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add note on variable names
[rrdtool.git]
/
doc
/
rrdgraph_data.pod
diff --git
a/doc/rrdgraph_data.pod
b/doc/rrdgraph_data.pod
index
e8b2c67
..
c57b2c3
100644
(file)
--- a/
doc/rrdgraph_data.pod
+++ b/
doc/rrdgraph_data.pod
@@
-19,6
+19,9
@@
useful information such as maximum, minimum etcetera. Two of the
instructions use a language called B<RPN> which is described in its
own manual page.
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.
+
=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>>]
=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>>]