# File /home/ser/Work/rexml/rexml/document.rb, line 52
  def add( child )
			if child.kind_of? XMLDecl
				@children.unshift child
			elsif child.kind_of? DocType
				if @children[0].kind_of? XMLDecl
					@children[1,0] = child
				else
					@children.unshift child
				end
			else
				rv = super
				raise "attempted adding second root element to document" if @elements.size > 1
				rv
			end
		end