schemas/VegCore/VegCore.ERD.mwb: aggregate_observation: inherit from taxon_presence, since this is a type of taxon_presence and it avoids duplicating the taxon_concept field
schemas/VegCore/VegCore.ERD.mwb: aggregate_observation: inherit from taxon_presence, since this is a type of taxon_presence and it avoids duplicating the taxon_concept field