Using _FTPXLATE_name for translation

In your FTP.DATA file, you can use the CCXLATE or XLATE statements to specify a name that corresponds to a particular data set that is to be used for the initial translate tables for the control or data connections.

Rules:
FTP searches for an environment variable defined as _FTPXLATE_name=fully_qualified_dsn with the following specifications:
name
The XLATE or CCXLATE parameter value you coded in FTP.DATA. You can code 1 to 8 alphabetic or numeric characters.
fully_qualified_dsn
A fully qualified MVS™ data set name or z/OS® UNIX file name.
Requirements:
FTP identifies the data set corresponding to the name value:

You can also issue the SITE XLATE= command from any client to set the translate tables for the data connection for that particular FTP session. The FTP server searches for an environment variable called _FTPXLATE_name and uses the data set name that _FTPXLATE_name defines. If the _FTPXLATE_name environment variable does not exist, the server searches for a data set called hlq.name.TCPXLBIN.