Just Say "Help": Implementing Help in VoiceXML
http://www.winwriters.com/vxml.htm

Beebe, Allen
WritersUA
2002

Abstract:

One of the exciting aspects of XML is the number of ways it is being used to provide new means of communicating and gathering new information. One such use is VoiceXML, an emerging W3C standard that brings voice to the Web or the Web to the phone.