### 7.1.1.5 Namelist Specifier

The namelist specifier indicates namelist I/O. It identifies the group-name of the list of entities that can be modified on input or written on output.

The namelist specifier takes the following form:

    [NML=]group-name

group-name
  Is the name of a list previously defined in a NAMELIST statement.

The keyword NML is optional if the following conditions are true:

- The first parameter is a logical unit specifier without an optional UNIT keyword.

- The namelist specifier is the second parameter in the control list.

A namelist specifier cannot be used in a statement that contains a format specifier.

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