# File temp/document.rb, line 66
                def add( child )
                        if child.kind_of? XMLDecl
                                @children.unshift child
        child.parent = self
                        elsif child.kind_of? DocType
        # Find first Element or DocType node and insert the decl right 
        # before it.  If there is no such node, just insert the child at the
        # end.  If there is a child and it is an DocType, then replace it.
        insert_before_index = 0
        @children.find { |x| 
          insert_before_index += 1
          x.kind_of?(Element) || x.kind_of?(DocType)
        }
        if @children[ insert_before_index ] # Not null = not end of list
          if @children[ insert_before_index ].kind_of DocType
            @children[ insert_before_index ] = child
          else
            @children[ index_before_index-1, 0 ] = child
          end
        else  # Insert at end of list
          @children[insert_before_index] = child
        end
                                child.parent = self
                        else
                                rv = super
                                raise "attempted adding second root element to document" if @elements.size > 1
                                rv
                        end
                end