The namespace document for ws2 404s.

$ curl -I http://musicbrainz.org/ns/mmd-2.0#
HTTP/1.1 404 Not Found
Date: Sun, 27 May 2012 20:28:29 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Keep-Alive: timeout=20
Server: nginx/0.7.65
Set-Cookie: musicbrainz_server_session=b3d78bcb1d52b1e72b5d9fa1ca523ac6c79229c3; path=/; expires=Sun, 27-May-2012 22:28:29 GMT; HttpOnly
Set-Cookie: javascript=false; path=/