# File rss/parser.rb, line 59
      def default_parser
        @@default_parser || AVAILABLE_PARSERS.first
      end

# File rss/parser.rb, line 65
      def default_parser=(new_value)
        if AVAILABLE_PARSERS.include?(new_value)
          @@default_parser = new_value
        else
          raise NotValidXMLParser.new(new_value)
        end
      end

# File rss/parser.rb, line 87
    def initialize(rss, parser_class=self.class.default_parser)
      @parser = parser_class.new(normalize_rss(rss))
    end

# File rss/parser.rb, line 73
      def parse(rss, do_validate=true, ignore_unknown_element=true,
                parser_class=default_parser)
        parser = new(rss, parser_class)
        parser.do_validate = do_validate
        parser.ignore_unknown_element = ignore_unknown_element
        parser.parse
      end