This video series introduces the use of controlled vocabulary for datasets that will be published to OBIS. It covers how to populate the measurementTypeID, measurementUnitID, and measurementValueID fields using controlled vocabulary and URIs. We particularly focus on vocabularies obtainable through the NERC vocabulary server. Useful links: * SeaDataNet P01 facet search: vocab.seadatanet.org/p01-facet-search * OBIS vocabs GitHub repository: github.com/nvs-vocabs/OBISVocabs/issues * OBIS Manual controlled vocabulary guidelines: manual.obis.org/vocabulary.html#map-emof-measureme… * NERC vocabulary server: vocab.nerc.ac.uk/search_nvs/