alternate=

# File lib/rss/xml-stylesheet.rb, line 80
    def alternate=(value)
      if value.nil? or /\A(?:yes|no)\z/ =~ value
        @alternate = value
      else
        if @do_validate
          args = ["?xml-stylesheet?", %[alternate="#{value}"]]
          raise NotAvailableValueError.new(*args)
        end
      end
      @alternate
    end