$ perl -MEncode -e'
   print encode "iso-8859-1",  # Wrong!
      qq{<?xml version="1.0" encoding="UTF-8"?>\n} .
      qq{<Name>Issu\x{E9}T\x{E9}st</Name>\n};
' >in.xml

$ perl -e'         
   use open ":std", ":encoding(UTF-8)";  # I have a UTF-8 terminal
   use XML::DOM;                                    
   my $parser = XML::DOM::Parser->new();
   my $doc = $parser->parsefile("in.xml");
   print $doc->toString();
'

not well-formed (invalid token) at line 2, column 10, byte 49 at .../XML/Parser.pm line 187