Editing Wikidata

'''[[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. 

Wikibase allows [[interwiki]] links to be managed with Wikidata removing much contributor annoyanges, redundancy and error-proneness.

Wikidata is obviously a main source of [[reference]] level data once it is technically possible for non-WMF wikis to access the data items.

It can be accessed outside of WMF wikis with with 
* [[wikidata:Wikidata:SPARQL_query_service/queries|Wikidata advice on how to query]] [https://query.wikidata.org/ Wikidata's endpoint] using [[SPARQL]].
* [[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]
* [[wikidata:Wikidata:Database download|Wikidata offers its database for download]]

Main entry point of any Wikidata item is a [[w:JSON|JSON]] dictionary, that has this form:

<code>{“labels”: by-language dictionary

“descriptions”: by-language dictionary

“aliases”: by-language dictionary

“claims”: list of property and values

“sitelinks”: by-language dictionary}</code>

== Useful information ==

* [[wikidata:Wikidata:Tools/External_tools|Wikidata's list of external tools that make use of Wikidata's knowledge]]

'''More info''' 
* [[m:Wikidata|Metawiki on Wikidata]]
* [[w:Wikipedia:Wikidata|Wikipedia advice on Wikidata issues]] 

== See also ==
* [[Database]] for a higher level view of what is going on with the databases
* [[Semantic MediaWiki]] is system for inputting and querying semantic data within the MediaWiki and it is implemented as extension(s).
* [[DBpedia]] the original structured data harvesting effort for the MediaWiki wikis