: external.theme.protocolshttps://www.nationaalgeoregister.nl/geonetwork/srv/api/records/registries/vocabularies/ Create a prefix for https://www.nationaalgeoregister.nl/geonetwork/srv/api/records/registries/vocabularies/ Hit Enter to save Double click to create a prefix | dct:uri | https://www.nationaalgeoregist ...... d?ref=external.theme.protocols | : bgt_metadatahttps://data.pldn.nl/geoe3/netherlands/graphs/ Create a prefix for https://data.pldn.nl/geoe3/netherlands/graphs/ Hit Enter to save Double click to create a prefix |