A city is a used as a knowledge base and social network for a specific geographical locale. The term 'city wiki' or its foreign language equivalent is sometimes also used for that cover not just a city, but a small town or an entire region. A city contains information about specific instances of things, ideas, people and places. Much of this information might not be appropriate for Wikipedia (e.g., articles on every retail outlet in a town), but might be appropriate for a wiki with more localized content and viewers. A city wiki could also contain information about the following subjects, that may or may not be appropriate for a general knowledge wiki, such as:
Details of public establishments such as public houses, bars, accommodation or social centers.
Owner name, opening hours and statistics for a specific shop.
Statistical information about a specific road in a city.
Flavors of ice cream served at a local ice cream parlor.
A biography of a local mayor and other persons
The Open Guide to London is probably the oldest of the city wikis. It is part of a sub group of city wikis that use the OpenGuides software, and most have the openguides.org domain in their URL. Most of them are for cities in England. Although Cityultima, formerly Cityunlimited was founded in February 2007. The Stadtwiki Karlsruhe is the largest city .