The Library of Congress : enhancement of its ID.LOC.GOV web service

"Authorities and Vocabularies", which provides access to Library of Congress standards and vocabularies as Linked Data:
*Thesaurus of Graphic Materia
*MARC Code List for Relators
*Cryptographic Hash Functions
*Preservation Events
*Preservation Level Role
The Authorities and Vocabularies web service was first made available in May 2009 and offered the Library of Congress Subject Headings (LCSH), the Library's initial entry into the Linked Data movement. In part by assigning each vocabulary and each data value within it a unique resource identifier (URI), the service provides a means for machines to semantically access, use, and harvest authority and vocabulary data that adheres to W3C recommendations, such as Simple Knowledge Organization System (SKOS).
Please explore it for yourself at http://id.loc.gov.

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