The namelist specifier indicates namelist formatting and identifies the namelist group for data transfer. It takes the following form:
If the keyword NML is omitted, the namelist specifier must be the second specifier in the control list; the io-unit specifier must be first.
If a namelist specifier appears in a control list, a format specifier must not appear.
For More Information:
For details on namelist input, see Section 10.3.1.3; output, see Section 10.5.1.3.