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

  <SignedInfo>

    <ds:CanonicalizationMethod xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>

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

    <Reference URI="#ndid:1234-5678-0987">

      <Transforms>

        <Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>

      </Transforms>

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

      <DigestValue>sj1VXDB2VMCU5qmva2OtDw3kKOs=</DigestValue>

    </Reference>

  </SignedInfo>

  <SignatureValue>...</SignatureValue>

  <KeyInfo>

    <X509Data>

      <X509Certificate>...</X509Certificate>

    </X509Data>

  </KeyInfo>

</Signature>