November 28, 2021

Wikidata is a knowledge base collaboratively edited and hosted by the Wikimedia Foundation. It is intended to provide a common source of data that can be used by Wikimedia projects such as Wikipedia, [1] [2] and by anyone else, under a public domain license. This is similar to the way that Wikimedia Commons provides storage for and access to multimedia files for all Wikimedia projects. Wikidata works and operates with the Wikibase software. [3]


Wikidata is a documentary database, focused on elements. Each element represents a term (or an administrative page used to maintain Wikipedia) and is identified by a unique number, prefixed with Q (for example, the identifier for "Encyclopedia" is "Q5292"), known as "QID". This allows the basic information required to identify the term that the item covers to be translated without favoring any language. An element can have one or more declarations. Information is added to items by creating declarations, in the form of key-value pairs, and each declaration consists of a property (the key) and a value linked to the property.

Development history

Wikidata was launched on October 30, 2012 and was the Wikimedia Foundation's first new project since 2006. [1] [4] [5] The project was funded by grants from the Allen Institute for Artificial Intelligence, [6] the Gordon and Betty Moore Foundation [7] and Google Inc., totaling € 1.3 million. [8] [ 9] The initial development of the project is being supervised by Wikimedia Deutschland, and has been divided into three phases: [10] Centralize interlinguistic links - links between articles on the same topic in different languages. Provide a central place for information on the factsheets for all Wikipedias. Create and update article lists based on Wikidata data.

Phase 1

The first phase was launched on October 30, 2012. This enabled elements to be created and they could be filled in with basic information; a tag (a name or title), an alias (an alternative name to the tag), a description, and cross-language links for Wikipedia articles. On January 14, 2013, the Hungarian Wikipedia was the first Wikipedia to use Wikidata interlinguistic links. [11] This functionality was later extended to the Hebrew and Italian versions on January 30 [12] and to the English version. on February 11. [12] [13] The change affects the rest of Wikipedias since March 6, 2013. [14]

Phase 2

The first aspects of the second phase began on February 4, 2013, introducing key and value pairs for Wikipedia entries. [13] Values ​​were initially limited to two types of data (elements and images in Wikimedia Commons), with more data types (like coordinates and dates) to go on later. The first new type, chain, was implemented on March 6. [15] On March 27, 2013, the second phase began to function in 11 Wikipedias, [16] then on April 22 it was included in English Wikipedia [17] and on April 24, 2013, it was extended to the others Wikipedias, thus being able to include data from Wikidata, in those Wikipedia entries (regardless of the language) in whose corresponding contents that information will be found omitted. [18]

Phase 3

Phase 3 will include querying the database and creating lists based on data stored in Wikidata. [10] As of October 2016, two tools for querying Wikidata (Wikidata: Query List) were available: AutoList [ 19] and PetScan, [20] plus a public SPARQL endpoint. [21]


There is concern that the project is being

INSERT INTO `wiki_article`(`id`, `article_id`, `title`, `article`, `img_url`) VALUES ('NULL()','Wikidata','','There is concern that the project is being','')