Foren / National / Russian / Cotonti 0.0.3 beta 2

Почему недокументированное? Любой браузер распознает # как начало страницы. Это известно со времен начала HTML.

RFC 1630, June 1994:
The fragment-id follows the URL of the whole object from which it is
separated by a hash sign (#). If the fragment-id is void, the hash
sign may be omitted: A void fragment-id with or without the hash sign
means that the URL refers to the whole object.