List of available attributes for http://axschema.org and http://schemas.openid.net

Question

I have searched high, low, far and wide but can not find anything on the Internet that lists the available attributes for these schemas. Does anyone know where the documentation is for these? so far I know of:

http://axschema.org/namePerson/first

http://axschema.org/namePerson/last

http://axschema.org/contact/email

http://schemas.openid.net/ax/api/user_id