+=item B<--daemon> I<address>
+
+Address of the L<rrdcached> daemon. If specified, a C<flush> command is sent
+to the server before reading the RRD files. This allows B<rrdtool> to return
+fresh data even if the daemon is configured to cache values for a long time.
+For a list of accepted formats, see the B<-l> option in the L<rrdcached> manual.
+
+ rrdtool xport --daemon unix:/var/run/rrdcached.sock ...
+
+=item B<--json>
+
+produce json formated output (instead of xml)
+
+=item B<--enumds>
+
+The generated xml should contain the data values in enumerated tags.
+
+ <v0>val</v0><v1>val</v1>
+