text/plain text/xml application/xml text/sgml application/sgml text/tab-separated-values message/rfc822 text/html application/xhtml+xml http://www.w3.org/TR/2001/REC-xml-c14n-20010315 http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments http://www.w3.org/2001/10/xml-exc-c14n# http://www.w3.org/2001/10/xml-exc-c14n#WithComments http://www.w3.org/2000/09/xmldsig#base64 http://www.w3.org/TR/1999/REC-xpath-19991116 http://www.w3.org/2002/06/xmldsig-filter2 http://www.w3.org/2000/09/xmldsig#enveloped-signature http://www.w3.org/TR/1999/REC-xslt-19991116 SecureSignatureKeypair CertifiedKeypair 1.0 1.1 1.2