derived web

Legally, a derived web is a linked corpus of text that includes a namespace, and has been derived (in the legal sense of a derived work or prior art) from some previous work.

In open content this is often called a "fork" and the creation of the derived web is called to "fork off".

A derived design presents very different legal issues and so should be discussed as an entirely separate thing. To share the linked corpus, as is required by terms of use of all open content wikis, is not at all the same thing as to copy design elements - which may be under a wholly different copyright.

It is also not the same thing as as a derived service, which uses a web API or RSS or live XML import or any other such facility from a web service on a frequent basis, e.g. as Wikinfo relies on Wikipedia.