Index: rules/base.o_s.part
===================================================================
RCS file: /cvs/xlibs/xkbdesc/rules/base.o_s.part,v
retrieving revision 1.19
diff -u -r1.19 base.o_s.part
--- rules/base.o_s.part	12 Nov 2006 20:09:47 -0000	1.19
+++ rules/base.o_s.part	18 Nov 2006 02:08:49 -0000
@@ -34,6 +34,7 @@
   lv3:switch		=	+level3(switch)
   lv3:ralt_switch	=	+level3(ralt_switch)
   lv3:ralt_switch_multikey	=	+level3(ralt_switch_multikey)
+  lv3:ralt_alt		=	+level3(ralt_alt)
   lv3:lalt_switch	=	+level3(lalt_switch)
   lv3:alt_switch	=	+level3(alt_switch)
   lv3:menu_switch	=	+level3(menu_switch)
Index: rules/base.xml.in
===================================================================
RCS file: /cvs/xlibs/xkbdesc/rules/base.xml.in,v
retrieving revision 1.167
diff -u -r1.167 base.xml.in
--- rules/base.xml.in	12 Nov 2006 20:09:47 -0000	1.167
+++ rules/base.xml.in	18 Nov 2006 02:08:51 -0000
@@ -3163,6 +3163,12 @@
           <_description>Press Right Alt key to choose 3rd level, Shift+Right Alt key is Multi_Key.</_description>
         </configItem>
       </option>
+      <option>
+        <configItem>
+          <name>lv3:ralt_alt</name>
+          <_description>Right Alt key never chooses 3rd level.</_description>
+        </configItem>
+      </option>
     </group>
     <group allowMultipleSelection="false">
       <!-- Tweaking the position of the "Ctrl" key -->
Index: rules/sun.xml.in
===================================================================
RCS file: /cvs/xlibs/xkbdesc/rules/sun.xml.in,v
retrieving revision 1.1
diff -u -r1.1 sun.xml.in
--- rules/sun.xml.in	6 Nov 2006 21:01:25 -0000	1.1
+++ rules/sun.xml.in	18 Nov 2006 02:08:52 -0000
@@ -807,6 +807,12 @@
           <_description>Press Right Alt-key to choose 3rd level, Shift+Right Alt-key is Multi_Key</_description>
         </configItem>
       </option>
+      <option>
+        <configItem>
+          <name>lv3:ralt_alt</name>
+          <_description>Right Alt key never chooses 3rd level.</_description>
+        </configItem>
+      </option>
     </group>
     <group allowMultipleSelection="false">
       <configItem>
Index: symbols/level3
===================================================================
RCS file: /cvs/xlibs/xkbdesc/symbols/level3,v
retrieving revision 1.15
diff -u -r1.15 level3
--- symbols/level3	16 Oct 2006 20:17:16 -0000	1.15
+++ symbols/level3	18 Nov 2006 02:08:52 -0000
@@ -17,6 +17,25 @@
   modifier_map Mod5   { ISO_Level3_Shift };
 };
 
+// Right Alt key never chooses 3rd level.
+// This option attempts to undo the effect of a layout's
+// including ralt_switch.  You may also want to select another
+// level3 option that maps the level3 shift to some other key.
+partial modifier_keys
+xkb_symbols "ralt_alt" {
+  key <RALT> { 
+    type[Group1]="TWO_LEVEL",
+    type[Group2]="TWO_LEVEL",
+    type[Group3]="TWO_LEVEL",
+    type[Group4]="TWO_LEVEL",
+    symbols[Group1] = [ Alt_R, Meta_R ], 
+    symbols[Group2] = [ Alt_R, Meta_R ], 
+    symbols[Group3] = [ Alt_R, Meta_R ], 
+    symbols[Group4] = [ Alt_R, Meta_R ]
+    };
+  modifier_map Mod1    { <RALT> };
+};
+
 partial modifier_keys
 xkb_symbols "ralt_switch_multikey" {
   key <RALT> {