From: Tobias Oetiker <tobi@oetiker.ch>
Date: Sun, 21 May 2006 22:14:27 +0000 (+0000)
Subject: add note about variable name picking as suggested by alex
X-Git-Tag: 1.2.14~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=672d4d3cc6b542e6a768e244a644c53cf8710793;p=thirdparty%2Frrdtool-1.x.git

add note about variable name picking as suggested by alex


git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@836 a5681a0c-68f1-0310-ab6d-d61299d08faa
---

diff --git a/doc/rrdgraph_data.pod b/doc/rrdgraph_data.pod
index 64c559ab..6c8b28a1 100644
--- a/doc/rrdgraph_data.pod
+++ b/doc/rrdgraph_data.pod
@@ -22,6 +22,10 @@ own manual page.
 Variable names (I<vname>) must be made up strings of the following characters
 C<A-Z, a-z, 0-9, -,_> and a maximum length of 255 characters.
 
+When picking variable names, make sure you do not choose a name that is
+already taken by an RPN operator. A save bet it to use lowercase or
+mixedcase names for variables since operators will always be in uppercase.
+
 =head1 DEF
 
 B<DEF:>I<E<lt>vnameE<gt>>=I<E<lt>rrdfileE<gt>>:I<E<lt>ds-nameE<gt>>:I<E<lt>CFE<gt>>[:step=I<E<lt>stepE<gt>>][:start=I<E<lt>timeE<gt>>][:end=I<E<lt>timeE<gt>>][:reduce=I<E<lt>B<CF>E<gt>>]