open
Entity: function

close
Entity: predicate

Usage:
FILE is open(FileName, Mode)
close(FILE)

Opens/closes a file
close can be used to close a file or OLE server or a socket or MYSQL connection

FILE | variable to accept file handle
FileName | file name with the path
Mode | the mode can be: "w" - writing (erases the old file), "w+"- writing (over the old file), "r" - reading, "r+"- reading and writing, "a" - appending (creates a new file if it does not exist), "a+"- appending (the file must exist), "b" - binary (cannot be used alone, add it on the end like "rb")

See also:

select_file
get
put