ACTION

 Indicates the allowed I/O operations for the file connection.  It
 takes the following form:

 ACTION = act

 act  Is a character expression with one of the 
      following values:

 'READ'      Indicates that only READ statements can refer to 
             this connection.
 'WRITE'     Indicates that only WRITE, DELETE, and ENDFILE 
             statements can refer to this connection.
 'READWRITE' Indicates that READ, WRITE, DELETE, and ENDFILE 
             statements can refer to this connection (*DEFAULT*)