L ist of authorities that we connect our Qi CMS to via Linked Open Data (API) and so far we have the Getty Thesauri, Wikipedia, VIAF Geonames. Nomenclature(don't have a public API), but we can download them and import them into the database. The big one we cannot seem to be able to figure out is LOC (Library or Congress) and specifically the Library of Congress Subject Headings (LCSH) and Thesaurus for Graphic Materials (TGM). Is anyone aware of an API that (like the vocab.getty.edu ) could be queries via SPARQL or anything similar? Failing that, can they be downloaded in a usable format (i.e. one we can import in a database)? For TGM, XML and TXT files are here , (although a little strange, as they have no formal hierarchy), but we cannot find an equivalent for LCSH: this page lists a few formats, but it's not clear how to download them or indeed use them. Integrations ...