Ugly REXML::UndefinedNamespaceException workaround

gistfile1.rb

require "rexml/document"

# in this case monkey patch to be able to read Inkscape "plain svg" files
# make the namespace stack start out to have inkscape: and sodipodi:
module REXML
  module Parsers
    class BaseParser
      alias_method :old_stream, :stream=
      def stream=(source)
        old_stream(source)
        @nsstack.unshift(Set.new(["inkscape", "sodipodi"]))
      end
    end
  end
end

REXML::Document.new(File.read(ARGV[0])).write