The Resource Description Framework (RDF) is a World Wide Web Consortium (W3C) standard originally designed as a data model for metadata. RDF presents resource statements in a machine-readable form. RDF is part of the concept of the semantic web.
A resource in RDF can be any entity, either informational (such as a website or an image) or non-informational (such as a person, a city or some abstract concept). A statement made about a resource is of the subject-predicate-object form and is called a triplet. The statement “the sky is blue” in RDF terminology can be represented as follows: subject – “sky”, predicate – “has colour”, object – “blue”. URIs are used to denote subjects, relations and objects in RDF.
Products: DBpedia, GeoNames, WordNet.
Digital platforms: Cross-platform software
The use of RDF has increased with the advent of RDF representation in the form of JSON-LD and the spread of Linked Data. For example, Google takes a semantic page description in one RDF format (and using the Schema.org dictionary) and uses it to describe search results in more detail.