The Unix Radius attributes

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Freeradius ships with a dictionary file named dictionary.unix, that contains the following attributes:

VENDOR    Unix        4

BEGIN-VENDOR  Unix

ATTRIBUTE Unix-FTP-UID        10  integer
ATTRIBUTE Unix-FTP-GID        11  integer
ATTRIBUTE Unix-FTP-Home       12  string
ATTRIBUTE Unix-FTP-Shell        13  string
ATTRIBUTE Unix-FTP-Group-Names      14  string
ATTRIBUTE Unix-FTP-Group-Ids      15  string

END-VENDOR  Unix

Is the goal of this set of attributes to enable a Radius server to send back UID, GID, etc. information for a user that has been authenticated by the RADIUS server? If so, why use FTP in the name of the attributes? I mean, a Radius server will not be able to know whether the users being authenticated is accessing the target system via FTP, or some other service, right?