Signing an XML with Report SSF02

Hi Experts,

I am a newby in signing documents and I am facing a problem with signing an XML using report SSF02. I can sign an XML and it looks like:

But I expected something like that:

<?xml version="1.0" encoding="UTF-8"?>

<PurchaseOrder>

<Item number="130046593231">

  <Description>Video Game</Description>

  <Price>10.29</Price>

</Item>

<Buyer id="8492340">

  <Name>My Name</Name>

  <Address>

  <Street>One Network Drive</Street>

  <Town>Burlington</Town>

  <State>MA</State>

  <Country>United States</Country>

  <PostalCode>01803</PostalCode>

  </Address>

</Buyer>

<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">

  <SignedInfo>

  <CanonicalizationMethod

  Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>

  <SignatureMethod

  Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>

  <Reference URI="">

  <Transforms>

  <Transform

  Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>

  </Transforms>

  <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>

  <DigestValue>tVicGh6V+8cHbVYFIU91o5+L3OQ=</DigestValue>

  </Reference>

  </SignedInfo>

  <SignatureValue>

  dJDHiGQMaKN8iPuWApAL57eVnxz2BQtyujwfPSgE7HyKoxYtoRB97ocxZ

  8ZU440wHtE39ZwRGIjvwor3WfURxnIgnI1CChMXXwoGpHH//Zc0z4ejaz

  DuCNEq4Mm4OUVTiEVuwcWAOMkfDHaM82awYQiOGcwMbZe38UX0oPJ2DOE=

  </SignatureValue>

  <KeyInfo>

  <X509Data>

  <X509SubjectName>

  CN=My Name,O=Test Certificates Inc.,C=US

  </X509SubjectName>

  <X509Certificate>

  MIIB9zCCAWCgAwIBAgIERZwdkzANBgkqhkiG9w0BAQUFADBAMQswCQYD

  VQQGEwJVUzEfMB0GA1UEChMWVGVzdCBDZXJ0aWZpY2F0ZXMgSW5jLjEQ

  MA4GA1UEAxMHTXkgTmFtZTAeFw0wNzAxMDMyMTE4MTFaFw0zMTA4MjUy

  ...

  </X509Certificate>

  </X509Data>

  </KeyInfo>

</Signature>

</PurchaseOrder>

What do I wrong? Can someone give me some advise or does someone have an example how to handle signing xml within ABAP?

Thanks in advance.

Cheers, Alex