/** The key of the configuration. e.g. l */
    String LDAP_ATTR_CITY = "ldap.attr.city";

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

    /** The key of the configuration. e.g. x121Address */
    String LDAP_ATTR_X121_ADDRESS = "ldap.attr.x121Address";