Atramhasis is an online vocabulary editor that allows users to create, maintain and consult controlled vocabularies and thesauri (Harpring, 2010) according to the SKOS specification (Miles & Bechhofer, 2008). SKOS (Simple Knowledge Organisation System) is a W3C Recommendation that supports controlled vocabularies within the framework of the Semantic Web. SKOS provides a standard way to represent these vocabularies using RDF (Resource Description Framework) (Schreiber & Raimond, 2014), another W3C Recommendation that allows passing data between computer applications in an interoperable way.