H. , X. Json, C. , and R. /. Xml, A SparqlEndpoint based on the Virtuoso software offers the possibility to express queries using SPARQL languages In 2013, the TGIR Huma-Num and DANS developed a prototype (Proof of Concept) in order to show the connection between two repositories NARCIS (DANS) and ISIDORE. The connections relied on the two SparqlEndpoints and the alignment of the disciplinary vocabularies used by these systems (cf