/** The key of the configuration. e.g. preferredLanguage */
    String LDAP_ATTR_PREFERRED_LANGUAGE = "ldap.attr.preferredLanguage";

    /** The key of the configuration. e.g. departmentNumber */
    String LDAP_ATTR_DEPARTMENT_NUMBER = "ldap.attr.departmentNumber";

    /** The key of the configuration. e.g. uidNumber */
    String LDAP_ATTR_UID_NUMBER = "ldap.attr.uidNumber";