    # File lib/nokogiri/xml/document_fragment.rb, line 4
          def initialize document, tags=nil
            if tags
              parser = if self.kind_of?(Nokogiri::HTML::DocumentFragment)
                         HTML::SAX::Parser.new(FragmentHandler.new(self, tags))
                       else
                         XML::SAX::Parser.new(FragmentHandler.new(self, tags))
                       end
              parser.parse(tags)
            end
          end