introduction to linked data: rdf vocabularies
TRANSCRIPT
An Introduction
toLinked Data
David Hyland-WoodUniversity of Mary Washington
Part 5 of 5RDF Vocabularies
Wednesday, May 25, 2011
A Tour of RDF Vocabularies
Wednesday, May 25, 2011
Some Commonly Used RDF Vocabularies
• Friend of a Friend (FOAF)Project: http://www.foaf-project.org/
Namespace: http://xmlns.com/foaf/0.1/
• Description of a Project (DOAP)Project: http://trac.usefulinc.com/doap
Namespace: http://usefulinc.com/ns/doap#
• Dublin Core (DC)
Project: http://dublincore.org/documents/dcq-rdf-xml/
Namespace: http://purl.org/dc/elements/1.1/
Wednesday, May 25, 2011
Some Commonly Used RDF Vocabularies
• Semantically-Interlinked Online Communities (SIOC)Project: http://sioc-project.org/
Namespace: http://rdfs.org/sioc/ns#
• Vocabulary of Interlinked Datasets (VoiD)Project: http://semanticweb.org/wiki/VoiD, http://vocab.deri.ie/void
Namespace: http://rdfs.org/ns/void#
• vCardProject: http://www.w3.org/TR/vcard-rdf/
Namespace: http://www.w3.org/2006/vcard/ns#
Wednesday, May 25, 2011
Some Commonly Used RDF Vocabularies
• Web Ontology Language (OWL)Project: http://www.w3.org/TR/owl2-overview/
Namespace: http://www.w3.org/ns/owl2-xml
• Simple Knowledge Organisation System (SKOS)Project: http://www.w3.org/2004/02/skos/
Namespace: http://www.w3.org/2004/02/skos/core#
Wednesday, May 25, 2011
Some Commonly Used RDF Vocabularies
• RDF Schema (RDFS)Project: http://www.w3.org/TR/rdf-schema/
Namespace: http://www.w3.org/2000/01/rdf-schema#
NB: RDFʼs namespace is:
http://www.w3.org/1999/02/22-rdf-syntax-ns#
• XML Schema DatatypesProject: http://www.w3.org/TR/xmlschema-2/
Namespace: http://www.w3.org/2001/XMLSchema#
Wednesday, May 25, 2011
FOAF Core• Agent• Person• name• title• img• depiction (depicts)• familyName• givenName• knows• based_near
• age• made (maker)• primaryTopic
(primaryTopicOf)• Project• Organization• Group• member• Document• Image
Wednesday, May 25, 2011
FOAF Core• Agent• Person
• name• title• img
• depiction (depicts)
• familyName• givenName
• knows
• based_near• age• made (maker)
• primaryTopic (primaryTopicOf)
• Project• Organization• Group• member• Document• Image
Wednesday, May 25, 2011
FOAF Social Web• nick• mbox• homepage• weblog• openid• jabberID• mbox_sha1sum• interest• topic_interest• topic (page)• workplaceHomepage• workInfoHomepage• schoolHomepage
• publications• currentProject• pastProject• account• OnlineAccount• accountName• accountServiceHomepage• PersonalProfileDocument• tipjar• sha1• thumbnail• logo
Wednesday, May 25, 2011
DOAP Classes• CVS Repository• Git Repository• BitKeeper Repository• Subversion Repository• GNU Arch repository• darcs Repository• Version• Specification• Mercurial Repository• Repository• Project• Bazaar Branch
Wednesday, May 25, 2011
DOAP Properties• Implements specification• anonymous root• platform, browse• mailing list• programming language• category• homepage• description• helper• tester• short description• audience• screenshots
• translator• module• documenter• wiki• repository• name• repository location• language• service endpoint• created• developer• vendor• download mirror
Wednesday, May 25, 2011
DOAP Properties• old homepage• revision• download page• license• bug database• maintainer• blog• file-release• operating system• release
Wednesday, May 25, 2011
DOAP• name• homepage• developer• programming-
language• os• license
Wednesday, May 25, 2011
Dublin Core Classes• Agent• AgentClass• BibliographicResource• FileFormat• Frequency• Jurisdiction• LicenseDocument• LinguisticSystem• Location• LocationPeriodOrJurisdicti
on• MediaType
• MediaTypeOrExtent• MethodOfAccrual• MethodOfInstruction• PeriodOfTime• PhysicalMedium• PhysicalResource• Policy• ProvenanceStatement• RightsStatement• SizeOrDuration• Standard
Wednesday, May 25, 2011
Dublin Core Properties• abstract• accessRights• accrualMethod• accrualPeriodicity• accrualPolicy• alternative• audience• available• bibliographicCitation• conformsTo• contributor• coverage• created
• creator• date• dateAccepted• dateCopyrighted• dateSubmitted• description• educationLevel, extent,
format, hasFormat• hasPart• hasVersion• identifier• instructionalMethod• isFormatOf
Wednesday, May 25, 2011
Dublin Core Properties• isPartOf• isReferencedBy• isReplacedBy• isRequiredBy• issued• isVersionOf• language• license• mediator• medium• modified• provenance
• publisher• references• relation• replaces• requires• rights• rightsHolder• source• spatial• subject• tableOfContents• temporal
Wednesday, May 25, 2011
Dublin Core Properties• title• type• valid
Wednesday, May 25, 2011
Dublin Core• abstract• creator• date• description• publisher• title
Wednesday, May 25, 2011
Guidance
• To name things:• rdfs:label• foaf:name• skos:prefLabel
• To describe people:• FOAF, vCard
• To describe projects:• DOAP
Wednesday, May 25, 2011
Guidance
• To describe Web pages and other publications:• dc:creator, dc:description, etc.
• To describe an RDF schema/vocabulary/ontology:• VoiD
• To describe addresses:• vCard
Wednesday, May 25, 2011
Guidance
• To model simple data:• RDF, RDFS, vocabularies
• To model existing taxonomies:• SKOS
• To model complex data and/or allow for logical inference:• OWL
Wednesday, May 25, 2011
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Wednesday, May 25, 2011