EDP01
E1EDK01-BELNR
E1EDK01-DATUM
E1EDK01-PARTN
same as above
same as above
same as above
for 3rd E1EDP01
E1EDK01-BELNR
E1EDK03-DATUM
E1EDK01-PARTN
same as above
same as above
same as above
Additional Line to be created when one or more of E1EDP01 is having E1EDP04/MSKWZ = O3
same as above
same as above
same as above
Hardcode "REIM for USE TAX"
Hardcode ""
Hardcode ""
Now we have got addition requirement to add a new lineitem when tax code is equal to O3 for any of the E1EDP01.
Is it possible to create additional lineitem based on condition. If yes, please share what should be the approach.
How we can create the additional lineitem?
Currently we are using E1EDP01 to do context handling.
The target structure is :
MT_FILE
     INVOICE     0..unbounded
          InvNumber     0..1
          InvDate          0..1
          CusNumber     0..1
          LineitemDesc     0..1
          Tax1Type          0..1
          Tax1%               0..1

Answer 1

Hello,
Please add one extra field in the data structure of the target mapping and let its occurrence be 0..unbounded under the root node 'MT_ADP_Invoice'.
Apply the condition, if tax code MSKWZ (with its context changed to E1EDP01) equalsS to '03', then map it to the newly created target field whose occurrence is 0..unbounded.
This will then create an additional field which is your requirement.
The above is one way.
But if you want to have the same target field name as ADP_File appended for tax field being '03'.
Then in that case you can you two message mapping for one common operational mapping / interface.
In the first message mapping you need to have one target data structure created with the source data structure remaining the same as the one shown by you in scrn shot. Now this target data structure will be similar to the source, except that you need to add one more field at the end(name different from other fields) in target (whose occurrence should be 0..unbounded), and it needs to be mapped to E1EDP01 provided the tax code field MSKWZ(its context changed to E1EDP01) equalsS to constant '03'.
In the second message mapping you need to map the target structure of previous message mapping to the actual required structure. The newly added field should be mapped to ADP_File of your final target structure.
This will then create the same structure as required.
Note : Please change the occurence of ADP_File to 0..unbounded.
Regards,
Souvik