Idoc mapping to group similar items under one idoc

Question

Hi,
I have a file to multiple idoc scenario.
My Source structure:
Msg type
   Data Type
          Header (1)  (field1, field 2, field 3 etc)
          ITEM( 0 to U)  (field X, field Y, field Z etc)
Target structure:
Idoc Type
     IDOC (1 to U)
     Begin
     Idoc Ports (1) (field a1, field a2, field a3 etc)
     Idoc_HDR (1) (field1, field Y, field 3 etc)
           Idoc_ITM (1 to 99999999)  (field X, field Z etc)
Idocs are generated only for some ITEM lines of source and so the value of field X is used and mapped to IDOC node using createif.
Rest of the mapping is done normally and works fine and creating multiple idocs if there are multiple ITEM lines in the source file. This mapping is doesn't work if I want to create multiple Idoc-ITMs
My requirement is to create multiple Idoc_ITM nodes under one parent IDOC node for for all ITEMs relating to one "field Y" of source. At the moment I am creating 4 idocs for the below example, but I want 3 like below:
For example:
Source file:
Country, city, date
emp1, department1, roleA
emp2, department1, roleB
emp3, department2, roleC
emp4, department3, roleC
Required Target file:
IDOC 1
Idoc_HDR
  Country, department1, date
  Idoc_ITM
  emp1, department1, roleA
  Idoc_ITM
  emp2, department1, roleB
IDOC 2
Idoc_HDR
  Country, department2, date
  Idoc_ITM
  emp3, department2, roleC
IDOC 3
Idoc_HDR
  Country, department3, date
  Idoc_ITM
  emp4, department3, roleC
How can achieve it please?
Many thanks.
Ramesh.

Answer 1

Hi Muni,
The source and required target xmls are here: I made it a bit simpler for better understanding and space.
If you want the xml of the source message structure, I can send that too.
Source:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:expense_source_msg xmlns:ns0="http://dtsp.com/postexpense">
   <Online_Expenses>
      <Expenses_Header>
         <Constant/>
         <BatchDate>20140320<BatchDate/>
         <Record_Count/>
         <Amount_Total/>
      </Expenses_Header>
      <Expenses_Item>
         <Employee_ID>test1<Employee_ID/>
         <Employee_Name>RAMESH<Employee_Name/>
         <price>10.00<price/>
         <Org_Unit>z1<Org_Unit/>
         <Type>Price<Type/>   
      </Expenses_Item>
      <Expenses_Item>
         <Employee_ID>test2<Employee_ID/>
         <Employee_Name>ANKIT<Employee_Name/>
         <price>20.00<price/>
         <Org_Unit>z2<Org_Unit/>
         <Type>Price<Type/>   
      </Expenses_Item>
      <Expenses_Item>
         <Employee_ID>test3<Employee_ID/>
         <Employee_Name>SIVA<Employee_Name/>
         <price>30.00<price/>
         <Org_Unit>z2<Org_Unit/>
         <Type>Price<Type/>   
      </Expenses_Item>
   </Online_Expenses>
Required Target:
</ns0:concur_online_expense_source_msg>
<?xml version="1.0" encoding="UTF-8"?>
<ZFI204_AR_INV01>
   <IDOC BEGIN="1">
      <EDI_DC40 SEGMENT="EDI_DC40">
         <TABNAM>EDI_DC40</TABNAM>
         <DIRECT>2</DIRECT>
         <IDOCTYP>ZFI204_AR_INV01</IDOCTYP>
         <MESTYP>ZFI204_AR_INV</MESTYP>
         <RCVPRN/>
      </EDI_DC40>
      <Z1ZFI204_HDR SEGMENT="Z1ZFI204_HDR">
         <DOCUMENT_TYPE>KX</DOCUMENT_TYPE>
         <DOCUMENT_DATE>20140320</DOCUMENT_DATE>
         <POSTING_DATE>20140320</POSTING_DATE>
         <COMPANY_CODE>z1</COMPANY_CODE>    
         <Z1ZFI204_ITM SEGMENT="Z1ZFI204_ITM">
            <NET_INVOICE_AMOUNT>10.00</NET_INVOICE_AMOUNT>
            <EMPLOYEE_NAME>RAMESH</EMPLOYEE_NAME>
            <EMPLOYEE_NUMBER>test1</EMPLOYEE_NUMBER>
         </Z1ZFI204_ITM>
      </Z1ZFI204_HDR>
   </IDOC>
   <IDOC BEGIN="1">
      <EDI_DC40 SEGMENT="EDI_DC40">
         <TABNAM>EDI_DC40</TABNAM>
         <DIRECT>2</DIRECT>
         <IDOCTYP>ZFI204_AR_INV01</IDOCTYP>
         <MESTYP>ZFI204_AR_INV</MESTYP>
         <RCVPRN/>
      </EDI_DC40>
      <Z1ZFI204_HDR SEGMENT="Z1ZFI204_HDR">
         <DOCUMENT_TYPE>KX</DOCUMENT_TYPE>
         <DOCUMENT_DATE>20140320</DOCUMENT_DATE>
         <POSTING_DATE>20140320</POSTING_DATE>
         <COMPANY_CODE>z2</COMPANY_CODE>    
         <Z1ZFI204_ITM SEGMENT="Z1ZFI204_ITM">
            <NET_INVOICE_AMOUNT>20.00</NET_INVOICE_AMOUNT>
            <EMPLOYEE_NAME>ANKIT</EMPLOYEE_NAME>
            <EMPLOYEE_NUMBER>test2</EMPLOYEE_NUMBER>
         </Z1ZFI204_ITM>
         <Z1ZFI204_ITM SEGMENT="Z1ZFI204_ITM">
            <NET_INVOICE_AMOUNT>30.00</NET_INVOICE_AMOUNT>
            <EMPLOYEE_NAME>SIVA</EMPLOYEE_NAME>
            <EMPLOYEE_NUMBER>test3</EMPLOYEE_NUMBER>
         </Z1ZFI204_ITM>
      </Z1ZFI204_HDR>
   </IDOC>
</ZFI204_AR_INV01>