Provenance. Built from CalCOFI integrated database release v2026.07.30 on 2026-07-30 from sample, obs, obs_attribute, sample_measurement, taxon.
CF scope. CF-1.10 where CF applies (coordinates, units, standard names, time). The site -> tow -> net -> occurrence hierarchy uses netCDF-4 groups with explicit parent_index links; CF defines no feature type for this nesting.