GEMET Thesaurus	Astronomical Subject Keywords (2013)	Source
http://voparis-ns.obspm.fr/rdf/editors/astro-subjects-keywords#diffusion	http://www.eionet.europa.eu/gemet/concept/2186	LOOM
http://voparis-ns.obspm.fr/rdf/editors/astro-subjects-keywords#time	http://www.eionet.europa.eu/gemet/concept/8487	LOOM