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Linked Data and the Semantic Web are about teaching computers the meanings of individual terms using what's called a URI as a unique identifier, and stating the relationships between terms as RDF triples. The specific connections among those relationships are defined in structured vocabularies called ontologies. Using the three elements of URIs, RDF triples, and ontologies, computers can then infer further relationships and connections beyond those explicitly stated. For example, in a genealogy context, I can state that my sister’s sister has a daughter is named “Alyssa”; a computer can then infer that Alyssa is my niece, and that I am Alyssa’s aunt.