  <md:EntityDescriptor entityID="https://cern.ch/login" xsi:schemaLocation="urn:oasis:names:tc:SAML:2.0:metadata saml-schema-metadata-2.0.xsd urn:mace:shibboleth:metadata:1.0 shibboleth-metadata-1.0.xsd http://www.w3.org/2000/09/xmldsig# xmldsig-core-schema.xsd">
    <md:Extensions>
      <mdrpi:RegistrationInfo registrationAuthority="http://rr.aai.switch.ch/" registrationInstant="2014-07-29T13:17:52Z">
        <mdrpi:RegistrationPolicy xml:lang="en">https://www.switch.ch/aai/federation/switchaai/metadata-registration-practice-statement-20110711.txt</mdrpi:RegistrationPolicy>
      </mdrpi:RegistrationInfo>
      <mdattr:EntityAttributes>
        <!-- ... -->
        <saml:Attribute Name="urn:oasis:names:tc:SAML:attribute:assurance-certification" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
          <saml:AttributeValue>https://refeds.org/sirtfi2</saml:AttributeValue>
          <saml:AttributeValue>https://refeds.org/sirtfi</saml:AttributeValue>
        </saml:Attribute>
        <!-- ... -->
      </mdattr:EntityAttributes>
    </md:Extensions>