def generate_dwca
      DwcaHunter.logger_write(object_id, "Creating DarwinCore Archive file")
      @core = [["http://rs.tdwg.org/dwc/terms/taxonID",
                "http://rs.tdwg.org/dwc/terms/scientificName",
                "http://rs.tdwg.org/dwc/terms/kingdom",