X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;ds=sidebyside;f=doc%2Frrdgraph_data.pod;h=04d976174b4a679cf0eac31a2589d99f6d3e3e6e;hb=e9fb580fcf041573054e5bcf2184fa7811f9dd59;hp=c57b2c356d04c35527d7a8ffe4160c0f2c4e3fec;hpb=9b3f8a096b6202b9bd580586476660933c7f913f;p=rrdtool.git

diff --git a/doc/rrdgraph_data.pod b/doc/rrdgraph_data.pod
index c57b2c3..04d9761 100644
--- a/doc/rrdgraph_data.pod
+++ b/doc/rrdgraph_data.pod
@@ -20,7 +20,7 @@ instructions use a language called B<RPN> which is described in its
 own manual page.
 
 Variable names (I<vname>) must be made up strings of the following characters
-C<A-Z, a-z, 0-9, -,_> with a maximum length of 255 characters.
+C<A-Z, a-z, 0-9, -,_> and a maximum length of 255 characters.
 
 =head1 DEF
 
@@ -71,6 +71,9 @@ elements.
 
 Example: C<VDEF:avg=mydata,AVERAGE>
 
+Note that currently only agregation functions work in VDEF rpn expressions.
+Patches to change this are welcome.
+
 =head1 CDEF
 
 B<CDEF>:I<vname>=I<RPN expression>