This paper presents an industrial point of view regarding dialog description languages for dialog applications on embedded devices. We present GDML, a dialog description language developed for embedding dialogs in speech control systems in cars. Furthermore we present the environment used for developing speech dialog applications with GDML. As GDML is already used in existent products for years, we have collected a lot of experiences with it. This enables us, since we also worked with VoiceXML finally to compare both approaches.