Materials from the FREYA event Project FREYA: Connecting Open Knowledge in the European Open Science Cloud held on 21 October 2019 co-located with RDA P14 in Helsinki, Finland. Materials include presentation slides about the FREYA project, specifically the outputs relating to the PID Graph, plans for new PID types and sustainability planning. The Jupyter notebooks used for the PID Graph tutorial are available at https://doi.org/10.14454/3bpw-w381 and https://doi.org/10.14454/628m-3882.