<md:AffiliationDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ssp="urn:x-simplesamlphp:namespace" ID="TheID" validUntil="2009-02-13T23:31:30Z" cacheDuration="PT5000S" affiliationOwnerID="https://simplesamlphp.org/idp/metadata" ssp:attr1="value1">
  <md:AffiliateMember>https://simplesamlphp.org/sp/metadata</md:AffiliateMember>
  <md:AffiliateMember>https://example.org/metadata</md:AffiliateMember>
  <md:KeyDescriptor use="signing">
    <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
      <ds:KeyName>IdentityProvider.com SSO Key</ds:KeyName>
    </ds:KeyInfo>
  </md:KeyDescriptor>
</md:AffiliationDescriptor>