text: SIGNATURE = '<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">' \
              '<SignedInfo>' \
              '<CanonicalizationMethod Algorithm="http://www.w3.org/2006/12/xml-c14n11"/>' \
              '<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>' \
              '<Reference>' \
              '<Transforms>' \
              '<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>' \
              '<Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>' \
              '</Transforms>' \
              '<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>' \
              '<DigestValue />' \
              '</Reference>' \
              '</SignedInfo>' \
              '<SignatureValue />' \
              '<KeyInfo><X509Data />' \
              '</KeyInfo>' \
              '</Signature>'
  