[FIG(quote)[
[FIGCAPTION[
[1] [CITE@en[RFC 959 - File Transfer Protocol]]
( ([TIME[2016-06-05 16:18:06 +09:00]]))
<https://tools.ietf.org/html/rfc959#page-5>
]FIGCAPTION]

>       pathname
>          Pathname is defined to be the character string which must be
>          input to a file system by a user in order to identify a file.
>          Pathname normally contains device and/or directory names, and
>          file name specification.  FTP does not yet specify a standard
>          pathname convention.  Each user must follow the file naming
>          conventions of the file systems involved in the transfer.

]FIG]