http://www.w3.org/2000/01/rdf-schema#Literal

used by 14:

• artenuevosmedios-gnoss
• didactalia
• gnoss
• gnoss-com-a-social-and-semantic-platform
• green-competitiveness-gnoss
• ineverycrea
• ineverycrea-argentina
• miguiadeviajes-gnoss
• nextweb-gnoss
• open-data-risp
• portal-turismo-de-la-rioja
• prospects-and-trends-gnoss
• proyectoapadrina
• red-uno-internacional-santillana