VoiceXML with Visual Studio

Posted by The World According to Marc on February 22, 2007

Every so often I’m surprised by the incredible flexibility built into Visual Studio 2005. I’ve been writing a lot of VoiceXML lately and I was really missing the intellisense that I’ve become so used to. On a whim I tried opening a VoiceXML document in Visual Studio and much to my surprise it worked! It turns out that Visual Studio is capable of understanding the syntax of a document based on it’s DOCTYPE. In my case it saw <!DOCTYPE vxml PUBLIC “-//W3C//DTD VOICEXML 2.1//EN” “<a href=”http://www.w3.org/TR/voicexml21/vxml.dtd”“>http://www.w3.org/TR/voicexml21/vxml.dtd”</a>> and was able to automatically give me basic intellisense and syntax checking for VoiceXML version 2.1. As an example, create a new XML document and insert the following:

<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE vxml PUBLIC "-//W3C//DTD VOICEXML 2.1//EN" "<a href="http://www.w3.org/TR/voicexml21/vxml.dtd"">http://www.w3.org/TR/voicexml21/vxml.dtd"</a>> <vxml version="2.1">
</vxml>

You’ll notice that the last element (</vxml>) gives you a warning. Hovering over it tells you not only that your missing an element but what the valid elements might be! This is all very cool if you ask me…