add:

1 column 1, row 0, display step name
2 variable
3 init and quit action

xml/interface_ng.xml

@@ -41,6 +41,9 @@
 	<optional>
 	  <ref name="variable"/>
 	</optional>
+	<optional>
+	  <ref name="action"/>
+	</optional>
       </interleave>
       <zeroOrMore>
 	<ref name="widget"/>
@@ -139,6 +142,17 @@ on special cases -->
     </element>
   </define>
 
+  <define name="action">
+    <element name="action">
+      <optional>
+	<attribute name="init"/>
+      </optional>
+      <optional>
+	<attribute name="quit"/>
+      </optional>
+    </element>
+  </define>
+
   <define name="message_box">
     <element name="message_box">
       <attribute name="name"/>