Walled garden

A walled garden, with regards to content, refers to an exclusive set of information services provided for users. This is in contrast to consumers going to the open Internet for content and e-commerce. The term is often used to describe offerings from interactive television providers or mobile phone operators which provide custom content, and not simply common carrier functions.

Some examples of walled gardens include:

America Online. AOL has revenue sharing agreements with certain information providers in their subscriber-only space.
NTT DoCoMo i-mode. The interactive mobile phone content portal signs on content partners and shares revenue from each kilobyte transferred.
Full Service Network. A pilot project from Time Warner, this was an early interactive television system that provided residents of Orlando, Florida, access to online shopping, grocery order and US Mail Service.

Wiki

Within a wiki culture, a walled garden is a set of pages within a wiki that are intended for the private use of an individual, or group. Some wikis do not permit users to set up such walled gardens, and the wiki community will make efforts to dissuade such behaviour.

Users who want to create their own space in wikis should try one of the following:

set up their own wiki on their own server, or
use a wiki farm, or
investigate wiki hosting