The World Wide Web Consortium (W3C) announced on Tuesday completion of two standards for voice-driven Web applications.VoiceXML 2.1 standardizes practices that aid in voice VoiceXML interoperability and gives developers clarity in developing new features, W3C said. It uses the VoiceXML 2.0 dialog language to include commonly implemented features such as dynamic references to grammars and scripts, detection of when a user barges in during a prompt and processing multiple sets of data from the server in a single access. VoiceXML 2.0 applications will work under version 2.1 without modification.The other standard, Semantic Interpretation for Speech Recognition (SISR) 1.0, improves the voice-to-markup conversion for better performance in voice recognition systems. It enables developers to extract and translate textual representations of words recognized by a speech recognition system and structure results into a format convenient for processing by the speech application. The W3C Voice Browser Working Group, featuring representatives from organizations such as HP, IBM and the Chinese Academy of Sciences, completed work on both standards. Both standards are part of the W3C Speech Interface Framework, which is still in development. Software Development