. . . . . . . . . . . . "metadata - data about data" . "Crossref - one of the official Digital Object Identifier Registration Agencies of the International DOI Foundation" . "Ludo Waltman" . "Analysis of Crossref metadata - This project provides an up-to-date overview of the availability of six metad..." . "2025-07-24T12:47:57.531Z"^^ . . . . . . . "AIDA sentence: Metadata in Crossref is incomplete." . . . . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0s8+lcdcEgfA6uBE3wJW/EEG6y5dzF/k249EdZQ3teyGI1uRhSCRiuYWFUHRGdo5m/Ey99bJB4dLYBPaX5N4m4YC/4vIrUUKPuzuZsujTlhpugvv2E74X+bV+yRF7i1f7B8mosbcAYXLyUC96ZPiB0eQgAsGVikp1h+PAk9NisgX6V6b/+Yk2iwT6X+naFnPjamfIzUT7dOXdnTn8qjQroLw4FA1QXF8TzMDL0z2STIsBW6rv5HOMxYwaEmFdP5GWUMkqOnlGPinhyNS2tabl+16qedPGbvV/uKLOwz7Xdu9lzhXLtDjuOlE/Ki0mMX5IuqqLtVcZJV4lsCQrd9UwQIDAQAB" . "ZvKmk2YHUe8SBUeHuREE1VXKTtECPn17/oynkKilAL8rXh3crxbEvREyAnxGDHd5na1NsmlFxw/2KSjrugnFzZxIGRsqOcqsrs7/Qx32av7wAS1pzvgYjjw0TqclJTnzIltNcQZG3wBXR7ukGLbVzWRDrXJ8tFDraeRP8FNxslnL6s7ODGCVsJHJpFWE1fR25KoaKv6/QH3qGrBUNi+BTi0EEwZ/x/AdpErDUg+rakMTPXeaHQXhD2lr4iqC9jrMthVJ+uGUuLiovpfK9i791FmfLlu1MewAq8CtnlQBY+FC6GqlY0MgnRFb1j/WHzsnc5g96aUfjLIMO+x66oFXbw==" . . .