VoiceXML
is an standard to create voice activated applications which are basically
xml applications. As with other xml applications these also have different
xml tags that are specific to the interaction between the user and the
server in speech. A DTD is present to validate the voice xml document.
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Any
voice xml document starts with an <vxml> tag. The other tags like
<menu>, <form>, <var>, <prompt>, <audio>,
<choice>, <default> etc are available within the <vxml>
tag to form the xml application. There are lots of tutorials available
in the internet that gives you examples on working with these tags.
For example
the <prompt> tag will prompt the user to tell something to the
server with some audio. The following code prompts the user with an
audio message.
<prompt>
<audio>Welcome to the voice Interactive system. Say Mail to go
to the voice mail box.</audio>
</prompt>
The <choice>
element is used to redirect the user to a particular choice based on
their response. The default tag can be used to redirect the user to
the same prompt dialog if he says something else that is not available
in the choice.
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