Moin!

"History mechanisms and caches are different. In particular history mechanisms SHOULD NOT try to show a semantically transparent view of the current state of a resource. Rather, a history mechanism is meant to show exactly what the user saw at the time when the resource was retrieved."
(Quelle: RFC 2068, Abschnitt 13.13. "History Lists")

Die RFC 2068 ist mittlerweile obsolet, aber die an ihre Stelle getretene RFC 2616 enthält das Zitat (und den restlichen Text zu diesem Thema) immer noch.

- Sven Rautenberg