Create xml file with nested internla table or with header & item tables

Question

Hi I have a requirement like, I need to create an xml file for header and item details. For 1 header there may be multiple line items.
I did search in forums some where I came to know that we can use XSL:IF to achieve this. but I could not able to do this.
I tried with using nested internal tables also but now luck.
can anybody please suggest how can we create xml for header and item detials.
<xsl:transform version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:sap="http://www.sap.com/sapxsl"
  xmlns:asx="http://www.sap.com/abapxml"
  exclude-result-prefixes="asx"
>
<xsl:template match="/">
  <OrbisomRequest>
    <xsl:attribute name="Version">
      <xsl:value-of select="11.1"/>
    </xsl:attribute>
    <xsl:attribute name="IssuerID">
      <xsl:value-of select="1"/>
    </xsl:attribute>
    <xsl:for-each select="asx:abap[1]/asx:values[1]/T_FINAL[1]/*">
<CreateApprovedPurchaseRequest
       RerquestID="{VBLNR}"
       CommonName="User1"
       Amount="{WRBTR}"
       Comment="TestComment"
       CurrencyCode="978"
       PurchaseType="All"
       SupplierName="All"
       VCardAlias="PurchaseCard"
       ValidFrom="1M"
       CurrencyType="B">
                <CDFs>
                  <Invoice> <xsl:value-of select="BELNR"/> </Invoice>
                  <Amount> <xsl:value-of select="WRBTR"/> </Amount>
                </CDFs>
      </CreateApprovedPurchaseRequest>
    </xsl:for-each>
  </OrbisomRequest>
</xsl:template>
</xsl:transform>
here belnr and wrbtr will be my item details. for each payment document I can have multiple invoices. in CDF I need to display the invoices for that particular payment document.
what conditions can I put there before CDFs to make the item internal table to loop based on header internal table.
Regards,
Ranganadh.

Answer 1

Looks like you have already created the transformation "Z_ID"
Take a look at the following thread, it answers many of the questions you have asked:
[ABAP data to XML conv with UTF-8 encoding and custom namespace|Re: ABAP data to XML conv with UTF-8 encoding and custom namespace;
Che