rpn compare operators CAN return unknown ... (#293)

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@2232 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/doc/rrdgraph_rpn.pod b/doc/rrdgraph_rpn.pod
index 9b35606b6e32e21842d7a01856ca06527398823f..8f414c773f76e149b35c1c0c354e266f5ce48937 100644 (file)
--- a/doc/rrdgraph_rpn.pod
+++ b/doc/rrdgraph_rpn.pod
@@ -50,7 +50,8 @@ B<LT, LE, GT, GE, EQ, NE>
 
 Pop two elements from the stack, compare them for the selected condition
 and return 1 for true or 0 for false. Comparing an I<unknown> or an
-I<infinite> value will always result in 0 (false).
+I<infinite> value will result in I<unknown> returned ... which will also be
+treated as false by the B<IF> call.
 
 B<UN, ISINF>