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| Owner | Library of Congress |
|---|---|
| URL | id |
| Commercial | No |
Content license | Public domain |
| Written in | Python |
The LC Linked Data Service is an initiative of the Library of Congress that publishes authority data as linked 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 negotiation as XHTML/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 (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
- Library of Congress Control Number (LCCN)
- Personennamendatei (PND)
- Virtual International Authority File (VIAF)
References
[edit]- ^ "About". LC Linked Data Service. Library of Congress. Retrieved 2025-08-06.
- ^ a b c Ford, Kevin (January 2013). "Library of Congress Classification as linked data". JLIS.it. 4 (1). doi:10.4403/jlis.it-5465. Retrieved 2025-08-06.
- ^ Guenther, Rebecca (2025-08-06). LC's Authorities and Vocabularies Web Service: experimenting with Linked Data (PDF). American Library Association Mid-Winter Conference. San Diego, California, US. Retrieved 2025-08-06.
- ^ a b Ford, Kevin (2025-08-06). ID.LOC.GOV, 1 ? Years: Review, Changes, Future Plans, MADS/RDF (PDF). Digital Library Federation Fall Forum. Palo Alto, California, US. Retrieved 2025-08-06.
- ^ a b Summers, Ed; Isaac, Antoine; Redding, Clay; Krech, Dan; Schreiber, Guus; Summers, Ed (2008). "LCSH, SKOS and Linked Data". Web Semantics: Science, Services and Agents on the World Wide Web. 20 (May 2013): 35–49. arXiv:0805.2855. doi:10.1016/j.websem.2013.05.001. S2CID 2266021. (NB. This appears to be two sources mixed up.)
- ^ "Technical Center". LC Linked Data Service. Retrieved 2025-08-06.
External links
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