Motivations for VoiceXML Development

• shield application authors from low-level, vendor specific APIs
  • Automated Speech Recognition (ASR) engine API (VoiceXML, SRGS, SISR)
  • Text-To-Speech (TTS, a.k.a. speech synthesis) API (VoiceXML, SSML)
  • telephony hardware and software API, basic telephony functions (VoiceXML)
  • coordination of the three above (VoiceXML)
• separate user interaction code and presentation logic from service (backend, business layer) logic
• promote voice application portability, reduce development costs and eliminate vendor lock-in
• shared database and application layers between VoiceXML and traditional GUI web applications