LDAP Data Interchange Format (LDIF)
http://www.l-penguin.idv.tw/article/ldap-1.htm
http://phorum.study-area.org/index.php?topic=50725.0
http://dhorrigan.com/blog/article/ldap-library-for-codeigniter
http://docs.moodle.org/en/LDAP_authentication
