org-mode/etc/schema/schemas.xml

<?xml version="1.0"?>
<locatingRules xmlns="http://thaiopensource.com/ns/locating-rules/1.0">
  <namespace ns="urn:oasis:names:tc:opendocument:xmlns:office:1.0" typeId="LibreOffice"/>
  <namespace ns="urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0" typeId="LibreOffice"/>
  <namespace ns="urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0" typeId="LibreOffice"/>
  <namespace ns="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" typeId="OpenDocument Manifest"/>

  <documentElement prefix="office" typeId="OpenDocument"/>
  <documentElement prefix="manifest" localName="manifest" typeId="OpenDocument Manifest"/>
  <typeId id="LibreOffice" uri="OpenDocument-schema-v1.3+libreoffice.rnc"/>
  <typeId id="OpenDocument Manifest" uri="od-manifest-schema-v1.2-os.rnc"/>
</locatingRules>