A FILE declaration associates a file identifier with a file and assigns values to the file attributes of the file.
<file declaration>
──┬──────────┬─ FILE ──────────────────────────────────────────────────►
└─ DIRECT ─┘
┌◄────────────────────────── , ─────────────────────────┐
►─┴─<identifier>─┬──────────────────────────────────────┬─┴────────────┤
└─ ( ──<attribute specifications>── ) ─┘
