Library of Congress Linked Data Service
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. 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 (), 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.