Etext Template

I am working on a Delimiter based ETEXT Template.
Is there a way you can have 2 repeating fields on the same line that belong to 2 different levels in the hierarchy?  I can't figure out how to set this up in the Etext RTF template. 
In the example below  CheckNumber,VendorNo and CheckAmount are from the OutboundPayment level
and Invoicenum and InvoiceAmt is from DocumentPayable level.

Sample XML Data format:

 <OutboundPayment>
   <CheckNumber>1</CheckNumber>
   <VendorNo>123</VendorNo>
   <CheckAmount>1000</CheckAmount>
   -<DocumentPayable>
     <Invoicenum>Inv1</Invoicenum>
     <InvoiceAmt>600</InvoiceAmt>
    </DocumentPayable>
   -<DocumentPayable>
     <Invoicenum>Inv2</Invoicenum>
     <InvoiceAmt>400</InvoiceAmt>
    </DocumentPayable>
 </OutboundPayment>

CheckNumber_1|VendorNo|CheckAmount|Invoice_Num1|Invoice_Num1_Amt