Connecting and enriching information in the national portal NARCIS The National Academic Research and Collaborations Information System (NARCIS) hosted by Data Archiving and Networked Services (DANS) is a portal that collects and disseminates information about scientific work in the Netherlands. Within the EU-funded FREYA project, the use of persistent identifiers (PIDs) in NARCIS has been extended and innovated to connect and integrate research information making it more visible to ...