# File rss/image.rb, line 161
      def initialize(*args)
        if Utils.element_initialize_arguments?(args)
          super
        else
          super()
          self.about = args[0]
          self.size = args[1]
        end
      end

# File rss/image.rb, line 127
        def required_prefix
          IMAGE_PREFIX
        end

# File rss/image.rb, line 131
        def required_uri
          IMAGE_URI
        end

# File rss/image.rb, line 171
      def full_name
        tag_name_with_prefix(IMAGE_PREFIX)
      end

# File rss/image.rb, line 147
      def size=(new_value)
        if @do_validate and !new_value.nil?
          new_value = new_value.strip
          unless AVAILABLE_SIZES.include?(new_value)
            attr_name = "#{IMAGE_PREFIX}:size"
            raise NotAvailableValueError.new(full_name, new_value, attr_name)
          end
        end
        __send__(:_size=, new_value)
      end