Notation 3(n3)
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Notation 3 (N3) is a language for representing information in graphs or triples with subjects, predicates, and objects. It allows defining vocabularies to classify things and properties between them. Prefixes can represent long URIs as shorthand. Equivalences show when terms in one vocabulary are the same in another. Vocabularies should be published on servers with committed URI spaces to maintain them over time.
![Square Braces [ ]
Something exists with given properties but don't give you a way to
refer to it elsewhere in this or another document
Example
<#pat> <#child> [<#age> 4, <#age> 3].](https://image.slidesharecdn.com/notation3n3-140617185331-phpapp01/85/Notation-3-n3-6-320.jpg)
![Square Braces []
Futher
[<#name> Ram"; <#age> 24; <#eyecolor> "blue" ].
[<#name> Hari" ; <#age> 28; <#eyecolor> "green" ].
[<#name> Shyam" ; <#age> 6; <#eyecolor> "green" ].](https://image.slidesharecdn.com/notation3n3-140617185331-phpapp01/85/Notation-3-n3-7-320.jpg)
![Writing Data
@prefix: <#> Document itself
:pat :child [:age 4], [:age 3].](https://image.slidesharecdn.com/notation3n3-140617185331-phpapp01/85/Notation-3-n3-10-320.jpg)
![Example
There is person, Pat, known as "Pat Smith" and "Patrick Smith". Pat
has a pet dog named "Rover".
@prefix : <http://www.w3.org/2000/10/swap/test/demo1/about-pat#> .
@prefix bio: <http://www.w3.org/2000/10/swap/test/demo1/biology#> .
@prefix per: <http://www.w3.org/2000/10/swap/test/demo1/friends-vocab#>.
:pat a bio:Human;
per:name "Pat Smith", "Patrick Smith";
per:pet [
a bio:Dog; per:name "Rover"
] .](https://image.slidesharecdn.com/notation3n3-140617185331-phpapp01/85/Notation-3-n3-17-320.jpg)
Notation 3(n3)
- 1. Notation 3(N 3) Presented By Yogendra Tamang 070-MSCS-670
- 2. Outline Introduction Square Brackets Sharing Concepts Making Vocabularies Equivalence Publishing References
- 3. Introduction RDF just collection of objects in subject, verb and object form Everything represented by URI Object may be literal More readable <#Ram> <#Knows> <#Sita> <#Ram> <#age> 25. <#pat> has <#child> <#jo>. <#jo> is <#child> of <#pat>.
- 4. Introduction Several statements about same subjects Semicolon (;) : describing property of same subject. Comma(,) : Another object with same predicate and subject. <#pat> <#child> <#al>, <#chez>, <#jo>; <#age> 24; <#eyecolor> blue.
- 5. Example: Age Eye Color Ram 24 blue Hari 28 green Shyam 6 green <#Hari> <#age> 24;<#eyecolor> blue. <#Ram> <#age> 28;<#eyecolor> green. <#Ram> <#age> 6;<#eyecolor> green.
- 6. Square Braces [ ] Something exists with given properties but don't give you a way to refer to it elsewhere in this or another document Example <#pat> <#child> [<#age> 4, <#age> 3].
- 7. Square Braces [] Futher [<#name> Ram"; <#age> 24; <#eyecolor> "blue" ]. [<#name> Hari" ; <#age> 28; <#eyecolor> "green" ]. [<#name> Shyam" ; <#age> 6; <#eyecolor> "green" ].
- 8. Sharing concepts Semantic Web Can not define in one document what something means. Uses URI for concepts <> <#title> Semantic Web Introduction. N3 allows a shorthand prefix for long part namespace <>< http://purl.org/dc/element/1.1/title > Semantic Web Introduction @prefix dc: <http://purl.org/dc/element/1.1> <> dc:title Semantic Web Introduction
- 9. Conventions on using prefix Use colon and dc and titile No angular brackets Prefix can be used for rest of file Well known namespaces @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix owl: <http://www.w3.org/2002/07/owl#> .
- 10. Writing Data @prefix: <#> Document itself :pat :child [:age 4], [:age 3].
- 11. Making Vocabularies Define new classes of things and new properties What type of thing is X ??? Answer: X belongs to ClassName Property what type of something is ? Rdf:type a ** Define a class Person :Person a rdfs:class. ** Create a object of class Person :pat a :Person.
- 12. Making Vocabularies An object may be of many classes Example :Woman a rdfs:Class; rdfs:SubClassOf :Person. Property declares relationship between two things Example :sister a rdf:Property
- 13. Domain and Range When subject of property must be in a class, that class is domain of the property When object must be in a class that class is range of property :sister rdfs:domain :Person; rdfs:range :Woman. Class identifiers start with capitals and properties small letters
- 14. Equivalence One or more terms in one vocabulary may be same in another vocabulary Very Useful :Woman=foo:FemaleAdult :Title a rdf:Property;=dc:title. Interchange of Data
- 15. Choosing Namespace and Publishing your Vocabulary RDF Schema and OWL Vocabularies Machine Readable Create URI as vocabulary terms that work on browsers ex: http://example.com/terms Publish on server and portion of URI space of organization that commit to maintain on future too..
- 16. Shorthand for common predicates a <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> = <http://www.w3.org/2002/07/owl#sameAs> => <http://www.w3.org/2000/10/swap/log#implies> <= <http://www.w3.org/2000/10/swap/log#implies> but in the inverse direction
- 17. Example There is person, Pat, known as "Pat Smith" and "Patrick Smith". Pat has a pet dog named "Rover". @prefix : <http://www.w3.org/2000/10/swap/test/demo1/about-pat#> . @prefix bio: <http://www.w3.org/2000/10/swap/test/demo1/biology#> . @prefix per: <http://www.w3.org/2000/10/swap/test/demo1/friends-vocab#>. :pat a bio:Human; per:name "Pat Smith", "Patrick Smith"; per:pet [ a bio:Dog; per:name "Rover" ] .
- 19. References http://www.w3.org/2000/10/swap/doc/ http://www.csee.umbc.edu/courses/graduate/691/spring13/01/pape rs/n3logic-tplp.pdf http://www.w3.org/2000/10/swap/doc/cwm.html http://www.w3.org/TeamSubmission/2011/SUBM-n3-20110328/