2026-09-13T21:05:23.854074+00:00 https://www.alvin-portal.org/alvin/oai oai_dc http://www.openarchives.org/OAI/2.0/oai_dc.xsd http://www.openarchives.org/OAI/2.0/oai_dc/ alvin_xml https://www.alvin-portal.org/schema/alvin-record.xsd https://www.alvin-portal.org/vocabulary alvin_rdf https://www.openarchives.org/OAI/2.0/rdf.xsd http://www.w3.org/1999/02/22-rdf-syntax-ns#