From Wikipedia, the free encyclopedia

Wikidata is a collaboratively edited knowledge base operated by the Wikimedia Foundation. It is intended to provide a common source of certain data types (for example, birth dates) which can be used by Wikimedia projects such as Wikipedia.[1][2] This is similar to the way Wikimedia Commons provides storage for media files and access to those files for all Wikimedia projects. Wikidata is powered by the software Wikibase.


Wikidata screenshot
Three statements from Wikidata's item on the planet Mars. Values include links to other items and to Wikimedia Commons.
Wikidata screenshot
A layout of the four main components of a phase-1 Wikidata page: the label, description, aliases and interlanguage links.
Wikipedia screenshot
A Wikipedia article's list of interlanguage links as they appeared in an edit box (left) and on the article's page (right) prior to Wikidata. Each link in these lists is to an article that requires its own list of interlanguage links to the other articles; this is the information centralized by Wikidata.
Click here to visit the Wikidata entry for the article featured.
Wikidata screenshot
The "Edit links" link takes the reader to Wikidata to edit interlanguage links.

Wikidata is a document-oriented database, focused around items. Each item represents a topic (or an administrative page used to maintain Wikipedia) and is identified by a unique number, prefixed with the letter Q—for example, the item for the topic Politics is Q7163. This enables the basic information required to identify the topic the item covers to be translated without favouring any language.

Information is added to items by creating statements. Statements take the form of key-value pairs, with each statement consisting of a property (the key) and a value linked to the property.

This diagram shows the most important terms used in Wikidata

Development history[edit]

The creation of the project was funded by donations from the Allen Institute for Artificial Intelligence, the Gordon and Betty Moore Foundation, and Google, Inc., totaling 1.3 million.[3][4] Initial development of the project is being overseen by Wikimedia Deutschland and has been split into three phases:

  1. Centralising interlanguage links – links between Wikipedia articles about the same topic in different languages
  2. Providing a central place for infobox data for all Wikipedias
  3. Creating and updating list articles based on data in Wikidata

Phase 1[edit]

Wikidata was launched on 30 October 2012 and was the first new project of the Wikimedia Foundation since 2006.[1][5][6] At this time, only the first phase was available. This enabled items to be created and filled with basic information: a label – a name or title, aliases – alternative terms for the label, a description, and links to articles about the topic in all the various language editions of Wikipedia.

Initially, Wikidata was a self-contained repository of interlanguage links. No Wikipedia language editions were able to access Wikidata, so they needed to continue to maintain their own sets of interlanguage links. On 14 January 2013, the Hungarian Wikipedia became the first to enable the provision of interlanguage links via Wikidata.[7] This functionality was extended to the Hebrew and Italian Wikipedias on 30 January, to the English Wikipedia on 13 February and to all other Wikipedias on 6 March.[8][9][10][11] After no consensus was reached over a proposal to restrict the removal of language links from the English Wikipedia,[12] the power to delete them from the English Wikipedia was granted to automatic editors (bots).

Phase 2[edit]

The first aspects of the second phase were deployed on 4 February 2013, introducing statements to Wikidata entries. The values were initially limited to two data types (items and images on Wikimedia Commons), with more data types (such as coordinates and dates) to follow later. The first new type, string, was deployed on 6 March.[13]

The ability of the various language editions of Wikipedia to access data added to Wikidata as part of phase two was rolled out progressively between 27 March and 25 April 2013.[14][15]

Phase 3[edit]

Phase 3 will involve database querying and the creation of lists based on data stored on Wikidata.[citation needed]

See also[edit]

Wikidata's world.

Further reading[edit]


  1. ^ a b Wikidata (Archived at WebCite)
  2. ^ [Script error: No such module "Vorlage:Internetquelle". Script error: No such module "Vorlage:Internetquelle".] Wikimedia Deutschland, 30. März 2012, archiviert vom Original am 2012-09-11; abgerufen am 11. September 2012.
  3. ^ Lua error in package.lua at line 80: module 'Module:Citation/CS1/Suggestions' not found.
  4. ^ Lua error in package.lua at line 80: module 'Module:Citation/CS1/Suggestions' not found.
  5. ^ Lua error in package.lua at line 80: module 'Module:Citation/CS1/Suggestions' not found.
  6. ^ Lua error in package.lua at line 80: module 'Module:Citation/CS1/Suggestions' not found.
  7. ^ Pintscher, Lydia: Script error: No such module "Vorlage:Internetquelle". Wikimedia Deutschland, 14. Januar 2013, abgerufen am 15. Januar 2013.
  8. ^ Pintscher, Lydia: Script error: No such module "Vorlage:Internetquelle". Wikimedia Deutschland, abgerufen am 31. Januar 2013.
  9. ^ Pintscher, Lydia: Script error: No such module "Vorlage:Internetquelle". Wikimedia Deutschland, 13. Februar 2013, abgerufen am 15. Februar 2013.
  10. ^ Pintscher, Lydia: Script error: No such module "Vorlage:Internetquelle". Wikimedia Deutschland, 6. März 2013, abgerufen am 8. März 2013.
  11. ^ "Wikidata ist für alle Wikipedien da" (in German). Retrieved 29 January 2014.
  12. ^ Script error: No such module "Vorlage:Internetquelle". 29. März 2013, abgerufen am 30. März 2013.Vorlage:Cite web/temporär
  13. ^ Lydia Pintscher: Script error: No such module "Vorlage:Internetquelle". In: Script error: No such module "Vorlage:Internetquelle". Wikimedia Foundation, abgerufen am 3. März 2013.Vorlage:Cite web/temporär
  14. ^ Lydia Pintscher: Script error: No such module "Vorlage:Internetquelle". Wikimedia Deutschland, 27. März 2013, abgerufen am 28. März 2013.
  15. ^ "Wikidata goes live worldwide". The H. 2013-04-25. Archived from the original on 3 January 2014.

External links[edit]