. . . . . "DOIs required for collections, e.g. yearly data sets." . . . . "2021-12-31"^^ . "2021-01-01"^^ . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCoKFb7LKlXyBB7BUvjFF9bDJNk0WxH3Xerr4H3v/VCiRVshEDl3BZVekbMMmdRe+TOPyc8AOLd9IAL2VfVVD/T0rmCHk7Pw7DQjI96mwyeXhE7f4g0WG5UT5Pxxm0Rzy7IrYnEaaVDs7dkZUt952M6qWlHfTwCQDcXJhZfLiXoMwIDAQAB" . "QX1CKdTr6LetuqdT4V9nmbdKqpwCtbW/WhjtqfSb3c5IrysiEIVMRbwv/L0AN8sXuLz2dfI106hBon8UMUJQsqyGZBgiUopjE3G6XyxAk4aE5y7IFs77d2NK0/mwJzr6M2AAlaX68Yf1Nh7NURPfGMs8b9xOLQj39tZsr71d3Ns=" . . "2023-04-25T02:39:27Z"^^ . . . .