initialize_variables

# File lib/rss/rss.rb, line 651
    def initialize_variables(attrs)
      normalized_attrs = {}
      attrs.each do |key, value|
        normalized_attrs[key.to_s] = value
      end
      self.class.need_initialize_variables.each do |variable_name|
        value = normalized_attrs[variable_name.to_s]
        if value
          __send__("#{variable_name}=", value)
        else
          instance_eval("@#{variable_name} = nil")
        end
      end
      initialize_have_children_elements
      @content = "" if self.class.have_content?
    end