Wikidata – Free Open Knowledge Base

web

Credibility Rating

3/5

Good(3)

Good quality. Reputable source with community review or editorial standards, but less rigorous than peer-reviewed venues.

Rating inherited from publication venue: Wikidata

Wikidata is a general-purpose structured knowledge base occasionally used in AI safety research for knowledge graph benchmarks, entity disambiguation, and as a reference ontology for evaluating language model factual accuracy.

Metadata

Importance: 35/100wiki pagedataset

Summary

Wikidata is a free, collaboratively edited knowledge base maintained by the Wikimedia Foundation, storing structured data for Wikipedia and other Wikimedia projects. It contains over 120 million data entities accessible to both humans and machines via open APIs and SPARQL queries. Its open, machine-readable format makes it a foundational resource for knowledge graphs, AI training data, and linked open data research.

Key Points

•Contains 120+ million structured data entities freely available under a CC0 public domain license
•Serves as the central structured data backend for Wikipedia, Wikivoyage, Wiktionary, and other Wikimedia projects
•Supports SPARQL query interface enabling complex, machine-readable knowledge graph queries
•Widely used as a training and evaluation dataset for AI/NLP systems and knowledge representation research
•Open contribution model allows individuals and organizations to donate and edit structured data

Cited by 1 page

Page	Type	Quality
AI Knowledge Monopoly	Risk	50.0

Cached Content Preview

HTTP 200Fetched Apr 9, 20266 KB

Wikidata 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Jump to content 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 From Wikidata 
 
 
 
 
 
 
 
 Welcome to Wikidata 

 
the free knowledge base with 121,166,372  data  entities that anyone can edit .

 
 Introduction • Project Chat • Community Portal • Help 

 
 Want to help translate? Translate the missing messages . 

 
 
 
 

 Welcome! 
 Wikidata is a free and open knowledge base that can be read and edited by both humans and machines.

 Wikidata acts as central storage for the structured data of its Wikimedia sister projects including Wikipedia, Wikivoyage, Wiktionary, Wikisource, and others.

 Wikidata also provides support to many other sites and services beyond just Wikimedia projects! The content of Wikidata is available under a free license , exported using standard formats , and can be interlinked to other open data sets on the linked data web.

 
 
 
 Get involved For a complete starters’ guide, visit the community portal . 
 Learn about Wikidata 

 What is Wikidata? Read the Wikidata introduction .

 Explore Wikidata by looking at a featured showcase item for author Douglas Adams (Q42) .

 Get started with Wikidata's SPARQL query service .
 
 Contribute to Wikidata 

 Learn to edit Wikidata: follow the tutorials .

 Work with other volunteers on a subject that interests you: join a WikiProject .

 Individuals and organizations can also donate data .
 
 Meet the Wikidata community 

 Visit the community portal or attend a Wikidata event .

 Create a user account .

 Talk and ask questions on the Project chat , Telegram groups , or the live IRC chat connect .
 
 Use data from Wikidata 

 Learn how you can retrieve and use data from Wikidata .
 
 More... 
 
 
 News 
 2025-11-12: Temporary accounts were deployed on Wikidata. From now on unregistered editors will get a temporary account automatically assigned to them, instead of being identified by their IP addresses.

 WikidataCon 2025 , Oct 31 - Nov 2.
Join us for 3 days of presentations, discussions, workshops, lightning talks and games; all powered or helping power Wikidata!
 
 Register here for the access link.

 Check the schedule: on Pretalx & on-wiki .
 
 Wikidata's 13th Birthday🎉! Join us online, October 29 17:00 UTC ( in your timezone ) for presents, birthday messages, games...and a 📣surprise announcement (don't miss it!). 🎁 Add your own gifts to the list - anything that celebrates Wikidata and its amazing community... a script you’ve written, tool improvement, visual, poem...the sky's the limit. Get the call link here: 13th Birthday Presents & Messages call .

 2025-10-15: The Wikidata development team held the Q4 Wikidata+Wikibase office hour for 2025. They presented their work from the past quarter and discussed what's coming next. Session log is available.

 2025-06-19: Search by entity type goes live. The new Wikidata Search box is typeahead compatible and searches can be limited to o

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Resource ID: 68df298e30be1cf5 | Stable ID: sid_AzpQGK8XQg