An individually identified data object in an information system that represents an observation of a phenomenon by an observer. Occurrences are information system objects that have a representation rel
ationship to the ‘real world'. Occurrences are subjective in that they represent a phenomenon as observed by some individual person or group.
A statement about the presence or absence of a dwc:Taxon at a dcterms:Location.
For dwc:Occurrences, the default vocabulary is recommended to consist of _present_ and _absent_, but can be extended by
implementers with good justification.