===================================================================
RCS file: /cvs/mandoc/eqn.7,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -p -r1.3 -r1.4
--- mandoc/eqn.7	2011/07/17 14:08:49	1.3
+++ mandoc/eqn.7	2011/07/18 13:47:38	1.4
@@ -1,4 +1,4 @@
-.\"	$Id: eqn.7,v 1.3 2011/07/17 14:08:49 kristaps Exp $
+.\"	$Id: eqn.7,v 1.4 2011/07/18 13:47:38 kristaps Exp $
 .\"
 .\" Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: July 17 2011 $
+.Dd $Mdocdate: July 18 2011 $
 .Dt EQN 7
 .Os
 .Sh NAME
@@ -90,8 +90,12 @@ Note that a quoted
 causes errors in some
 .Nm
 implementations and should not be considered portable.
+Definitions may refer to other definitions; these are evaluated
+recursively when text replacement occurs and not when the definition is
+created.
+Self-referencing definitions will raise an error.
 .It Cm set
-Set an equation mode.  
+Set an equation mode.
 Both arguments are thrown away.
 .It Cm undef
 Unset a previously-defined key.