Nodes and Palette Options > Detailed Palette Option Descriptions > Expression
	Expression

Used to embed an ECMA script expression within a prompt. This can be used for playing event details or other ECMA script values.

For example, when a prompt is played in an Event handler, the prompt may use the Expression element to play "_message" (the event message).

Using Expression elements in a prompt requires knowledge of the valid ECMA script objects in a VXML document. The value of the Expression property is literally embedded in the generated VXML, so if the Expression is invalid, there may be VXML parse or semantic errors.

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