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Notation3, or N3 as it is more commonly known, is a shorthand non-XML serialization of Resource Description Framework models, designed with human-readability in mind: N3 is much more compact and readable than XML RDF notation. The format is being developed by Tim Berners-Lee and others from the Semantic Web community. A formalization of the logic underlying N3 was published by Berners-Lee and others in 2008.[1]

Notation3
Filename extension.n3
Internet media typetext/n3;charset=utf-8
Developed byTim Berners-Lee
Type of formatsemantic web
Container forRDF data
StandardSpecification

N3 has several features that go beyond a serialization for RDF models, such as support for RDF-based rules. Turtle is a simplified, RDF-only subset of N3.

Contents

ExamplesEdit

This RDF model in standard XML notation

<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:dc="http://purl.org/dc/elements/1.1/">
  <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Tony_Benn">
    <dc:title>Tony Benn</dc:title>
    <dc:publisher>Wikipedia</dc:publisher>
  </rdf:Description>
</rdf:RDF>

may be written in Notation 3 like this:

 @prefix dc: <http://purl.org/dc/elements/1.1/>.
 
 <http://en.wikipedia.org/wiki/Tony_Benn>
   dc:title "Tony Benn";
   dc:publisher "Wikipedia".

(This example would also be valid Turtle.)

Comparison of Notation3, Turtle, and N-TriplesEdit

Feature Notation3 Turtle N-Triples
Character encoding UTF-8 UTF-8 ASCII
Directives @base      
@forAll      
@forSome      
@keywords      
@prefix      
Lists
() (DAML lists)      
{ … } (statement lists)      
Literals true / false
(Boolean)
     
xsd:decimal
(decimal arbitrary length)
     
xsd:double
(decimal double)
     
xsd:integer
(decimal integer)
     
Syntactic sugar RDF paths      
QNames      
a/@a (equiv. to rdf:type)      
[] (shorthand for blank node)      
=> (x implies y)      
<= (y implies x)      
= (x is equivalent to y)      
, (repeat object in list)      
; (repeat subject/verb in list)      

See alsoEdit

External linksEdit

ReferencesEdit

  1. ^ Berners-Lee, T. I. M.; Connolly, D. A. N.; Kagal, L.; Scharf, Y.; Hendler, J. I. M. (2008). "N3Logic: A logical framework for the World Wide Web". Theory and Practice of Logic Programming. 8 (3). arXiv:0711.1533. doi:10.1017/S1471068407003213.