. . . . . "No generic system was available, and because of the ammount of metadata records DOI's are not feasible. Therefore dedicated PID-CDI identifier solution." . . . . "2021-12-31"^^ . "2021-01-01"^^ . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCoKFb7LKlXyBB7BUvjFF9bDJNk0WxH3Xerr4H3v/VCiRVshEDl3BZVekbMMmdRe+TOPyc8AOLd9IAL2VfVVD/T0rmCHk7Pw7DQjI96mwyeXhE7f4g0WG5UT5Pxxm0Rzy7IrYnEaaVDs7dkZUt952M6qWlHfTwCQDcXJhZfLiXoMwIDAQAB" . "h9Vh/ooYp9AZ/N3IA4vBnehEJhVJvuba5f0OJk44UD8gk1ax9fkahZIEUxQN4uWET3Fs5KsXfJW+DIPdKw4ZxOkZNWmgVh1k5yzsEXIsqtdAQhRddMQ0+aqJgSuaoh+5tNUlYCObuMCikOCGw4IC1zPafBsrF61hLrtRXceVGJ8=" . . "2022-07-29T21:05:18Z"^^ . . . .