i hope you are talking about the technology VoiceXML , i give a bit of Introdution of VoiceXML below ,
VoiceXML (also known as VXML) is one of the tools for developing voice-enabled applications; it is a web-based markup language for representing human-computer dialogs, just like HyperText Markup Language (HTML). But while HTML assumes a graphical web browser, with display, keyboard and mouse, VoiceXML assumes a voice browser with audio output (computer-synthesized and/or recorded), and audio input (voice and/or keypad tones). VoiceXML technology allows a user to interact with the Internet through voice-recognition technology by using a voice browser and/or the telephone. The major goal of VoiceXML is to bring the advantage of web-based development and content delivery to Interactive Voice Response (IVR) system (voiceportalwhitepaper, 2001).
With VoiceXML, the product and services available on a corporate website can be accessed via the telephone on a self-service basis.
Human-to-human (H2H) interaction is one of the conventional approaches for communicating and receiving online services using a telephone. With this technique, the speed and success of getting a desired service and completing a task may depend on the human third party. Moreover, majority of present day e-Learning applications only have support for the web user interface (WUI) through the use of a personal computer (PC) and Wireless Application Protocol (WAP) using the mobile phone, with little or no support for voice.
Voice-enabled systems are applicable in several areas, such as information providers, financial institutions, e-health, education, etc. For example, in the financial institutions, an IVR system allows customers to call and request information; like calling your bank to confirm your balance . In educational institutions, a voice response application can provide information about class schedules, availability and course content.
and if you talk about Speech Application Language Tags please see
http://studentbank.in/report-speech-appl...ull-report for the report