RDA and the semantic Web

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Lectio magistralis in Library Science by Gordon Dunsire, Florence University, Florence, Italy, 4th March, 2014

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RDA and the semantic Web

  1. 1. RDA and the semantic Web Lectio magistralis in Library Science by Gordon Dunsire Florence University, Florence, Italy 4th March, 2014
  2. 2. In the beginning …
  3. 3. In the beginning …
  4. 4. 3? Toronto, 1997 In the beginning …
  5. 5. General Material Designator (US) General Material Designator (UK) ISBD(G) Content vs Carrier / Haworth Structure of AACR3 Logical analysis / Delsey Type of publication Chief source of information Class of materials ItemSeries Subseries ? $£$£$£!!!
  6. 6. Functional Requirements for Bibliographic Records Work Expression Manifestation Item User tasks AACR3 Item Carrier attributes Content attributes
  7. 7. Functional Requirements for Bibliographic Records Work Expression Manifestation Item User tasks Carrier attributes Content attributes JSC, 2005
  8. 8. Semantic Web (Berners-Lee) Structured collections of information Sets of inference rules Automated reasoning Web of linked data Web of linked documents Web of linked computing devices
  9. 9. “This work has author Gordon Dunsire” Resource Description Framework (RDF) Subject – Predicate - Object Subject Predicate Object “This work” “has author” “Gordon Dunsire” ? ? ? Uniform Resource Identifier (URI) ex:1Bd38 ex:ZX3G5 “literal” For machines For humans Triple!
  10. 10. ex: “This work” “Gordon Dunsire” ex:“has author”
  11. 11. “Gordon Dunsire” ex: Gordon Dunsireex:“has author” ex: “This work” ex:“is author of” ex:“has name”
  12. 12. “Gordon Dunsire” ex: Gordon Dunsireex:“has author” ex: “This work” ex:“is author of” ex:“has name” “G. J. Dunsire” ex:“has alternate name” ex: Scotlandex:“has country of birth” “RDA and the Semantic Web” ex:“has title” ex: “That work” ex:“has derivative work” ex:“is derivative work of”
  13. 13. “Gordon Dunsire” ex: Gordon Dunsireex:“has author” ex: “This work” ex:“is author of” ex:“has name” “G. J. Dunsire” ex:“has alternate name” ex: Scotlandex:“has country of birth” “RDA and the Semantic Web” ex:“has title” ex: “That work” ex:“has derivative work” ex:“is derivative work of”
  14. 14. One giant global graph
  15. 15. ex: Gordon Dunsireex:“has author” ex: “This work” Data vs Ontology Data triple URI ex:“has label” ex: hasAuthor “has author” Ontology triple “Property” ex:“has type”
  16. 16. RDA vocabulary example ex:“has label” rdact: 1010 “notated music”@en “schriftlich fixierte Musik”@de ex:“has label” rdact: 1016 ex: “is related to” “tactile notated music”@en ex:“has label”
  17. 17. ex:“has label” ex: Property1 “has author”@en ex: Property2 ex: “is sub- property of” “has creator”@en ex:“has label” Inference rules: sub-property ex: “This work” “Gordon Dunsire” ex:“has author” ex: “This work” “Gordon Dunsire” ex:“has creator”
  18. 18. RDF vocabularies: DCT + RDFS Dublin Core Terms + RDF Schema rdfs:label dcterms: creator “Creator” dcterms: Agent “Agent” rdfs:label rdfs:range “A resource that acts or has the power to act.”rdfs:comment Source of URIs
  19. 19. Inference rules: range dcterms: creator dcterms: agentrdfs:range ex: Gordon Dunsiredcterms:creator ex: “This work” ex: Gordon Dunsire rdfs:type dcterms: Agent
  20. 20. Data model meeting Panizzi
  21. 21. Data model meeting Members of RDA and Semantic Web communities British Library, London, 30 April – 1 May 2007 “… agreed that RDA and DCMI should work together …” (Dublin Core Metadata Initiative)
  22. 22. Benefits expected The library community gets a metadata standard that is compatible with the Web Architecture and that is fully interoperable with other Semantic Web initiatives The DCMI community gets a libraries application profile firmly based on the DCAM and FRBR (which will be a high profile exemplar for others to follow) The Semantic Web community get a significant pool of well thought-out metadata terms to re-use There is wider uptake of RDA
  23. 23. Activities Development of an RDA Element Vocabulary Development of an RDA DC Application Profile based on FRBR and FRAD Disclosure of RDA Value Vocabularies using RDF/RDFS/SKOS
  24. 24. Opaque URI (only for machines) Compact URI = rdact:1010
  25. 25.
  26. 26. DCAM and RDA Dublin Core Abstract Model <indecs> Basic RDA metadata structures ex: ExpressionURI rdae: “has content type” rdfs:label rdact: 1010 “notated music”@en skos:inScheme rdaterms: RDAContentType
  27. 27. rdac: “Manifestation” rdfs: “domain” High-level metadata structures rdam: “has title” rdau: “has title” rdam: “has title proper” rdau: “has title proper” rdfs: “domain” sP sP sP sP = rdfs:”sub-property of” Constrained by FRBR (domain) Unconstrained
  28. 28. rdac: “Work” rdfs: “domain” Relationship designators rdaw: “has creator” rdau: “has creator” rdaw: “has designer” rdau: “has designer” sP sP sP sP = rdfs:”sub-property of” rdac: “Agent” rdfs: “range”
  29. 29. Entity Properties Range No Range Work 235 200 35 Expression 235 190 45 Manifestation 210 50 160 Item 50 40 10 Agent 225 175 50 Link-ability Triple clusters Triple chains Literals Relationships AttributesDomains Covering all media
  30. 30. rdaw: “is video screenplay (work)” rdaw: “is screenplay (work)” rdaw: “is complemented by (work)” rdaw: “has accompanying work relationship with” rdaw: “has related work”Rich detail sub-property ladder
  31. 31. rdau: “has voice actor” rdau: “has actor” rdau: “has performer” rdau: “has creator” rdaw: “has creator” Interoperability dcterms: “creator” dc: “creator” ???
  32. 32. To do Publish more RDA value vocabularies Develop cross-entity elements E.g. Work-Expression relationship designators Develop Application Profile for RDA “core” Develop RDF elements for aggregated statements (RDA, ISBD, MARC, …) E.g. Place of publication -> Publication statement
  33. 33. Achievements: 5+ years on Rich set of elements and value vocabularies for “bibliographic control” At global, “universal” level “a metadata standard that is compatible with the Web Architecture and that is fully interoperable with other Semantic Web initiatives” “a significant pool of well thought-out metadata terms to re-use” Wider uptake of RDA? …
  34. 34. Thank you! gordon@gordondunsire.com Text of lecture http://digital.casalini.it/9788876560132

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