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The following is an example of a VoiceXML document:
When interpreted by a VoiceXML interpreter this will output "Hello world" with synthesized speech.
In most cases http is used at the transport protcol on top of TCP/IP. While the most simple of applications can use static VXML pages, most voice applications will use an application server like Tomcat, Weblogic, .NET server or WebSphere.
Two related formats that can be used within VoiceXML are Speech Synthesis Markup Language ( SSML ) and Speech Recognition Grammar Specification ( SRGS ). Also related but is seperate and in addition to VXML is Call Control eXtensible Markup Language ( CCXML).