You can form namespace names from any printable character in the ISO Latin 1 set. However, the names cannot start with these characters: @ < > + [ ] - / = . , : ;
To use a string, enclose it in double quotes. To use a quote sign in the name, quote the sign too (for example, to use o'henry, type o"'"henry). To include white space (as in John Smith), use double quotes within single quotes, like this:
See "Host Names" for restrictions that apply to host names.