13.5.31 WRITE Specifier

The WRITE specifier asks whether a file can be written to. It takes the following form:

WRITE = wr

wr
Is a scalar default character variable that is assigned one of the following values:

'YES'	If the file can be written to
'NO'	If the file cannot be written to
'UNKNOWN'	If the processor cannot determine whether the file can be written to