index ca3c12840245fc8fd248bcba06b7962fc39da07b..be421e869ed467eddb602bb2ee6d0fb1412002ee 100644 (file)
--- a/program/doc/rrdgraph.pod
+++ b/program/doc/rrdgraph.pod
B<VDEF:>I<vname>B<=>I<RPN expression>
-You need at least one B<DEF> statement to generate anything. The
-other statements are useful but optional.
+You need at least one B<DEF> and one B<LINE>, B<AREA>, B<GPRINT>, B<PRINT>
+statement to generate anything useful.
+
See L<rrdgraph_data> and L<rrdgraph_rpn> for the exact format.
NOTE: B<Graph and print elements>