new (REXML::PullParser)

    # File rexml/pullparser.rb, line 28
      def initialize stream
    			if stream.kind_of? String
    				@source = Source.new stream
    			elsif stream.kind_of? IO
    				@source = IOSource.new stream
    			elsif stream.kind_of? Source
    				@source = stream
    			else
    				raise "#{stream.type} is not a valid input stream.  It must be \n"+
    				"either a String, IO, or Source."
    			end
    			@closed = nil
    			@document_status = nil
    			@tags = []
    			@stack = []
    			@entities = []
    		end