VoiceXML

"Definitive VXML" book: code examples
Interesting numerous VXML examples from the book "Definitive VXML"
http://www.voicexml.org/edu/examples/definitive_vxml.html

Ecmascript language specification (ECMA-262)
The ECMAScript language that is used by VXML to provide client-side scripting capabilities. Compact profile ECMA-367 is used within SRGS grammars to support semantic interpretation.
http://www.ecma-international.org/publications/standards/Ecma-262.htm

Ken Rehor's World of VoiceXML
An index of VXML resources and events maintained by Ken Rehor, the "principal founder of the VoiceXML Forum".
http://www.kenrehor.com/voicexml/

Palowireless VoiceXML Resource Center
VoiceXML Resources including conferences, articles, news, development tools, market research, technology, tutorials.
http://www.palowireless.com/voicexml

Semantic Interpretation for Speech Recognition (SISR)
The specifications which describes how tags within SRGS grammars may be inserted to support basic post-processing or full semantic interpretation. This is then used by VXML to support advanced features such as mixed initiative.
http://www.w3.org/TR/semantic-interpretation/

Speech Recognition Grammar Specification (SRGS) Version 1.0
The W3C specifications used by VXML to enable speech recognition
http://www.w3.org/TR/speech-grammar/

Speech Synthesis Markup Language (SSML) Version 1.0
The W3C specifications used by VXML to provide speech synthesis.
http://www.w3.org/TR/speech-synthesis/

Voice Browser Call Control: CCXML Version 1.0
The upcoming call control language for more elaborate control than VXML transfer. CCXML uses VXML to specify dialogs with connected call parties.
http://www.w3.org/TR/ccxml/

Voice category at developer.com
Voice-technology related tutorials and articles including introduction to VXML, natural vs directed dialogs, SRGS and CCXML introductions
http://www.developer.com/voice/

Voice Extensible Markup Language (VXML) Version 2.0
Pointer to the latest 2.0 specification including new errata published by the W3C consortium.
http://www.w3.org/TR/voicexml20/

Voice Extensible Markup Language (VXML) Version 2.1
The pointer to the latest 2.1 draft specifications including errata. Version 2.1 is a minor refinement of 2.0 with features that are simple, already implemented by some vendors, and not already available within 2.0 version.
http://www.w3.org/TR/voicexml21/

Voice Extensible Markup Language (VXML) version 1.0
Official note specification; designed for creating audio dialogs that feature synthesized speech, digitized audio, recognition of spoken and DTMF key input, recording of spoken input, telephony, and mixed-initiative conversations. (W3C Note 05 May 2000)
http://www.w3.org/TR/voicexml/

VoiceXml Yahoo Group
VoiceXml user group at Yahoo. Includes discussions and experiences with VoiceXML syntax and applications.
http://tech.groups.yahoo.com/group/voicexml/

VoiceXML Forum
Organization dedicated to promoting VXML. Main activities include developer and platform certifications, education (tutorials and newsletters), and tools fostering. Delegates VXML standardisation to W3C. Hosted by IEEE-ISTO.
http://www.voicexml.org/

VXML Tutorial for Perl Programmers
WebReference.com's tutorial on VoiceXML, entitled "Tellme More."
http://www.webreference.com/perl/tutorial/20/

W3C: Voice Browser Activity
Portal of the activity of the W3C Voice Browser Working Group including public mailing list, links to current status, work under development, links to drafts and specifications, FAQs.
http://www.w3.org/Voice/

W3C's Introduction to VoiceXML 2.0
A nice VXML tutorial provided by Dave Raggett to the W3C. A great introduction to VXML with code samples.
http://www.w3.org/Voice/Guide/

XHTML+Voice Profile 1.0 (W3C Note)
XHTML+Voice profile is designed for Web clients that support visual and spoken interaction.
http://www.w3.org/TR/xhtml+voice/