handle_entitydecl

# File lib/rexml/parsers/sax2parser.rb, line 201
      def handle_entitydecl( event )
        @entities[ event[1] ] = event[2] if event.size == 3
        parameter_reference_p = false
        case event[2]
        when "SYSTEM"
          if event.size == 5
            if event.last == "%"
              parameter_reference_p = true
            else
              event[4, 0] = "NDATA"
            end
          end
        when "PUBLIC"
          if event.size == 6
            if event.last == "%"
              parameter_reference_p = true
            else
              event[5, 0] = "NDATA"
            end
          end
        else
          parameter_reference_p = (event.size == 4)
        end
        event[1, 0] = event.pop if parameter_reference_p
        handle( event[0], event[1..-1] )
      end