| dct_add_row | Add row(s) to a taxonomic database |
| dct_check_mapping | Check mapping of usage taxonomic IDs |
| dct_check_sci_name | Check scientificName |
| dct_check_taxon_id | Check taxonID |
| dct_check_tax_status | Check that taxonomicStatus is within valid values in Darwin Core taxonomic data |
| dct_drop_row | Drop row(s) of a taxonomic database |
| dct_fill_col | Fill a column of a taxonomic database |
| dct_filmies | Taxonomic data of filmy ferns |
| dct_modify_row | Modify row(s) of a taxonomic database |
| dct_options | Get and set function arguments via options |
| dct_terms | Darwin Core Taxon terms |
| dct_validate | Validate a taxonomic database |