# File die.rb, line 147
      def link(to_die)
        @regexp = to_die.regexp
        @datatype = to_die.datatype
        @range = to_die.range
        if not @arbitrary
          @order = to_die.order
          @closure = to_die.closure
          @option = to_die.option
          @collection = to_die.collection
          @track = to_die.track
        end
      end