parse_err(strict, errors, "illegal value #{params[:VALUE]} of :VALUE given for #{prop}", ctx) if params[:VALUE] && params[:VALUE] != "binary" && params[:VALUE] != "uri"
          parse_err(strict, errors, "illegal value #{params[:ENCODING]} of :ENCODING given for #{prop}", ctx) if params[:ENCODING] && (params[:ENCODING] != "b" || params[:VALUE] == "uri")