Syntax Notes
At least one of TD502, TD504, TD505, TD506 or TD512 is required.
If TD502 is present, then and TD503 is required.
If TD507 is present, then and TD508 is required.
If TD510 is present, then and TD511 is required.
If TD513 is present, then and TD512 is required.
If TD515 is present, then and TD512 is required.
If TD513 is present, then and TD512 is required.