class REXML::Parsers::SAX2Parser

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