# File ../../auditor/lib/kasp_auditor/config.rb, line 217
      def initialize(e)
        ttl_text = e.elements['TTL'].text
        @ttl = Config.xsd_duration_to_seconds(ttl_text)
        min_text = e.elements['Minimum'].text
        @minimum = Config.xsd_duration_to_seconds(min_text)
        @serial = e.elements['Serial'].text
        if (!([UNIXTIME, COUNTER, DATECOUNTER, KEEP].include?@serial))
          # @TODO@ Log errors encountered in config?
          # Leave to policy configuration auditor
          print "ERROR : zone serial type incorrect! (#{@serial} found)\n"
        end
      end