Wikidata is a free knowledge base that can be read and edited by humans and machines alike. It centralizes storage and management of Wikipedias structured data and provides access to it in various open formats. It is powered by the Wikibase software, which is build on top of the MediaWiki platform.
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Wikibase, the Software behind Wikidata
Introduction to the Wikibase software, including the data model, high level features and architecture. Created for SMWCon Fall 2014, Vienna.