Darwin Core (DwC) is a metadata standard used in biodiversity research.
http://rs.tdwg.org/dwc/terms/

The XMP schema has been implemented by Frank Bungartz of the Charles Darwin Research Station on the Galapogos Islands and has been supported in exiftool since late 2012.
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/DarwinCore.html

These packages include packages with versions and/or fixes that incorporate DwC functionality.