If you were looking for www.example.com, then you are wrong here. This is not it. This is www.exаmple.com. Do not confuse the two.
This is an example of a website. It is not the aforementioned canonical example, but it is certainly more colorful, and may be used instead.
You can contact the author for exаmple by writing an email (alternative version).
You may proceed hence to a write-up about SGML, which contains a long, boring narrative, three very useful tables and a collection of deluxe links. The same person also collected random pieces of random information about some SGML constructs.