FORMAT Phrase
Required if there is more than one record format for the file.
The value specified in the FORMAT phrase contains the name of the record format to use for this I-O operation. The system uses this to specify or select which record format to operate on.
Identifier-2, if specified, must be an alphanumeric data item of 10 characters or less.
Literal-1, if specified, must be an uppercase character-string of 10 characters or less.
A value of all blanks is treated as though the FORMAT phrase were not specified. If the value is not valid for the file, a FILE STATUS of 9K is returned and a USE procedure is invoked, if applicable for the file.