“New Dimensions in KOS” CENDI/NKOS Workshop September 11, 2008 Washington, DC, USA An international conference to share and advance knowledge and experience.

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Presentation transcript:

“New Dimensions in KOS” CENDI/NKOS Workshop September 11, 2008 Washington, DC, USA An international conference to share and advance knowledge and experience about standards; the technologies that build upon them, and implementation experiences. SKOS: New Dimensions in Interoperability Ed Summers Jon Phipps

9/11/2008SKOS Joint CENDI / NKOS Workshop2 What is it? Simple Knowledge Organisation System(s) ●SKOS is … ●for declaring and publishing taxonomies, thesauri or classification schemes, for use in a distributed, decentralised information system (I.e. a semantic web). ●for describing Concepts and creating relationships between Concepts and Terms ●A practical application of RDF ●the application of library science to the semantic web. –SKOS provides a formal language for representing controlled, structured vocabularies

The SKOS data model …views a knowledge organization system as a concept scheme comprising a set of conceptual resources (concepts). –These concept schemes and conceptual resources are identified by URIs. –The model is multilingual and extensible 9/11/2008SKOS Joint CENDI / NKOS Workshop3

Concepts can be… labeled with any number of strings. One label, in any given language, can be indicated as the "preferred" label for that language, and all others as "alternate“ labels, "hidden“ labels, or using a notation: – skos:prefLabel – skos:altLabel – skos:hiddenLabel – skos:notation 9/11/2008SKOS Joint CENDI / NKOS Workshop4

Concepts can be… documented with any number of notes of various types. This is intended to provide an extensible framework for more specific types of notes: – skos:note – skos:changeNote – skos:definition – skos:editorialNote – skos:example – skos:historyNote – skos:scopeNote 9/11/2008SKOS Joint CENDI / NKOS Workshop5

Concepts can be… linked to one or more concept schemes. –skos:inScheme, a property of a concept –skos:hasTopConcept, a property of a concept scheme. (replaces skos:topConcept, a property of a concept) 9/11/2008SKOS Joint CENDI / NKOS Workshop6

Concepts can be… linked to other concepts within the same concept scheme. ●Hierarchical links: –skos:broader and skos:narrower –skos:broaderTransitive and skos:narrowerTransitive ●Associative links: –skos:related 9/11/2008SKOS Joint CENDI / NKOS Workshop7

Concepts can be… grouped into collections, which can be labeled and/or ordered. –skos: Collection –skos: OrderedCollection –skos: member –skos: memberList 9/11/2008SKOS Joint CENDI / NKOS Workshop8

Concepts can be… mapped to other concepts in different concept schemes. ●Hierarchical mapping: –skos:broadMatch –skos:narrowMatch ●Associative mapping: –skos:relatedMatch –skos:closeMatch –skos:exactMatch 9/11/2008SKOS Joint CENDI / NKOS Workshop9

skosxl… allows labels to be resources: skosxl:Label The skosxl:Label Class skosxl:literalForm The skosxl:Label Class skosxl:prefLabel Preferred skosxl:Label skosxl:altLabel Alternate skosxl:Label skosxl:hiddenLabel Hidden skosxl:Label skosxl:labelRelation Links Between skosxl:Labels 9/11/2008SKOS Joint CENDI / NKOS Workshop10

Going, going… ●Symbols: –skos:prefSymbol –skos:altSymbol ●Subject Indexing: –skos:subject –skos:isSubjectOf –skos:primarySubject –skos:isPrimarySubjectOf –skos:subjectIndicator 9/11/2008SKOS Joint CENDI / NKOS Workshop11

Cool URIs for the Semantic Web

Yeah, but so what...

9/11/2008SKOS Joint CENDI / NKOS Workshop33 SKOS Documentation ●W3C Semantic Web Deployment Working Group –W3C Recommendation Track ●SKOS Use Cases and Requirements –First Working Draft Published ( ) ●SKOS Reference and Primer –Last Call Working Draft published August –W3C Recommendation by December 31, 2008 ●SKOS Web Site – –LCSH, SKOS and Linked data

9/11/2008SKOS Joint CENDI / NKOS Workshop34 Links SKOS Homepage SKOS Primer primer / SKOS Reference reference SWD-WG Home Page SWD-WG Mailing list swd-wg / NSDL Metadata Registry Jon Phipps Thanks for listening