Names of objects can be up to 255 characters long. Names can contain letters
(a–z and A–Z), digits (0–9), underscores (_), some special
characters ($,!,+,-, etc.), national characters, and blank spaces. Most names
can also contain UNICODE letters, for example, layers can include symbols in
their names.
Object names can not contain the following special characters:
Less-than and greater-than symbols (< >)
Forward slashes and backslashes (/ \)
Quotation marks (")
Colons (:)
Semicolons (;)
Question marks (?)
Commas (,)
Asterisks (*)
Vertical bars (|)
Equal signs (=)
Single quotes (`)
Special characters created with Unicode fonts
Note: Some objects can not contain blank spaces before and after the name.
Blank spaces are not recognized if they are leading or trailing symbols.