diff --git a/xml/constraints-3.0.rng b/xml/constraints-3.0.rng
index 3698814e2f..11f4a0f9c9 100644
--- a/xml/constraints-3.0.rng
+++ b/xml/constraints-3.0.rng
@@ -1,251 +1,256 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <grammar xmlns="http://relaxng.org/ns/structure/1.0" 
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
   <start>
       <ref name="element-constraints"/>
   </start>
 
   <define name="element-constraints">
     <element name="constraints">
       <zeroOrMore>
         <choice>
           <ref name="element-location"/>
           <ref name="element-colocation"/>
           <ref name="element-order"/>
           <ref name="element-rsc_ticket"/>
         </choice>
       </zeroOrMore>
     </element>
   </define>
 
   <define name="element-location">
     <element name="rsc_location">
       <attribute name="id"><data type="ID"/></attribute>
       <choice>
         <group>
           <choice>
             <attribute name="rsc"><data type="IDREF"/></attribute>
             <attribute name="rsc-pattern"><text/></attribute>
           </choice>
           <optional>
             <attribute name="role">
               <ref name="attribute-roles"/>
             </attribute>
           </optional>
         </group>
         <oneOrMore>
           <ref name="element-resource-set"/>
         </oneOrMore>
       </choice>
       <choice>
         <group>
           <externalRef href="score.rng"/>
           <attribute name="node"><text/></attribute>
         </group>
         <oneOrMore>
           <externalRef href="rule-2.9.rng"/>
         </oneOrMore>
       </choice>
       <optional>
         <ref name="element-lifetime"/>
       </optional>
       <optional>
         <attribute name="resource-discovery">
           <ref name="attribute-discovery"/>
         </attribute>
       </optional>
     </element>
   </define>
 
   <define name="element-resource-set">
     <element name="resource_set">
       <choice>
         <attribute name="id-ref"><data type="IDREF"/></attribute>
         <group>
           <attribute name="id"><data type="ID"/></attribute>
           <optional>
             <attribute name="sequential"><data type="boolean"/></attribute>
           </optional>
           <optional>
             <attribute name="require-all"><data type="boolean"/></attribute>
           </optional>
           <optional>
             <attribute name="ordering">
               <choice>
                 <value>group</value>
                 <value>listed</value>
               </choice>
             </attribute>
           </optional>
           <optional>
             <attribute name="action">
               <ref name="attribute-actions"/>
             </attribute>
           </optional>
           <optional>
             <attribute name="role">
               <ref name="attribute-roles"/>
             </attribute>
           </optional>
           <optional>
-            <externalRef href="score.rng"/>
+            <choice>
+              <externalRef href="score.rng"/>
+              <attribute name="kind">
+                <ref name="order-types"/>
+              </attribute>
+             </choice>
           </optional>
           <oneOrMore>
             <element name="resource_ref">
               <attribute name="id"><data type="IDREF"/></attribute>
             </element>
           </oneOrMore>
         </group>
       </choice>
     </element>
   </define>
 
   <define name="element-colocation">
     <element name="rsc_colocation">
       <attribute name="id"><data type="ID"/></attribute>
       <optional>
         <externalRef href="score.rng"/>
       </optional>
       <optional>
         <ref name="element-lifetime"/>
       </optional>
       <choice>
         <oneOrMore>
           <ref name="element-resource-set"/>
         </oneOrMore>
         <group>
           <attribute name="rsc"><data type="IDREF"/></attribute>
           <attribute name="with-rsc"><data type="IDREF"/></attribute>
           <optional>
             <attribute name="node-attribute"><text/></attribute>
           </optional>
           <optional>
             <attribute name="rsc-role">
               <ref name="attribute-roles"/>
             </attribute>
           </optional>
           <optional>
             <attribute name="with-rsc-role">
               <ref name="attribute-roles"/>
             </attribute>
           </optional>
         </group>
       </choice>
     </element>
   </define>
 
   <define name="element-order">
     <element name="rsc_order">
       <attribute name="id"><data type="ID"/></attribute>
       <optional>
         <ref name="element-lifetime"/>
       </optional>
       <optional>
         <attribute name="symmetrical"><data type="boolean"/></attribute>
       </optional>
       <optional>
         <attribute name="require-all"><data type="boolean"/></attribute>
       </optional>
       <optional>
         <choice>
           <externalRef href="score.rng"/>
           <attribute name="kind">
             <ref name="order-types"/>
           </attribute>
         </choice>
       </optional>
       <choice>
         <oneOrMore>
           <ref name="element-resource-set"/>
         </oneOrMore>
         <group>
           <attribute name="first"><data type="IDREF"/></attribute>
           <attribute name="then"><data type="IDREF"/></attribute>
           <optional>
             <attribute name="first-action">
               <ref name="attribute-actions"/>
             </attribute>
           </optional>
           <optional>
             <attribute name="then-action">
               <ref name="attribute-actions"/>
             </attribute>
           </optional>
         </group>
       </choice>
     </element>
   </define>
  
   <define name="element-rsc_ticket">
     <element name="rsc_ticket">
       <attribute name="id"><data type="ID"/></attribute>
       <choice>
         <oneOrMore>
           <ref name="element-resource-set"/>
         </oneOrMore>
         <group>
           <attribute name="rsc"><data type="IDREF"/></attribute>
           <optional>
             <attribute name="rsc-role">
               <ref name="attribute-roles"/>
             </attribute>
           </optional>
         </group>
       </choice>
       <attribute name="ticket"><text/></attribute>
       <optional>
         <attribute name="loss-policy">
           <choice>
             <value>stop</value>
             <value>demote</value>
             <value>fence</value>
             <value>freeze</value>
           </choice>
         </attribute>
       </optional>
     </element>
   </define>
 
   <define name="attribute-discovery">
     <choice>
       <value>always</value>
       <value>never</value>
       <value>exclusive</value>
     </choice>
   </define>
 
   <define name="attribute-actions">
     <choice>
       <value>start</value>
       <value>promote</value>
       <value>demote</value>
       <value>stop</value>
     </choice>
   </define>
       
   <define name="attribute-roles">
     <choice>
       <value>Stopped</value>
       <value>Started</value>
       <value>Master</value>
       <value>Slave</value>
     </choice>
   </define>
 
   <define name="order-types">
     <choice>
       <value>Optional</value>
       <value>Mandatory</value>
       <value>Serialize</value>
     </choice>
   </define>
 
   <define name="element-lifetime">
     <element name="lifetime">
       <oneOrMore>
         <externalRef href="rule-2.9.rng"/>
       </oneOrMore>
     </element>
   </define>
   
 </grammar>