something like this maybe

data/rc.xsd

@@ -26,6 +26,8 @@
          fix some capitalization
      Mon Sep 22 14:08:16 EDT 2003 - xor(a)orodu.net
          update hideTimeout to hideDelay
+     Thu Apr 22 12:33:11 UTC 2004 - mikachu(a)openbox.org
+         add diffs between 3.1 and 3.2
 -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
     targetNamespace="http://openbox.org/"
@@ -89,6 +91,7 @@
         <xs:sequence>
             <xs:element name="name" type="xs:string"/>
             <xs:element name="titlelayout" type="xs:string"/>
+            <xs:element name="keepBorder" type="ob:yesorno"/>
         </xs:sequence>
     </xs:complexType>
     <xs:complexType name="desktops">
@@ -107,6 +110,8 @@
     <xs:complexType name="resize">
         <xs:sequence>
             <xs:element name="drawContents" type="ob:yesorno"/>
+            <xs:element name="popupShow" type="ob:popupshow"/>
+            <xs:element name="popupPosition" type="ob:popupposition"/>
         </xs:sequence>
     </xs:complexType>
     <xs:complexType name="dock">
@@ -166,6 +171,8 @@
     <xs:complexType name="menu">
         <xs:sequence>
             <xs:element maxOccurs="unbounded" name="file" type="xs:string"/>
+            <xs:element name="warpPointer" type="ob:yesorno"/>
+            <xs:element name="xorStyle" type="ob:yesorno"/>
         </xs:sequence>
     </xs:complexType>
     <!--
@@ -183,6 +190,19 @@
             <xs:enumeration value="UnderMouse"/>
         </xs:restriction>
     </xs:simpleType>
+    <xs:simpleType name="popupshow">
+        <xs:restriction base="xs:string">
+            <xs:enumeration value="Always"/>
+            <xs:enumeration value="Never"/>
+            <xs:enumeration value="Nonpixel"/>
+        </xs:restriction>
+    </xs:simpleType>
+    <xs:simpleType name="popupposition">
+        <xs:restriction base="xs:string">
+            <xs:enumeration value="Top"/>
+            <xs:enumeration value="Center"/>
+        </xs:restriction>
+    </xs:simpleType>
     <xs:simpleType name="position">
         <xs:restriction base="xs:string">
             <xs:enumeration value="TopLeft"/>