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nomenclaturalStatus (http://rs.tdwg.org/dwc/terms/nomenclaturalStatus)

@return [String]
The status related to the original publication of the name and its
conformance to the relevant rules of nomenclature. It is based
essentially on an algorithm according to the business rules of the
code. It requires no taxonomic opinion.

Recommended vocabulary: http://rs.gbif.org/vocabulary/gbif/nomenclatural_status.xml

Example: "nom. ambig.", "nom. illeg.", "nom. subnud."
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