1. RDA and linked data Gordon Dunsire Presented to Code4Lib Ottawa, MacOdrum Library, Carleton University, Ottawa, 27 April 2016

2. RDA: resource description and access  “RDA is a package of data elements, guidelines, and instructions for creating library and cultural heritage resource metadata that are well-formed according to international models for user-focussed linked data applications.”  RDA Board, 2015  http://www.rda-rsc.org/node/235 http://www.rda-rsc.org/node/235

3. RDA data infrastructure Open Metadata Registry (RDF) RDA Reference: Elements, attributes, relationships, values RDA Registry RDA Toolkit

4. RDA in Resource Description Format  RDA controlled terminologies represented as RDF value vocabularies  Example: RDA carrier type vocabulary  Entities, attributes, and relationships represented as RDF element sets  Entities represented in RDF as classes  Attributes and relationships represented in RDF as properties (“predicates”)  Example: RDA manifestation properties

5. RDA Registry: rdaregistry.info RDA Reference Elements, attributes, relationships Values Other Glossary terms Translations and partial translations

6. Formal or canonical URI is “opaque” - not intended for human readability Lexical URI is intended for human readability in different languages RDF linked data serializations Except HTML for humans

7. Web view Open Metadata Registry (http://metadataregistry.org) Fine granularity audit trail

8. http://rdaregistry.info/Elements/m/P30020De-referenced

9. Unconstrained linked data Remove FRBR model to “dumb-down” semantics to common level of granularity “resources” and “agents” Example: Contributor Relates a resource to an agent contributing to a resource.

10. Beyond RDA data: ISBD ISBDURDAUISBDRDA Work Expression Manifestation Item Resource [Linked data cloud, not RDF graph] Unconstrained (No entity Specified)

11. Multilingual linked data French German Spanish Chinese …

12. Polylingual data (RIMMF-ball French cataloguerEnglish agencyGerman content

13. Global refinement The “4-fold path” supports catalogue cards, flat file schema, RDBMS, and linked data (RDA database scenarios) Describing a related entity: Unstructured description Structured description Identifier URI Relationship property range: Undeclared Literal Typed literal Object

14. RDF property refinement Is contained in (manifestation) OWL Datatype property Is contained in (manifestation) (o) Is contained in (manifestation) (d) OWL Object type property No range Datatype property accommodates plain literals, typed literals, and Syntax Encoding Schemes (structured descriptions)

15. Local refinement “audio belt”: refinement to Carrier type via RDA/ONIX Framework

16. Maps for machines

17. Local vocabularies Vocabulary removed from “global” RDA becomes a “local” vocabulary

18. Conclusion  RDA supports fine-grained linked data compatible with the FRBR model  RDA supports extensions and refinements for cultural heritage data  RDA supports the multilingual Semantic Web  RDA supports linked data application developers  RDA is linked data fun!

19. Thank you!  rscchair@rdatoolkit.org rscchair@rdatoolkit.org  http://www.rda-rsc.org/ [RDA Steering Committee] http://www.rda-rsc.org/  http://www.rdaregistry.info/ http://www.rdaregistry.info/  http://metadataregistry.org/ http://metadataregistry.org/  http://www.marcofquality.com/wiki/rimmf3/ http://www.marcofquality.com/wiki/rimmf3/