dryad_dataset           Get datasets by DOI(s)
dryad_dataset_versions
                        Get dataset versions by DOI(s)
dryad_datasets          List datasets
dryad_download          dryad_download
dryad_files             Get metadata information about a file
dryad_files_download    Download a specific file
rdryad-package          Interface to the Dryad Web services
versions                Get a dataset version by version ID
