http://www.w3.org/2004/02/skos/core#Concept

used by 54:

• apr-register-of-regional-development-measures-and-incentives
• artenuevosmedios-gnoss
• a-z-of-terms-dfe
• courts-thesaurus
• data-bnf-fr
• dbpedia-eu
• didactalia
• enel-open-data-dcat
• english-heritage-building-materials-thesaurus
• english-heritage-components-thesaurus
• english-heritage-event-types-thesaurus
• english-heritage-evidence-thesaurus
• english-heritage-maritime-craft-thesaurus
• english-heritage-monument-types-thesaurus
• fatal-traffic-accidents-in-greek-roads
• fish-archaeological-objects-thesaurus
• gemet-annotated
• global-hunger-index
• global-hunger-index-2011
• gnoss
• gnoss-com-a-social-and-semantic-platform
• green-competitiveness-gnoss
• hellenic-fire-brigade
• ineverycrea
• ineverycrea-argentina
• jel-classification
• klappstuhlclub
• lcsh
• linked-open-ipa
• miguiadeviajes-gnoss
• msc
• nalt
• nextweb-gnoss
• ntnusc
• open-data-risp
• oreilly
• portal-turismo-de-la-rioja
• prospects-and-trends-gnoss
• proyectoapadrina
• rcahms-archaeological-objects-thesaurus
• rcahms-maritime-craft-thesaurus
• rcahms-monument-types-thesaurus
• rcahmw-monument-types-thesaurus
• rcahmw-periods-list
• red-uno-internacional-santillana
• regional-development-measures-and-incentives-data-8-and-data-11
• rkb-explorer-webconf
• southampton-ac-uk-jargon
• southampton-ac-uk-pressinfo
• stitch-rameau
• sudocfr
• taxonconcept
• thesaurus-bncf
• ysa