+=item I<filename.xml>
+
+The (optional) filename that you want to write the XML output to.
+If not specified, the XML will be printed to stdout.
+
+=item S<[B<--no-header>|B<-n>]>
+
+In rrdtool 1.3, the dump function started producing correct xml-headers.
+Unfortunately the rrdtool restore function from the 1.2 series can not
+handle these headers. With this option you can supress the creatinon of
+the xml headers.
+