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Library of Congress Linked Data Service

The LC Linked Data Service is an initiative of the Library of Congress that publishes authority dataaslinked data.^[1] It is commonly referred to by its URI: id.loc.gov.^[2]

The first offering of the LC Linked Data Service was the Library of Congress Subject Headings (LCSH) dataset, which was released in April 2009.^[3]

Datasets[edit]

• Library of Congress Subject Headings (LCSH)
• Library of Congress Name Authority File (LCNAF)
• Library of Congress Classification—because LC Classification uses a different MARC format than LC Authorities, mapping LC Classification to MADS/RDF was more difficult than mapping LCSH or LCNAF.^[2]
• Library of Congress Thesaurus for Graphic Materials
• Various MARC codes
• Various preservation vocabularies

Formats[edit]

The service presents data in MADS/RDF and SKOS where appropriate, but also uses its own ontology to describe classification resources and relationships more accurately.^[2] All records are available individually via content negotiationasXHTML/RDFa, RDF/XML, N-Triples, and JSON.^[4]

Each vocabulary is also available to download in its entirety. Id.loc.gov does not currently provide a SPARQL endpoint.^[5][6]

Uses[edit]

All of LCSH are crosslinked with RAMEAU [d] (Répertoire d’autorité-matière encyclopédique et alphabétique unifié), an authority file from the Bibliothèque nationale de France.^[4]

Technical aspects[edit]

The id.loc.gov site initially used a fairly lightweight Python program to serve linked data.^[5]

See also[edit]

• Authority control
• BIBFRAME
• Personennamendatei (PND)
• Virtual International Authority File (VIAF)

References[edit]

External links[edit]

• LC Linked Data Service

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