Voice Extensible Markup Language Status
http://www.stc.org/intercom/PDFs/2004/200404_23-25.pdf

Lippincott, Richard J.
Intercom
2004

Abstract:

Introduces readers to Voice Extensible Markup Language (VXML), a markup language that allows vocal interaction between users and applications via a telephone-based communication system. The author also discusses World Wide Web Consortium specifications for VXML.