. . . . . "DOIs required for collections, e.g. yearly data sets." . . . . "2021-12-31"^^ . "2021-01-01"^^ . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCoKFb7LKlXyBB7BUvjFF9bDJNk0WxH3Xerr4H3v/VCiRVshEDl3BZVekbMMmdRe+TOPyc8AOLd9IAL2VfVVD/T0rmCHk7Pw7DQjI96mwyeXhE7f4g0WG5UT5Pxxm0Rzy7IrYnEaaVDs7dkZUt952M6qWlHfTwCQDcXJhZfLiXoMwIDAQAB" . "dtn4A5pphEhnDfkhzP9HXpE16A59euenu/WF+QHjBjQkSRM9UTTDMOd+6D4AuvYHi6dB30ku5VHI6MUjJQ95/O59AAnfaleaRfVZa58/fjJjVpWaVJEU0cwBziXxEQahMdfHtbXd054lcPLkuHEQNdCrL5YoA1mxmxPahb32JbY=" . . "2024-01-22T18:59:23Z"^^ . . . .