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

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.3@2232 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/program/doc/rrdgraph_rpn.pod b/program/doc/rrdgraph_rpn.pod
index 5826c802905f04ead7cc9ca146b053335674c5e5..58c4048b57fa8ed4f449902fb6cbe71297e64888 100644 (file)
--- a/program/doc/rrdgraph_rpn.pod
+++ b/program/doc/rrdgraph_rpn.pod
@@ -51,7 +51,8 @@ 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>