This document describes requirements for mechanisms that enable fine-grained control of speech (signal processing) resources and telephony resources in a VoiceXML telephony platform. The scope of these language features is for controlling resources in a platform on the network edge, not for building network-based call processing applications in a telephone switching system, or for controlling an entire telecom network.
Status of this Document
This section describes the status of this document at the time of its publication. Other documents may
This section outlines some of the capabilities required to support the scenarios described in the Introduction, and then describes the architectural model needed to make them easy to manipulate. There are a number of needed features that VoiceXML currently can't supply:
* Support for multi-party conferencing, plus more advanced conference and audio control. Any large conference application requires such features.
* Ability to give each active call leg its own dedicated VoiceXML interpreter. Currently, the second leg of a transferred call lacks a
[June 16, 2003] Updated W3C Working Draft for Call Control Extensible Markup Language (CCXML). The W3C Voice Browser Working Group has released an updated working draft specification for Voice Browser Call Control: CCXML Version 1.0. The CCXML specification defines declarative markup designed "to provide telephony call control support for VoiceXML or other dialog systems. CCXML is an adjunct language intended to complement and integrate with a VoiceXML system. The document contains references to VoiceXML's capabilities and limitations, and provides
Background
This Voice Browser PAG was announced on 15 Feb 2003. The PAG held its first meeting on March 14, 2003. The goals of the PAG, as stated in its charter were to consider 4 identified patent disclosures and
1. attempt to resolve concerns raised by the claims in the subject patents, and
2. advise the W3C Director on the probability that the above patent claims will in practice result in non-royalty-free licenses for essential claims for VoiceXML 2.0.
Process
The PAG made no substantive analysis of any of the identified patents. The