UUID Guidelines

1. The UUID must contain only alphanumerical characters, the period (.), the at symbol (@), the underscore (_), and the dash (-). Unicode characters are not allowed. Try matching your UUID against this regular expression:

$ python
Python 2.7.2 (default, Jul  8 2011, 18:54:13) 
[GCC 4.6.1 20110627 (Red Hat 4.6.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> re.match('[-a-zA-Z0-9@._]+$', 'my-extension@mecheye.net')

2. Your extension must not end with gnome.org. Extensions are not affiliated with GNOME and must not appear to be.