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RDA: thinking globally, acting globally


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RDA: thinking globally, acting globally

  1. 1. RDA: thinking globally, acting globally Gordon Dunsire Presented at International Developments in Library Linked Data: Think Globally, Act Globally – Part Two: an ALCTS Program, ALA Annual, Las Vegas, USA, 28 Jun 2014
  2. 2. Overview Failure of top-down approach RDA tools Case: intended audience Mapping the focus of description Top-down, bottom-up issues
  3. 3. BibO: Bibliographic Ontology Confusing tongues? BIBFRAME: Bibliographic Framework Say what we mean CRM: Conceptual Reference Model DC: Dublin Core FR: Functional Requirements ISBD: International Standard Bibliographic Description MARC21 RDA: Resource Description and Access UNIMARC KOS++ Universal Bibliographic Control RDF Thinking globally Acting locally
  4. 4. For unFRBRized applications 30 million (partial) examples Links to other vocabularies Element set + Relationship designators
  5. 5. Globalizing RDA linked data Language-neutral URIs (immutable) Language-specific URIs (for developers) Language-specific labels and definitions (for humans)
  6. 6. Unconstrained versions Map of “Audience” umarc: m “adult, general” “adult, serious” pbcore: adult “adult” m21: e “adult” MPAA: NC-17? BBFC: 18? Element sets (schema) Value vocabularies (KOS) Broader/narrower/same? m21: “Target audience of …” m21: “Target audience” schema: “audience” dct: “audience” rdau: “Intended audience” isbd: “has note on use or audience” isbdu: “has note on use or audience” rdfs:subPropertyOf umarc: k bf: “Intended audience” frbrer: “has intended audience” rdaw: “Intended audience”
  7. 7. isbd: Resource bf: Work bf: Instance rda: Work rda: Expression rda: Manifestation rda: Item isbd:P1193 (has work aspect ) isbd:P1190 (has expression aspect ) isbd:P1192 (has manifestation aspect ) isbd:P1191 (has item aspect ) rdae:P20231 (has work expressed) rdai:P40049 (has manifestation exemplified) rdam:P30139 (has expression manifested) bf: instanceOf bf: expressionOf marc21: Resource ? Mapping entities
  8. 8. Top-down Examine local schema Identify the common elements Create a common/global element set (RDF) Refine the global element set to connect down (map) to specific local elements Issues Common elements may not cover the same space as local elements Refinement not possible Common elements have to be augmented Favours the global over the local Encourages a good-enough approach
  9. 9. Bottom-up Publish the local schema(s) in RDF Map local elements from different schema to lowest common (dumber) elements – add new elements if necessary Continue until all local schema have been mapped Issues Multiplicity of RDF element sets Frequent overlap and redundancy Local management resources
  10. 10. Thank you!   Published RDA element sets  Published RDA value vocabularies  Vocabularies Project: versions, issues, feedback