Fundamental rules for for Universal Naming Convention (UNC),which enable applications to create and process valid names for files and directories, regardless of the file system:

Following reserved characters:
```
< (less than)
> (greater than)
: (colon)
" (double quote)
/ (forward slash)
\ (backslash)
| (vertical bar or pipe)
? (question mark)
* (asterisk)
```
Use any character in the current code page for a name, including Unicode characters and characters in the extended character set (128–255),