Update info files

diff --git a/doc/info/lang.html b/doc/info/lang.html
index f721481e2071a59e0595c373fae1b76d0d468a13..5fc588bf929a93b18ca2f51846512ac1b92ba778 100644 (file)
--- a/doc/info/lang.html
+++ b/doc/info/lang.html
@@ -116,6 +116,8 @@ Vertical bars | separate alternatives.
 <P>
 The keywords <B>node</B>, <B>edge</B>, <B>graph</B>, <B>digraph</B>,
 <B>subgraph</B>, and <B>strict</B> are case-independent.
+Note also that the allowed compass point values are not keywords, so
+these strings can be used elsewhere as ordinary identifiers.
 <P>
 An <I>ID</I> is one of the following: 
 <MENU>