[Attribute Name] type [Details] 
An OPTIONAL ECMAScript expression which returns a character string that specifies the MIME type of the document, and as a result, determines which dialog manager environment is actually used. A MIME type of "application/xml+vxml" requests a VoiceXML interpreter instance. A MIME type of "audio/wav" requests a dialog manager that merely plays wave files. If omitted, the type attribute defaults to "application/xml+vxml".