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the free knowledge base with 42,629,130 data items that anyone can edit.
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Wikidata acts as central storage for the structured data of its Wikimedia sister projects including Wikipedia, Wikivoyage, Wikisource, and others.
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item: Earth (Q2)
property: highest point (P610)
custom value: Mount Everest (Q513)
"What's in a name?" asked Shakespeare's Juliet.
The answer: a lot of rich data in need of structure and new properties. But thanks to growing user contributions and the work of a new WikiProject, Wikidata is getting better at supporting name-related data—and can tell you that Juliet also goes by Julika, and Giulia, and Hülya, and Liana, and Uljana...
Wikipedia – Encyclopedia Wiktionary – Dictionary and thesaurus Wikibooks – Textbooks, manuals, and cookbooks Wikinews – News Wikiquote – Collection of quotations Wikisource – Library Wikiversity – Learning materials and activities Wikivoyage – Travel guides Wikispecies – Directory of species Wikimedia Commons – Media repository Incubator – New language versions Meta-Wiki – Wikimedia project coordination MediaWiki – Software documentation