The Prompt Class
Instances of the Prompt class represent audio data that can be played back to a caller. A Prompt object has a constant (unchanging) value. Complex prompt literals are references to instances of class Prompt.
The prompt concatenation operator +, the prompt escalation, time of day prompt, time of week prompt, day of week prompt, and random prompt operators ||, and the prompt substitution operator |||implicitly create a new Prompt object.