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RDF

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RDF

(1) See reality distortion field.

(2) (Resource Description Framework) The data model that describes the interrelationships between elements in some sphere of knowledge. All the linked vocabularies that make up the Semantic Web use the RDF model, which forms a graph of the connections. The data elements are identified by URIs, text or numbers, and the fundamental RDF structure is the "Triple." See URI.

Theoretical RDF Triple Examples

  noun - Subject:    Pat
  verb - Predicate:  is president of
  noun - Object:     XYZ Company

  noun - Subject:    XYZ Company
  verb - Predicate:  is located in
  noun - Object:     Arizona

Formal Languages Define Ontologies
Two languages are used to define the meaning of the vocabularies graphed in the RDF model: the basic RDF Schema (RDFS) and the more comprehensive Web Ontology Language (OWL). See RDFS, OWL and ontology.

RDF Serializations
The RDF model identifies the elements, but the actual text format, called a "serialization" is written in RDF/XML (required for publishing and sharing) or some other syntax such as N3, Turtle, JSON-LD or RDFa. See Semantic Web, Turtle, JSON-LD and RDFa.

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References in periodicals archive

Neste sistema, pode-se utilizar os esquemas de dados estruturados em XML, RDF, RDF Schema e as ontologias construidas em OWL, com relacoes explicitas capazes de possibilitar que um sistema computacional identifique os relacionamentos entre os dados e as necessidades dos usuarios.

Semantic Web Technologies in Information Architecture/Tecnologias da Web Semantica na arquitetura da informacao/ Tecnologias de la Web Semantica en arquitectura de la informacion

predicate, object) in an RDF graph T The size of T, [absolute value of T], is the number of RDF triples in T An RDF graph is simple if it does not use vocabulary with a predefined semantics in RDF Schema (RDFS).

Hipergrafos dirigidos para documentos RDF

Sesame: a generic architecture for storing and querying RDF and RDF schema. The Semantic Web--ISWC 2002, 54-68.

Maintaining enterprise knowledge with a REA-EO driven semantic wiki

* RDF Schema is a vocabulary for describing properties and classes of RDF resources, with a semantics for generalization-hierarchics of such properties and classes.

What is the Semantic Web?

It is compatible with RDF Schema (RDFS) and includes precise semantics for describing term meanings (and thus also for describing implied information).

Reusing educational material for teaching and learning: current approaches and directions

RDF Schema then provides a way for those descriptions to be combined into a single vocabulary.

W3C issues RDF and OWL recommendations

The key components of semantic web technology for representing knowledge are usually classified into three main categories: The Resource Description Format (RDF), RDF Schema and The Ontology Web Language (OWL) Standard.

A survey on approaches, methodologies, standards, and tools for ontologies

* RDF Schema (9), y OWL (10) para describir conceptos del vocabulario.

Marco de trabajo para la integracion de recursos digitales basado en un enfoque de web semantica

As a domain modeling tool, ontology languages such as RDF (Resource Description Framework), RDFS (RDF Schema), and OWL Web Ontology Language of the Semantic Web standards describe the common vocabularies and their relationships within the framework.

Semantic reasoning with contextual ontologies on sensor cloud environment

The third layer is ontology vocabulary that is rapidly becoming a reality through the development of ontology markup languages such as RDF, RDF Schema, DAML+OIL, and OWL (Web Ontology Language) (Smith, Welty et al.

Intelligent discovery for learning objects using semantic web technologies