recordsetStructure for nested xml structure

Hello experts,

We are receiving an invoice(.csv) file which should be converted to below structure which has 3 levels.

In Content Conversion, i set the parameter 'recordsetStructure = Header,1,Item*,SplitItem,*'. The problem with this is after 1st line item, the system is trying to create another header record.

Expected:

<Invoice>

     <Header>

          <Item>

               <Split Item>

               </Split Item>

          </Item>

          <Item>

               <Split Item>

               </Split Item>

          </Item>

          <Item>

               <Split Item>

               </Split Item>

          </Item>

     </Header>

<Invoice>

Actual:

<Invoice>

     <Header>

          <Item>

               <Split Item>

               </Split Item>

          </Item>

     </Header>

</Invoice>

<Invoice>

     <Item>

          <Split Item>

          </Split Item>

     </Item>

</Invoice>

<Invoice>

     <Item>

          <Split Item>

          </Split Item>

     </Item>

</Invoice>

How should i build the parameters to get the expected XML structure?

Regards,

Vishnu