Reference 
This section provides you detailed information on the following topics:
Provides information on where you can create, delete, rename the variables in a voice model.
Working With Formal Parameters
Provides information on data exchange that happens between a voice component and a voice application through formal parameters.
Provides the description of all the fields of the entity fields in a voice model.
URL Parameters of a Voice Application
Provides information on the URL parameters and values that you can append to a voice application URL.
Provides information on some of the books that provide pointers on voice application implementation