How does Wikidata work?
This wiki is the Wikidata repository. The repository is the central storage for the data that may be accessed by the client Wikis connected to the repository. By maintaining the data in the repository, content loaded dynamically from Wikidata does not need to be translated nor has to be kept up to date in each individual client Wiki. In addition, Wikidata has centralized all Wikipedia interlanguage links.
The Wikidata repository consists mainly of items, each outlined by a label, a description and likely one or more aliases. Sitelinks connect the articles of all client wikis while statements describe detailed characteristics of each Item. Each statement consists of a property and a value: You can link items of people to their place of birth, to their occupation or to its number of an authority control database, link a politician to his or her political party. You can give mountain peaks, places or buildings geographic coordinates, link an Item about a township to its next higher administrative unit, link a country to its highest representative, to its national anthem and so on. All this informations can be used in any language to display it in their own language even if all the information is taken from a different language. Even more, with accessing these values client wikis will always embed the most up-to-date data.