Resource Description Framework
W3C standard for representing information as subject-predicate-object triples, forming the data layer of the Semantic Web and enabling structured knowledge exchange.
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Berners-Lee Proposes the Semantic Web
In 1999–2001, Tim Berners-Lee, director of the World Wide Web Consortium, outlined the Semantic Web vision, a machine-readable extension of the existing web in which data would carry explicit meaning, culminating in a widely cited May 2001 Scientific American article co-authored with James Hendler and Ora Lassila.