diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 454ebdbaf9..63ba7d1007 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -498,62 +498,6 @@
         </element>
       </optional>
 
-      <!-- The Blkio cgroup related tunables would go in the blkiotune -->
-      <optional>
-        <element name="blkiotune">
-          <interleave>
-            <!-- I/O weight the VM can use -->
-            <optional>
-              <element name="weight">
-                <ref name="weight"/>
-              </element>
-            </optional>
-            <zeroOrMore>
-              <element name="device">
-                <interleave>
-                  <element name="path">
-                    <ref name="absFilePath"/>
-                  </element>
-                  <element name="weight">
-                    <ref name="weight"/>
-                  </element>
-                </interleave>
-              </element>
-            </zeroOrMore>
-          </interleave>
-        </element>
-      </optional>
-
-      <!-- All the memory/swap related tunables would go in the memtune -->
-      <optional>
-        <element name="memtune">
-          <!-- Maximum memory the VM can use -->
-          <optional>
-            <element name="hard_limit">
-              <ref name='scaledInteger'/>
-            </element>
-          </optional>
-          <!-- Minimum memory ascertained for the VM during contention -->
-          <optional>
-            <element name="soft_limit">
-              <ref name='scaledInteger'/>
-            </element>
-          </optional>
-          <!-- Minimum amount of memory required to start the VM -->
-          <optional>
-            <element name="min_guarantee">
-              <ref name='scaledInteger'/>
-            </element>
-          </optional>
-          <!-- Maximum swap area the VM can use -->
-          <optional>
-            <element name="swap_hard_limit">
-              <ref name='scaledInteger'/>
-            </element>
-          </optional>
-        </element>
-      </optional>
-
       <optional>
         <element name="vcpu">
           <optional>
@@ -578,91 +522,164 @@
         </element>
       </optional>
 
-      <!-- All the cpu related tunables would go in the cputune -->
       <optional>
-        <element name="cputune">
-          <optional>
-            <element name="shares">
-              <ref name="cpushares"/>
-            </element>
-          </optional>
-          <optional>
-            <element name="period">
-              <ref name="cpuperiod"/>
-            </element>
-          </optional>
-          <optional>
-            <element name="quota">
-              <ref name="cpuquota"/>
-            </element>
-          </optional>
-          <optional>
-            <element name="emulator_period">
-              <ref name="cpuperiod"/>
-            </element>
-          </optional>
-          <optional>
-            <element name="emulator_quota">
-              <ref name="cpuquota"/>
-            </element>
-          </optional>
-          <zeroOrMore>
-            <element name="vcpupin">
-              <attribute name="vcpu">
-                <ref name="vcpuid"/>
-              </attribute>
-              <attribute name="cpuset">
-                <ref name="cpuset"/>
-              </attribute>
-            </element>
-          </zeroOrMore>
-          <optional>
-            <element name="emulatorpin">
-              <attribute name="cpuset">
-                <ref name="cpuset"/>
-              </attribute>
-            </element>
-          </optional>
-        </element>
+        <ref name="blkiotune"/>
       </optional>
 
-      <!-- All the NUMA related tunables would go in the numatune -->
       <optional>
-        <element name="numatune">
-          <optional>
-            <element name="memory">
-              <optional>
-                <attribute name="mode">
-                  <choice>
-                    <value>strict</value>
-                    <value>preferred</value>
-                    <value>interleave</value>
-                  </choice>
-                </attribute>
-              </optional>
-              <choice>
-                <group>
-                  <optional>
-                    <attribute name='placement'>
-                      <value>static</value>
-                    </attribute>
-                  </optional>
-                  <optional>
-                    <attribute name='nodeset'>
-                      <ref name='cpuset'/>
-                    </attribute>
-                  </optional>
-                </group>
-                <attribute name='placement'>
-                  <value>auto</value>
-                </attribute>
-              </choice>
-            </element>
-          </optional>
-        </element>
+        <ref name="memtune"/>
+      </optional>
+
+      <optional>
+        <ref name="cputune"/>
+      </optional>
+
+      <optional>
+        <ref name="numatune"/>
       </optional>
     </interleave>
   </define>
+
+  <!-- The Blkio cgroup related tunables would go in the blkiotune -->
+  <define name="blkiotune">
+    <element name="blkiotune">
+      <interleave>
+        <!-- I/O weight the VM can use -->
+        <optional>
+          <element name="weight">
+            <ref name="weight"/>
+          </element>
+        </optional>
+        <zeroOrMore>
+          <element name="device">
+            <interleave>
+              <element name="path">
+                <ref name="absFilePath"/>
+              </element>
+              <element name="weight">
+                <ref name="weight"/>
+              </element>
+            </interleave>
+          </element>
+        </zeroOrMore>
+      </interleave>
+    </element>
+  </define>
+
+  <!-- All the memory/swap related tunables would go in the memtune -->
+  <define name="memtune">
+    <element name="memtune">
+      <!-- Maximum memory the VM can use -->
+      <optional>
+        <element name="hard_limit">
+          <ref name='scaledInteger'/>
+        </element>
+      </optional>
+      <!-- Minimum memory ascertained for the VM during contention -->
+      <optional>
+        <element name="soft_limit">
+          <ref name='scaledInteger'/>
+        </element>
+      </optional>
+      <!-- Minimum amount of memory required to start the VM -->
+      <optional>
+        <element name="min_guarantee">
+          <ref name='scaledInteger'/>
+        </element>
+      </optional>
+      <!-- Maximum swap area the VM can use -->
+      <optional>
+        <element name="swap_hard_limit">
+          <ref name='scaledInteger'/>
+        </element>
+      </optional>
+    </element>
+  </define>
+
+  <!-- All the cpu related tunables would go in the cputune -->
+  <define name="cputune">
+    <element name="cputune">
+      <optional>
+        <element name="shares">
+          <ref name="cpushares"/>
+        </element>
+      </optional>
+      <optional>
+        <element name="period">
+          <ref name="cpuperiod"/>
+        </element>
+      </optional>
+      <optional>
+        <element name="quota">
+          <ref name="cpuquota"/>
+        </element>
+      </optional>
+      <optional>
+        <element name="emulator_period">
+          <ref name="cpuperiod"/>
+        </element>
+      </optional>
+      <optional>
+        <element name="emulator_quota">
+          <ref name="cpuquota"/>
+        </element>
+      </optional>
+      <zeroOrMore>
+        <element name="vcpupin">
+          <attribute name="vcpu">
+            <ref name="vcpuid"/>
+          </attribute>
+          <attribute name="cpuset">
+            <ref name="cpuset"/>
+          </attribute>
+        </element>
+      </zeroOrMore>
+      <optional>
+        <element name="emulatorpin">
+          <attribute name="cpuset">
+            <ref name="cpuset"/>
+          </attribute>
+        </element>
+      </optional>
+    </element>
+  </define>
+
+  <!-- All the NUMA related tunables would go in the numatune -->
+  <define name="numatune">
+    <element name="numatune">
+      <optional>
+        <element name="memory">
+          <optional>
+            <attribute name="mode">
+              <choice>
+                <value>strict</value>
+                <value>preferred</value>
+                <value>interleave</value>
+              </choice>
+            </attribute>
+          </optional>
+          <choice>
+            <group>
+              <optional>
+                <attribute name='placement'>
+                  <value>static</value>
+                </attribute>
+              </optional>
+              <optional>
+                <attribute name='nodeset'>
+                  <ref name='cpuset'/>
+                </attribute>
+              </optional>
+            </group>
+            <attribute name='placement'>
+              <value>auto</value>
+            </attribute>
+              </choice>
+        </element>
+      </optional>
+    </element>
+  </define>
+
   <define name="clock">
     <optional>
       <element name="clock">