Intel® Fortran Compiler 17.0 Developer Guide and Reference
The POSITION specifier asks the position of the file. It takes the following form:
POSITION = pos
pos
Is a scalar default character variable that is assigned one of the following values:
'REWIND'
If the file is connected with its position at its initial point
'APPEND'
If the file is connected with its position at its terminal point (or before its end-of-file record, if any)
'ASIS'
If the file is connected without changing its position
'UNDEFINED'
If the file is not connected, or is connected for direct access data transfer and a REWIND statement has not been performed on the unit