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'''[[w:Wikidata|Wikidata]]''' [http://wikidata.org (.org)] is a [[w:knowledge base|knowledge base]], an effort to store and serve structured data to [[Wikimedia]] wikis and to a more limited extent to other parties. Wikidata effort saw the daylight in [[2012]]. | '''[[w:Wikidata|Wikidata]]''' [http://wikidata.org (.org)] is a [[w:knowledge base|knowledge base]], an effort to store and serve structured data to [[Wikimedia]] wikis and to a more limited extent to other parties. Wikidata effort saw the daylight in [[2012]]. | ||
The underlying software is the '''[[Wikibase]]''' which consists of 2 [[Mediawiki]] extensions, the repository extension and the client extension. | The underlying software is the '''[[#Wikibase|Wikibase]]''' which consists of 2 [[Mediawiki]] extensions, the repository extension and the client extension. | ||
Wikibase allows [[interwiki]] links to be managed with Wikidata removing much contributor annoyanges, redundancy and error-proneness. | Wikibase allows [[interwiki]] links to be managed with Wikidata removing much contributor annoyanges, redundancy and error-proneness. | ||
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It can be accessed outside of WMF wikis with with | It can be accessed outside of WMF wikis with with | ||
* | * [https://query.wikidata.org/ Wikidata's SPARQL endpoint] using [[SPARQL]] ([[wikidata:Wikidata:SPARQL_query_service/queries|Wikidata advice on how to query]]). | ||
* [[mw:Wikidata Toolkit]] is a way for Java programs to access data in the Wikidata repository. | * [[mw:Wikidata Toolkit]] is a way for Java programs to access data in the Wikidata repository. | ||
* [https://rdflib.github.io/sparqlwrapper/ SPARQL Endpoint interface to Python] | * [https://rdflib.github.io/sparqlwrapper/ SPARQL Endpoint interface to Python] | ||
* [[wikidata:Wikidata:Database download|Wikidata | * [[wikidata:Wikidata:Database download|Wikidata database download]] | ||
Main entry point of any Wikidata item is a [[w:JSON|JSON]] dictionary, that has this form: | Main entry point of any Wikidata item is a [[w:JSON|JSON]] dictionary, that has this form: | ||
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:# [[mw:Extension:Wikibase Client|Wikibase Client]] that allows a wiki to access structured data from a repository. The client can work only with repository databases it can access so they must be on the same machine or the same load balancer. | :# [[mw:Extension:Wikibase Client|Wikibase Client]] that allows a wiki to access structured data from a repository. The client can work only with repository databases it can access so they must be on the same machine or the same load balancer. | ||
=== Installation === | === Installation of Wikibase === | ||
[[mw:Wikibase/Installation|Wikibase installation instructions at Mediawiki.org]] and [[mw:Wikibase/Installation/Advanced_configuration|advanced configuration of Wikibase]]. | [[mw:Wikibase/Installation|Wikibase installation instructions at Mediawiki.org]] and [[mw:Wikibase/Installation/Advanced_configuration|advanced configuration of Wikibase]]. | ||
The installation instructions assume you are installing the dependencies with [[mw:Composer|Composer]], a PHP package manager that makes the installation of dependencies easy. | The installation instructions assume you are installing the dependencies with [[mw:Composer|Composer]], a PHP package manager that makes the installation of dependencies easy. | ||
=== | === Useful extensions in conjunction with Wikibase === | ||
* [[mw:Extension:ArticlePlaceholder]] makes article placeholders from repository data and invites users to create the article. | * [[mw:Extension:ArticlePlaceholder]] makes article placeholders from repository data and invites users to create the article. | ||
* [[mw:Extension:UniversalLanguageSelector]] is recommended to work in conjunction with Wikibase for user comfort. | * [[mw:Extension:UniversalLanguageSelector]] is recommended to work in conjunction with Wikibase for user comfort. | ||