Websites met diverse informatie:
https://osgeo.nl/geonetwork-gebruikersgroep/
https://geonetwork-opensource.org/
https://geoforum.nl/c/applicaties-en-diensten/geonetwork
Relevante github repositories:
https://github.com/geonetwork/core-geonetwork
https://github.com/metadata101/iso19139.nl.geografie.2.0.0