metadata extractions contain version of controlled vocabulary (ontology)
Given the long-term vision of the TOAR data infrastructure, the challenge is to maintain content and understandability in case of changes in the controlled vocabulary.
Those might occur for example when countries split or join and new countries are established.
To accommodate for such changes, we introduced versioning of the controlled vocabulary and preserve this information with the metadata. This allows for the correct interpretation of outdated vocabulary even after decades.
The database field containing this information is:
SELECT extversion FROM pg_extension WHERE extname='toar_controlled_vocabulary';