{'': {'pick': 'unique'},
 'CN': {'filters': ['keep_ldap'], 'pick': 'first'},
 'EDUPERSONPRINCIPALNAME': {'pick': 'last'},
 'MAIL': {'filters': ['keep_ldap'],
          'order': '${dataset__source}',
          'pick': 'first'},
 'MAILNICKNAME': {'filters': ['keep_ldap'],
                  'order': '${dataset__source}',
                  'pick': 'first'},
 'MSEXCHRECIPIENTDISPLAYTYPE': {'filters': ['keep_ldap'], 'pick': 'first'},
 'MSEXCHRECIPIENTTYPEDETAILS': {'filters': ['keep_ldap'], 'pick': 'first'},
 'MSEXCHREMOTERECIPIENTCONTROL': {'filters': ['keep_ldap'], 'pick': 'first'},
 'MSEXCHREMOTERECIPIENTTYPE': {'filters': ['keep_ldap'], 'pick': 'first'},
 'MSEXCHUSERACCOUNTCONTROL': {'filters': ['keep_ldap'], 'pick': 'first'},
 'NAME': {'filters': ['keep_ldap'], 'pick': 'first'},
 'OBJECTCATEGORY': {'filters': ['keep_ldap'], 'pick': 'unique'},
 'PHYSICALDELIVERYOFFICENAME': {'order': '${dataset__source}', 'pick': 'last'},
 'PROXYADDRESSES': {'filters': ['keep_ldap'], 'pick': 'distinct'},
 'SAMACCOUNTNAME': {'filters': ['keep_ldap'], 'pick': 'first'},
 'SCHACEXPIRYDATE': {'order': '${account_expires_iso}', 'pick': 'first'},
 'TARGETADDRESS': {'filters': ['keep_ldap'],
                   'order': '${dataset__source}',
                   'pick': 'first'},
 'TELEPHONENUMBER': {'order': '${dataset__source}', 'pick': 'first'},
 'USERPRINCIPALNAME': {'filters': ['keep_ldap'], 'pick': 'first'}}