write (REXML::DocType)

    # File rexml/doctype.rb, line 113
      def write( output, indent=0, transitive=false )
    			indent( output, indent )
    			output << START
    			output << ' '
    			output << @name
    			output << " #@external_id" unless @external_id.nil?
    			unless @children.empty?
    				next_indent = indent + 2
    				output << ' ['
    				child = nil		# speed
    				@children.each { |child|
    					output << "\n"
    					child.write( output, next_indent )
    				}
    				output << "\n"
    				#output << '   '*next_indent
    				output << "]"
    			end
    			output << STOP
    		end