. . . . . "DOIs required for collections, e.g. yearly data sets." . . . . "2021-12-31"^^ . "2021-01-01"^^ . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCoKFb7LKlXyBB7BUvjFF9bDJNk0WxH3Xerr4H3v/VCiRVshEDl3BZVekbMMmdRe+TOPyc8AOLd9IAL2VfVVD/T0rmCHk7Pw7DQjI96mwyeXhE7f4g0WG5UT5Pxxm0Rzy7IrYnEaaVDs7dkZUt952M6qWlHfTwCQDcXJhZfLiXoMwIDAQAB" . "UTT3IHJnUNshwMh8LTtkYWb2w6jbgNeNfZ55VhYtSQaXHuFosCGpzJz7XEuFTLaza9XMGdfNGQBu9qzYp9qFz5zwHV4MdrPmLN1gNgQ4CZ4wAXjqJC6WSM0XatvNP4aAmzWAKZj4NZjqK+jpZmeeGb2W/ohnWMW9fU1ceG+//Lg=" . . "2022-07-20T08:31:21Z"^^ . . . .