1. An
Introduction
to
Linked Data
Part 5 of 5 David Hyland-Wood
RDF Vocabularies University of Mary Washington
Wednesday, May 25, 2011
2. A Tour of RDF
Vocabularies
Wednesday, May 25, 2011
3. 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
4. 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#
• vCard
Project: http://www.w3.org/TR/vcard-rdf/
Namespace: http://www.w3.org/2006/vcard/ns#
Wednesday, May 25, 2011
5. 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
6. 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 Datatypes
Project: http://www.w3.org/TR/xmlschema-2/
Namespace: http://www.w3.org/2001/XMLSchema#
Wednesday, May 25, 2011
7. FOAF Core
• Agent • age
• Person • made (maker)
• name • primaryTopic
• title (primaryTopicOf)
• img • Project
• depiction (depicts) • Organization
• familyName • Group
• givenName • member
• knows • Document
• based_near • Image
Wednesday, May 25, 2011
8. FOAF Core
• Agent • based_near
• Person • age
• name • made (maker)
• title • primaryTopic
• img (primaryTopicOf)
• depiction •
•
Project
Organization
(depicts)
• Group
• familyName
• member
• givenName
• Document
• knows • Image
Wednesday, May 25, 2011
18. Dublin Core
• abstract
• creator
• date
• description
• publisher
• title
Wednesday, May 25, 2011
19. Guidance
• To name things:
• rdfs:label
• foaf:name
• skos:prefLabel
• To describe people:
• FOAF, vCard
• To describe projects:
• DOAP
Wednesday, May 25, 2011
20. 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
21. 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