ange-ftp-file-name-as-directory-alist

ange-ftp-file-name-as-directory-alist is a variable defined in `ange-ftp.el'.
Its value is

((vms . ange-ftp-vms-file-name-as-directory))

Documentation:
Association list of (TYPE . FUNC) pairs.
FUNC converts a filename to a directory name for the operating
system TYPE.