Which standards are used to manage controlled vocabularies and thesauri?

Void (http://www.w3.org/TR/void/) as well as ADMS (http://www.w3.org/ns/adms) is used to describe all kind of metadata of the whole SKOS graph (author, subject, SPARQL endpoint etc.). PoolParty is built on W3C SKOS and RDF Schema. SKOS Core and SKOS Mappings are pre-defined. Administrators can extend the SKOS schema by additional RDF properties (e.g. DCterms, FOAF etc. or individual properties).