SKOS Core Simple Knowledge Organisation for the Web DC2005 Madrid

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SKOS CoreSimple Knowledge Organisation for the
WebDC-2005 Madrid
Semantic Web Best Practices and Deployment
Alistair MilesBrian MatthewsMichael
WilsonCCLRC Rutherford Appleton Laboratory Dan
BrickleyW3C
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Intro

• Simple Knowledge Organisation System(s)
• SKOS Core
• http//www.w3.org/2004/02/skos/core/
• Goal
• Simple, flexible, extensible, machine-understandab
  le representation for
• Thesauri
• Classification Schemes
• Taxonomies
• Subject Headings
• Other types of controlled vocabulary

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Basics

• SKOS Core is an application of the Resource
  Description Framework
• RDFS Classes and RDF Properties
• Use it to describe Concepts and Concept Schemes

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Concept

• Concept
• Defined as An abstract idea or notion a unit of
  thought.
• I.e. A unit of meaning.
• The fundamental unit of a concept scheme.

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Concept Scheme

• Concept Scheme
• Defined as A set of concepts, optionally
  including statements about semantic relationships
  between those concepts.
• A
• thesaurus
• classification scheme
• taxonomy
• terminology
• subject heading system
• other type of controlled vocabulary
• is a concept scheme.

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Examples Key
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E.g. Controlled Vocab

• Example controlled vocabulary
• W3C Recommendation
• A W3C Recommendation is a specification or set
  of guidelines that, after extensive
  consensus-building, has received the endorsement
  of W3C Members and the Director. ...
• Working Group Note
• A Working Group Note is published by a chartered
  Working Group to indicate that work has ended on
  a particular topic.

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E.g. Controlled Vocab
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E.g. Taxonomy

• Example taxonomy
• General
• Politics
• Travelling

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E.g. Taxonomy
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E.g. Thesaurus

• Example thesaurus
• Economic cooperation
• UF Economic co-operation
• SN Includes cooperative measures in banking,
  trade, industry etc., between and among
  countries.
• BT Economic policy
• NT Economic integration
• RT Interdependence

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E.g. Thesaurus
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E.g. Classification Scheme

• Example classification scheme
• 90. GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS
• 91. Solid Earth physics
• 91.10.-v Geodesy and gravity
• 91.10.Pp Gravimetric measurements and
  instruments

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E.g. Classification Scheme
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Spotted Bowerbird
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E.g. Subject Indexing
N.B.skossubject rdfssubPropertyOf dcsubject
.skossubject rdfsrange skosConcept .
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Lots More Features

• SKOS Core has lots more features than shown here
• Come to SKOS Core Tutorial
• Thursday 9am

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Other Features

• Multilingual Labelling
• Symbolic Labelling
• Documentation/Annotation
• More for Subject Indexing
• Support for node labels/guide terms/arrays
• Concept Schemes
• Extensible

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SKOS World View
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Development

• N.B. SKOS Core is an Evolving Vocabulary
• SKOS Core is maintained by W3C SWBPD-WG
• Public, consensus-driven, design by open
  community
• All discussion in public, via
• public-esw-thes_at_w3.org
• Review proposals for change every 3 months
• http//www.w3.org/2004/02/skos/core/proposals
• Publish revised working drafts
• http//www.w3.org/TR/swbp-skos-core-guide
• http//www.w3.org/TR/swbp-skos-core-spec
• Change management policy
• http//www.w3.org/TR/swbp-skos-core-spec/secChang
  e

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Status

• SKOS Core Guide and SKOS Core Vocabulary
  Specification are W3C First Public Working Drafts
• Currently second review is underway
• Plan 3rd review December 2005

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Future?

• Should SKOS become a W3C Recommendation Track
  work item?
• (or is it OK for it to end up as a Working Group
  Note?)
• If your organisation wants to use SKOS Core, but
  needs it to be a W3C REC, please let us know.

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Help

• Please tell us what you think/want
• public-esw-thes_at_w3.org
• Even if you dont have comments, please tell us
  if youre using SKOS Core, with as much
  information about how youre using it as you can
  spare time to write.
• Do you have any SKOS data you can share?
• and translations most welcome (we have fr, de,
  nl, pt, but not yet es !)
• http//www.w3.org/2004/02/skos/core/translations

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SKOS Core and DCMI

• SKOS Core and DCMI metadata terms are natural
  partners
• SKOS Core has a refinement of the dcsubject
  property
• Open issues
• How to align DCMI notion of a Vocabulary
  Encoding Scheme with SKOS Core notion of a
  Concept Scheme

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SKOS Core and OWL

• SKOS Core complements OWL
• Can use in combination

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Links

• SKOS Core Homepage
• http//www.w3.org/2004/02/skos/core
• SKOS Core Guide
• http//www.w3.org/TR/swbp-skos-core-guide
• SKOS Core Vocabulary Specification
• http//www.w3.org/TR/swbp-skos-core-spec
• Mailing list
• mailtopublic-esw-thes_at_w3.org
• http//lists.w3.org/Archives/Public/public-esw-the
  s/
• This presentation
• http//isegserv.itd.rl.ac.uk/cvs-public/skos/press
  /dc2005/presentation.ppt
• Diagrams used in this presentation (feel free to
  re-use)
• http//isegserv.itd.rl.ac.uk/cvs-public/skos/press
  /dc2005/img/
• Thanks for listening ?