ID_PRE_OCCURRENCE - AtlasOfLivingAustralia/ala-dataquality Wiki
The date the identification was made predates the date of the occurrence (collection, gathering or sighting for example).
Implications and caveats
identificationDate can be earlier than the
eventDate if the organism is
observed or collected multiple times, e.g. a ringed bird, the same tree that is
observed or collected from multiple times, or a living plant from a known
In many data sets, however, it is almost always an error.
Data custodian recommendations
Review date information supplied.