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Resource Description Framework

RDF 1.1 Concepts and Abstract Syntax
Status Published, W3C Recommendation
Year started 1997
Editors Richard Cyganiak, David Wood, Markus Lanthaler
Base standards URI
Related standards RDFS, OWL, RIF, RDFa
Domain Semantic Web
Abbreviation RDF
Website www.w3.org/TR/2014/REC-rdf11-concepts-20140225/
RDF 1.1 Turtle serialization
Filename extension .ttl
Internet media type text/turtle
Developed by World Wide Web Consortium
Standard RDF 1.1 Turtle: Terse RDF Triple Language January 9, 2014; 3 years ago (2014-01-09)
Open format? Yes
RDF/XML serialization
XML.svg
Filename extension .rdf
Internet media type application/rdf+xml
Developed by World Wide Web Consortium
Standard Concepts and Abstract Syntax February 10, 2004; 12 years ago (2004-02-10)
Open format? Yes

The Resource Description Framework (RDF) is a family of World Wide Web Consortium (W3C) specifications originally designed as a metadata data model. It has come to be used as a general method for conceptual description or modeling of information that is implemented in web resources, using a variety of syntax notations and data serialization formats. It is also used in knowledge management applications.

RDF was adopted as a W3C recommendation in 1999. The RDF 1.0 specification was published in 2004, the RDF 1.1 specification in 2014.

The RDF data model is similar to classical conceptual modeling approaches (such as entity–relationship or class diagrams). It is based upon the idea of making statements about resources (in particular web resources) expressions, known as triples. Triples are so named because they follow a subjectpredicateobject structure. The subject denotes the resource, and the predicate denotes traits or aspects of the resource, and expresses a relationship between the subject and the object.

For example, one way to represent the notion "The sky has the color blue" in RDF is as the triple: a subject denoting "the sky", a predicate denoting "has the color", and an object denoting "blue". Therefore, RDF swaps object for subject in contrast to the typical approach of an entity–attribute–value model in object-oriented design: entity (sky), attribute (color), and value (blue).


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