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SKOS

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SKOS

Describes thesauruses and taxonomies Properties: broader, narrower, subject,

related Classes: Concept, Collection http://www.w3.org/2004/02/skos/core

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SKOS SKOS (Simple Knowledge Organization System)

aims to emphasize that: The scope of SKOS extends beyond thesauri to

classification schemes, subject heading systems, taxonomies, glossaries, controlled vocabularies etc.

The semantic web is not just about interchange of data, but also about the organization of data in a distributed, decentralized way.

RDF is not a file format, but a data formalism designed to support distributed data management in a web environment

Namespace for SKOS: http://www.w3.org/2004/02/skos/core#

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SKOS core vocabulary

skos:Concept: the OWL class of SKOS conceptual resources <MyConcept> rdf:type skos:Concept

skos:prefLabel, skos:altLabel, skos:hiddenLabel are instances of owl:DatatypeProperty <MyResource>

  skos:prefLabel "animals"@en ;   skos:altLabel "fauna"@en ;   skos:hiddenLabel "aminals"@en ;   skos:prefLabel "animaux"@fr ;   skos:altLabel "faune"@fr .

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SKOS core vocabulary

skos:note, skos:changeNote, skos:definition, skos:editorialNote, skos:example, skos:historyNote and skos:scopeNote are instances of owl:ObjectProperty. <MyResource> skos:note <MyNote> . <Protein> rdf:type owl:Class ;

  skos:definition """A physical entity consisting of a sequence of amino-acids; a protein monomer; a single polypeptide chain. An example is the EGFR protein."""@en .

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SKOS core vocabulary

skos:semanticRelation, skos:broader, skos:narrower, skos:related, are instances of owl:ObjectProperty <A> skos:broader <B> ; skos:related <C> . <A> skos:broader <B,> <C> .

<B> skos:broader <D> .<C> skos:broader <D> .

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SKOS core vocabulary

skos:Collection, skos:OrderedCollection, skos:member, skos:memberList are instances of owl:Class. <MyCollection> rdf:type skos:Collection ;

  skos:member <X> , <Y> , <Z> .

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SKOS core vocabulary

skos:mappingRelation, skos:exactMatch, skos:broadMatch, skos:narrowMatch, skos:relatedMatch are instances of owl:ObjectProperty <A> skos:broadMatch <B> ;

skos:relatedMatch <C> . <A> skos:exactMatch <A> .

<B> skos:broadMatch <B> .<C> skos:relatedMatch <C> .

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SKOS example http://www.idealliance.org/proceedings/xtech05/papers/03-04-01/

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SKOS example

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:skos="http://www.w3.org/2004/02/skos/core#">

<skos:Concept rdf:about="http://www.ukat.org.uk/thesaurus/concept/1750"> <skos:prefLabel>Economic cooperation</skos:prefLabel> <skos:altLabel>Economic co-operation</skos:altLabel> <skos:scopeNote>Includes cooperative measures in banking, trade, industry etc., between and among countries. </skos:scopeNote> <skos:inScheme rdf:resource="http://www.ukat.org.uk/thesaurus"/> <skos:broader rdf:resource="http://www.ukat.org.uk/thesaurus/concept/4382"/> <skos:narrower rdf:resource="http://www.ukat.org.uk/thesaurus/concept/2108"/> <skos:narrower rdf:resource="http://www.ukat.org.uk/thesaurus/concept/9505"/> <skos:narrower rdf:resource="http://www.ukat.org.uk/thesaurus/concept/15053"/> <skos:narrower rdf:resource="http://www.ukat.org.uk/thesaurus/concept/18987"/> <skos:related rdf:resource="http://www.ukat.org.uk/thesaurus/concept/3250"/></skos:Concept></rdf:RDF>

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Extending SKOS with FOAF and DC

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Extending SKOS with FOAF and DC

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:foaf="http://xmlns.com/foaf/0.1/"> <skos:Concept rdf:about="http://www.example.org/concepts#laptops"> <skos:prefLabel>notebook computers</skos:prefLabel> <skos:changeNote rdf:parseType="Resource"> <rdf:value>The preferred label for this concept changed from 'laptop computers' to 'notebook computers' on 23 Jan 1999.</rdf:value> <dc:creator> <foaf:Person> <foaf:name>John Smith</foaf:name> <foaf:mbox rdf:resource="mailto:jsmith@example.org"/> </foaf:Person> </dc:creator> <dc:date>1999-01-23</dc:date> </skos:changeNote> </skos:Concept>

</rdf:RDF>

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SKOS application

SWED (Semantic Web Environmental Directory) is to create a directory of UK based environmental organizations via a web portal, collecting information on environmental, natural history and community organizations, to support the wider environment related community in the UK.

http://www.swed.org.uk/swed/index.html

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References: Dublin Core Metadata Initiative:

http://dublincore.org/ FOAF Project

http://www.foaf-project.org/ From MARC to Dublin Core

http://www.loc.gov/marc/marc2dc.html SKOS

http://edutechwiki.unige.ch/en/SKOS FRBR

www.ifla.org/VII/s13/frbr/frbr.pdf