MVS naming conventions

Restrictions: MVS™ data set names used with all FTP commands sent to the z/OS UNIX FTP server must meet MVS data set naming conventions as follows:

Data set names cannot be longer than 44 characters.
If the path name parameter sent with an FTP command is not enclosed in single quotation marks, the path name is appended to the current working directory to create the data set name. The combination of the current working directory and the path name cannot be longer than 44 characters. Issue the PWD command to display the current working directory.
Each qualifier in a data set name, or each member name for a partitioned data set, must conform to the following:
- No longer than 8 characters.
- Begin with a letter or the special characters
```
$, @, or #.
```
- Contain only numbers, letters, or the special characters
```
$, @, #, -, or }.
```
Generation data group data set names must be in the format gdg_name(generation_level). The generation_level is either 0, +nn, or -nn, where nn is the generation number. For example, the GDG data set MYGDG could be specified as MYGDG(0) for the current generation level, MYGDG(-1) for the next to the latest generation level, or MYGDG(+1) for the new generation level.