===================================================================
RCS file: /cvs/mandoc/eqn.7,v
retrieving revision 1.7
retrieving revision 1.11
diff -u -p -r1.7 -r1.11
--- mandoc/eqn.7	2011/07/21 11:57:56	1.7
+++ mandoc/eqn.7	2011/07/21 14:13:00	1.11
@@ -1,4 +1,4 @@
-.\"	$Id: eqn.7,v 1.7 2011/07/21 11:57:56 kristaps Exp $
+.\"	$Id: eqn.7,v 1.11 2011/07/21 14:13:00 kristaps Exp $
 .\"
 .\" Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\"
@@ -63,10 +63,30 @@ The equation grammar is as follows:
 .Bd -literal -offset indent
 eqn     : box | eqn box
 box     : text
+        | { eqn }
         | DEFINE text text
         | SET text text
         | UNDEF text
+        | box pos box
+        | box mark
+        | font box
 text    : TEXT
+pos     : OVER
+        | SUP
+        | SUB
+        | TO
+        | FROM
+mark	: DOT
+        | DOTDOT
+        | HAT
+        | TILDE
+        | VEC
+        | DYAD
+        | BAR
+        | UNDER
+font    : ROMAN
+        | ITALIC
+        | BOLD
 .Ed
 .Pp
 Data in TEXT form is a non-empty sequence of non-space characters or a