TPT SCHEMA MAPPER OPERATOR example please

Hello All,
I can't find an example anywhere of the TPT Schema Mapper Operator in Action.  Could someone please post an example.
The $SCHEMAP.txt template file in the TPT Install directory has the following in the comments:
......             the "Schema Mapper Operator" chapter   */
/*               in the Teradata Parallel Transporter User Guide,    */
/*               for a discussion and examples of using its key      */
/*               attributes. 
There is no such chapter.   How is it "Applied" ?
Thanks