diff --git a/mdx/uk/beans.xml b/mdx/uk/beans.xml
index 56d0cafe..e52e3e06 100644
--- a/mdx/uk/beans.xml
+++ b/mdx/uk/beans.xml
@@ -376,6 +376,7 @@
                 <ref bean="check_ukreg"/>
                 <ref bean="mdui_dn_en_present"/>
                 <ref bean="mdui_dn_en_match"/>
+                <ref bean="check_dup_display"/>
                 
                 <!-- failure of any check on registered metadata is fatal -->
                 <ref bean="errorTerminatingFilter"/>
diff --git a/mdx/uk/generate.xml b/mdx/uk/generate.xml
index 881b910b..c1acf412 100644
--- a/mdx/uk/generate.xml
+++ b/mdx/uk/generate.xml
@@ -351,6 +351,12 @@
         p:id="uk_productionPipeline">
         <property name="stages">
             <list>
+                <!--
+                    Enforce IdP display name uniqueness before assembling aggregate
+                -->
+                <ref bean="check_dup_display"/>
+                <ref bean="errorTerminatingFilter"/>
+                
                 <ref bean="uk_assemble"/>
                 <ref bean="stripElabNamespace"/>                
                 <ref bean="fixup_EncryptionMethod"/>
@@ -395,6 +401,12 @@
         p:id="uk_wayfPipeline">
         <property name="stages">
             <list>
+                <!--
+                    Enforce IdP display name uniqueness before assembling aggregate
+                -->
+                <ref bean="check_dup_display"/>
+                <ref bean="errorTerminatingFilter"/>
+                
                 <ref bean="uk_assemble"/>
                 <ref bean="stripElabNamespace"/>                
                 <ref bean="fixup_EncryptionMethod"/>
@@ -547,6 +559,12 @@
         p:id="CDSAllPipeline">
         <property name="stages">
             <list>
+                <!--
+                    Enforce IdP display name uniqueness before assembling aggregate
+                -->
+                <ref bean="check_dup_display"/>
+                <ref bean="errorTerminatingFilter"/>
+                
                 <!-- make an aggregate first so that we're only traversing one item -->
                 <ref bean="uk_assemble"/>
                 
@@ -605,6 +623,12 @@
         p:id="uk_fallbackPipeline">
         <property name="stages">
             <list>
+                <!--
+                    Enforce IdP display name uniqueness before assembling aggregate
+                -->
+                <ref bean="check_dup_display"/>
+                <ref bean="errorTerminatingFilter"/>
+                
                 <ref bean="uk_assemble"/>
                 <ref bean="fixup_EncryptionMethod"/>
                 <ref bean="performOtherFixups"/>
@@ -663,6 +687,12 @@
         p:id="uk_testPipeline">
         <property name="composedStages">
             <list>
+                <!--
+                    Enforce IdP display name uniqueness before assembling aggregate
+                -->
+                <ref bean="check_dup_display"/>
+                <ref bean="errorTerminatingFilter"/>
+                
                 <ref bean="uk_assemble"/>
                 <ref bean="stripElabNamespace"/>                
                 <ref bean="fixup_EncryptionMethod"/>
@@ -726,6 +756,12 @@
         p:id="uk_exportPipeline">
         <property name="stages">
             <list>
+                <!--
+                    Enforce IdP display name uniqueness before assembling aggregate
+                -->
+                <ref bean="check_dup_display"/>
+                <ref bean="errorTerminatingFilter"/>
+                
                 <ref bean="stripUkfedlabelNamespace"/>
                 <ref bean="stripWayfNamespace"/>
                 <ref bean="stripKeyNames"/>
diff --git a/mdx/validation-beans.xml b/mdx/validation-beans.xml
index 014dbc4a..921ddfd3 100644
--- a/mdx/validation-beans.xml
+++ b/mdx/validation-beans.xml
@@ -219,18 +219,6 @@
         </property>
     </bean>
     
-    <!--
-        check_aggregate
-    -->
-    <bean id="check_aggregate" parent="XSLValidationStage"
-        p:id="check_aggregate">
-        <property name="xslResource">
-            <bean parent="FilesystemResource">
-                <constructor-arg value="#{ systemProperties['rulesdir'] }/check_aggregate.xsl"/>
-            </bean>
-        </property>
-    </bean>
-    
     <!--
         check_bindings
     -->
@@ -664,6 +652,47 @@
         </property>
     </bean>
     
+    <!--
+        *******************************************************
+        ***                                                 ***
+        ***   C O L L E C T I O N   C O N S I S T E N C Y   ***
+        ***                                                 ***
+        *******************************************************
+    -->
+    
+    <!--
+        These checks are for consistency across a collection of entities
+        rather than on each entity independently.
+    -->
+    
+    <!--
+        check_aggregate
+        
+        Checks for duplicate entityID values across a set of entities.
+        
+        It is assumed that the entities are wrapped in a single EntitiesDescriptor.
+    -->
+    <bean id="check_aggregate" parent="XSLValidationStage"
+        p:id="check_aggregate">
+        <property name="xslResource">
+            <bean parent="FilesystemResource">
+                <constructor-arg value="#{ systemProperties['rulesdir'] }/check_aggregate.xsl"/>
+            </bean>
+        </property>
+    </bean>
+    
+    <!--
+        check_dup_display
+        
+        Checks for duplicate identity provider display names across a set of entities.
+        
+        It is assumed that the entities are independently represented as EntityDescriptor
+        items in the item collection.
+    -->
+    <bean id="check_dup_display" parent="stage_parent"
+        p:id="check_dup_display"
+        class="uk.org.ukfederation.mda.IdPDisplayNameDuplicateDetectingStage"/>
+    
     <!--
         *********************************************
         ***                                       ***
diff --git a/tools/ukf-mda/ukf-mda-0.7.1.jar b/tools/ukf-mda/ukf-mda-0.7.1.jar
deleted file mode 100644
index 91d46325..00000000
Binary files a/tools/ukf-mda/ukf-mda-0.7.1.jar and /dev/null differ
diff --git a/tools/ukf-mda/ukf-mda-0.7.2.jar b/tools/ukf-mda/ukf-mda-0.7.2.jar
new file mode 100644
index 00000000..8d7964d0
Binary files /dev/null and b/tools/ukf-mda/ukf-mda-0.7.2.jar differ