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VoiceXML resources

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)

VoiceXML Forum

Publications and resources.

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.

Voice Extensible Markup Language (VXML) Version 2.0

Pointer to the latest 2.0 specification including new errata published by the W3C consortium.

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.

Speech Recognition Grammar Specification (SRGS) Version 1.0

The W3C specifications used by VXML to enable speech recognition

Speech Synthesis Markup Language (SSML) Version 1.0

The W3C specifications used by VXML to provide 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.

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.

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.

XHTML+Voice Profile 1.0 (W3C Note)

XHTML+Voice profile is designed for Web clients that support visual and spoken interaction.

Voice category at developer.com

Voice-technology related tutorials and articles including introduction to VXML, natural vs directed dialogs, SRGS and CCXML introductions

Ken Rehor's World of VoiceXML

An index of VXML resources and events maintained by Ken Rehor, the "principal founder of the VoiceXML Forum".