Distribution extension

The distribution extension is defined as:

Geographic distribution of a taxon

It allows to express where a species occurs (on a broad geographic scale, e.g. for a country) and what status it has there. A single taxon can have multiple distribution records. The extension contains a mix of Darwin Core and other terms. Depending on the source data, we recommend to use the following terms:

term	mapping	example
taxonID	foreign key to the Taxon core	alien-fishes-checklist:taxon:dec8ee68b3fae146c056b4972e3e6b83
locality	free form	Flemish Region
countryCode	vocabulary	BE
occurrenceStatus	vocabulary	present
threatStatus	vocabulary (mainly for red list species)	endangered
establishmentMeans	vocabulary (mainly for alien species)	introduced
source	a citation	Verreycken et al. 2018
occurrenceRemarks	free form	based on citizen science observations

For the full list of terms and definitions, see Species Distribution. For detailed information on how to publish a Darwin Core Archive checklist, see the GBIF Best Practices in Publishing Species Checklists.