Scope of VoiceXML (Basic Language Characteristics)

• audio output (pre-recorded audio, TTS)
  (TTS styling can be done by SSML)
• recognition of spoken and DTMF input
  (SRGS or JSGF grammars for input recognition, SISR for semantic interpretations)
• recording of spoken input
• dialog control flow
  (with a document or cross document)
• telephony features
  (call transfer, disconnect)