ERROR: This XML is NOT VALID:

WARNING: Warning: schema_reference.4: Failed to read schema document 'http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>. (first warning reported only)
NOT VALID: Error: cvc-elt.1.a: Cannot find the declaration of element 'OAI-PMH'.

---

<?xml  version="1.0"  encoding="UTF-8"  ?>

<OAI-PMH  xmlns="http://www.openarchives.org/OAI/2.0/"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/
  http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd">
<responseDate>2025-09-18T06:47:09Z</responseDate>
<request  verb="ListIdentifiers"  metadataPrefix="iso19139">http://ebas-oai-pmh.nilu.no/oai/provider</request>
        <error  code="cannotDisseminateFormat">This  repository  has  no  items  available  in  format  'iso19139'</error>

</OAI-PMH>