RDF$501042$ - translation to dutch
![The RDF antenna on this B-17F is located in the prominent teardrop housing under the nose.](https://commons.wikimedia.org/wiki/Special:FilePath/B-17F "Tom Paine" of the 388th Bomb Group, WW2.jpg?width=200 "The RDF antenna on this B-17F is located in the prominent teardrop housing under the nose.")
![[[Amelia Earhart]]'s [[Lockheed Model 10 Electra]] with the circular ''RDF'' aerial visible above the cockpit](https://commons.wikimedia.org/wiki/Special:FilePath/Earhart-electra 10.jpg?width=200 "[[Amelia Earhart]]'s [[Lockheed Model 10 Electra]] with the circular ''RDF'' aerial visible above the cockpit")
![Direction finding antenna near the city of [[Lucerne]], [[Switzerland]]](https://commons.wikimedia.org/wiki/Special:FilePath/Peilantenne1.jpg?width=200 "Direction finding antenna near the city of [[Lucerne]], [[Switzerland]]")
![Galeta Island]])}}](https://commons.wikimedia.org/wiki/Special:FilePath/NSGA Galeta Island Site.jpg?width=200 "Galeta Island]])}}")
![ILS Localizer]] (providing horizontal guidance)}}](https://commons.wikimedia.org/wiki/Special:FilePath/Whiteman localizer.jpg?width=200 "ILS Localizer]] (providing horizontal guidance)}}")
![[[VORTAC]] (providing [[azimuth]] guidance)}}](https://commons.wikimedia.org/wiki/Special:FilePath/VORTAC TGO Aichtal Germany 01.JPG?width=200 "[[VORTAC]] (providing [[azimuth]] guidance)}}")
![RDF on 121.5 MHz ([[Aircraft emergency frequency]])}}](https://commons.wikimedia.org/wiki/Special:FilePath/Radiogoniométrie VHF.JPG?width=200 "RDF on 121.5 MHz ([[Aircraft emergency frequency]])}}")
![Aereal 121.5/156.8 [[MHz]] (Emergency location beacon aircraft)}}](https://commons.wikimedia.org/wiki/Special:FilePath/RDF receivers antenna emergency location beacon aircraft 01.jpg?width=200 "Aereal 121.5/156.8 [[MHz]] (Emergency location beacon aircraft)}}"){kind=tracking}
![RDF station 410 [[kHz]]}}](https://commons.wikimedia.org/wiki/Special:FilePath/Station radio goniométrique.JPG?width=200 "RDF station 410 [[kHz]]}}")
Wikipedia
The Resource Description Framework (RDF) is a World Wide Web Consortium (W3C) standard originally designed as a data model for metadata. It has come to be used as a general method for description and exchange of graph data. RDF provides a variety of syntax notations and data serialization formats, with Turtle (Terse RDF Triple Language) currently being the most widely used notation.
RDF is a directed graph composed of triple statements. An RDF graph statement is represented by: 1) a node for the subject, 2) an arc that goes from a subject to an object for the predicate, and 3) a node for the object. Each of the three parts of the statement can be identified by a URI. An object can also be a literal value. This simple, flexible data model has a lot of expressive power to represent complex situations, relationships, and other things of interest, while also being appropriately abstract.
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. SPARQL is a standard query language for RDF graphs. RDFS, OWL and SHACL are ontology languages that are used to describe RDF data.
