start_else_element

# File lib/rss/parser.rb, line 387
    def start_else_element(local, prefix, attrs, ns)
      class_name = self.class.class_name(_ns(ns, prefix), local)
      current_class = @last_element.class
      if known_class?(current_class, class_name)
        next_class = current_class.const_get(class_name)
        start_have_something_element(local, prefix, attrs, ns, next_class)
      else
        if !@do_validate or @ignore_unknown_element
          @proc_stack.push(setup_next_element_in_unknown_element)
        else
          parent = "ROOT ELEMENT???"
          if current_class.tag_name
            parent = current_class.tag_name
          end
          raise NotExpectedTagError.new(local, _ns(ns, prefix), parent)
        end
      end
    end