Lenguaje 4DComandosMétodos baseVersión: SiguienteMétodos base$1 -> Método base On Backup ShutdownMétodo base On Backup Startup : IntegerMétodo base On DropMétodo base On Exit$1 -> Método base On Host Database EventmobileInfo -> Método base On Mobile App Action : ObjectMétodo base On Mobile App Authentication ( infoMovil ; estado )$1, $2, $3, $4 -> On REST Authentication database method -> $0$1, $2, $3 -> Método base On Server Close Connection$1, $2, $3 -> Método base On Server Open Connection -> $0Método base On Server ShutdownMétodo base On Server Startup$user, $pw, $ip -> Método base On SQL Authentication : BooleanMétodo base On Startup$event -> Método base On System Event$url, $http, $ipBrowser, $ipServer, $user, $pw -> Método base On Web Authentication : Boolean$url, $http, $ipBrowser, $ipServer, $user, $pw -> Método base On Web ConnectionMétodo base On Web Legacy Close Session