2026-04-26T23:31:23Z https://datacatalogue.cessda.eu/oai-pmh/v0/oai CESSDA Data Catalogue OAI-PMH Repository https://datacatalogue.cessda.eu/oai-pmh/v0/oai 2.0 support@cessda.eu 2024-01-31T08:39:15Z transient YYYY-MM-DDThh:mm:ssZ