RDA and linked data Gordon Dunsire Presented to

RDA and linked data Gordon Dunsire Presented to Code 4 Lib Ottawa, Mac. Odrum Library, Carleton University, Ottawa, 27 April 2016

RDA: resource description and access v“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. ” v. RDA Board, 2015 vhttp: //www. rda-rsc. org/node/235

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

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

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

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

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

http: //rdaregistry. info/Elements/m/P 30020 De-referenced

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.

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

Multilingual linked data French German Spanish Chinese …

Polylingual data (RIMMF-ball French cataloguer German content English agency

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

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

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

Maps for machines

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

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

Thank you! vrscchair@rdatoolkit. org vhttp: //www. rda-rsc. org/ [RDA Steering Committee] vhttp: //www. rdaregistry. info/ vhttp: //metadataregistry. org/ vhttp: //www. marcofquality. com/wiki/rimmf 3/