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from the Plum Voice IVR Glossary
The return element ends execution of a subdialog and returns control and data to a calling dialogue in a VoiceXML application. This element will incur error.semantic if it is encountered outside of a subdialog call. The namelist attribute indicates the variable names to be returned to the calling dialog. The default is to return no variables; this means that the caller will receive an empty ECMAScript object. An event attribute indicates to the application that it will return, and then throw the event. The eventexpr attribute specifies an ECMAScript expression that evaluates to the event being thrown to the application. The message element attribute allows the developer to include a descriptive message along with the event that is being thrown. The namelist attribute specifies a space-separated list of variables to send the subdialog back to the invoking application.
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