[xmlsec] how To sign template file with <cfg:authority> as a rootelement

[Jesse Pelton]

The error message is correct: you haven't defined the "cfg:" prefix.  If
you need information on the use of namespaces (including prefixes and
default namespaces), see http://www.w3.org/TR/REC-xml-names/ and/or
http://www.w3.org/TR/xml-names11/.