$metadata['https://engine.surfconext.nl/authentication/sp/metadata'] = [
  'AssertionConsumerService' =>  'https://engine.surfconext.nl/authentication/sp/consume-assertion',
  'authproc' => [
    /* add schacHomeOrganization attribute */
    10 => [
      'class' => 'core:AttributeAdd',
      'schacHomeOrganization' => 'university.example.org',
    ],
    80 => [
      'class' => 'core:ScopeAttribute',
      'scopeAttribute' => 'schacHomeOrganization',
      'sourceAttribute' => 'eduPersonAffiliation',
      'targetAttribute' => 'eduPersonScopedAffiliation',
    ],
    /* add the 'urn' prefix to all supported attributes (if available from authentication source) */
    90 => [
      'class' => 'core:AttributeMap',
      'uid'                    => 'urn:mace:dir:attribute-def:uid',
      'sn'                     => 'urn:mace:dir:attribute-def:sn',
      'givenName'              => 'urn:mace:dir:attribute-def:givenName',
      'cn'                     => 'urn:mace:dir:attribute-def:cn',
      'displayName'            => 'urn:mace:dir:attribute-def:displayName',
      'mail'                   => 'urn:mace:dir:attribute-def:mail',
      'eduPersonPrincipalName' => 'urn:mace:dir:attribute-def:eduPersonPrincipalName',
      'eduPersonEntitlement'   => 'urn:mace:dir:attribute-def:eduPersonEntitlement',
      'eduPersonAffiliation'   => 'urn:mace:dir:attribute-def:eduPersonAffiliation',
      'eduPersonScopedAffiliation' => 'urn:mace:dir:attribute-def:eduPersonScopedAffiliation',
      'schacHomeOrganization'  => 'urn:mace:terena.org:attribute-def:schacHomeOrganization',
    ],
  ],
];