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Definition: Schema.org

An initiative of the Google, Bing, Yahoo! and Russia-based Yandex search engines to define a common vocabulary for identifying data on Web pages. Launched in 2011, Schema.org provides thousands of data descriptions for the things and actions in the world and endorses the Microdata, RDFa and JSON-LD syntaxes. See Semantic Web, Microdata, RDFa and JSON-LD.