Library of Congress Linked Data Service
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The LC Linked Data Service is an initiative of the Library of Congress that publishes authority data as linked data. It is commonly referred to by its URI: id.loc.gov.
The first offering of the LC Linked Data Service was the Library of Congress Subject Headings (LCSH) dataset, which was released in April 2009.
Datasets
- 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.
- Library of Congress Thesaurus for Graphic Materials
- Various MARC codes
- Various preservation vocabularies
The Library of Congress offers users the opportunity to create their own datasets with library application profiles (APIs).
Formats
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. All records are available individually via content negotiation as XHTML/RDFa, RDF/XML, N-Triples, and JSON.
Each vocabulary is also available to download in its entirety. Id.loc.gov does not currently provide a SPARQL endpoint.
Uses
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.
Technical aspects
The id.loc.gov site initially used a fairly lightweight Python program to serve linked data.
See also
- Authority control
- BIBFRAME
- Library of Congress Control Number (LCCN)
- Personennamendatei (PND)
- Virtual International Authority File (VIAF)
External links
- Library of Congress authority ID (P244) (see uses)