The link you have just followed is an old one, pointing to
a "info.cern.ch". All documents originally maintained by
CERN
on info.cern.ch are now maintained on "www.w3.org" by the
W3 Consortium.
If you have troubles accessing www.w3.org then mail webmaster@w3.org
For now, you can jump on to the
document in its new home
but this forwarding message will not be maintained indefinitely.