2026-05-16T12:51:41Z https://www.tethys.at/oai oai_dc http://www.openarchives.org/OAI/2.0/oai_dc.xsd http://www.openarchives.org/OAI/2.0/oai_dc/ oai_datacite http://schema.datacite.org/meta/kernel-4.3/metadata.xsd http://datacite.org/schema/kernel-4 iso19139 http://www.isotc211.org/2005/gmd/gmd.xsd http://www.isotc211.org/2005/gmd