diff --git a/pom.xml b/pom.xml
index fd0db53642..5ef44dfdb2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -53,7 +53,7 @@
         <dependency.activiti.version>5.23.0</dependency.activiti.version>
         <dependency.alfresco-transform-model.version>1.4.0</dependency.alfresco-transform-model.version>
         <dependency.alfresco-greenmail.version>6.2</dependency.alfresco-greenmail.version>
-        <dependency.acs-event-model.version>0.0.12</dependency.acs-event-model.version>
+        <dependency.acs-event-model.version>0.0.13</dependency.acs-event-model.version>
 
         <dependency.spring.version>5.3.9</dependency.spring.version>
         <dependency.antlr.version>3.5.2</dependency.antlr.version>
diff --git a/repository/src/main/java/org/alfresco/repo/event2/ChildAssociationEventConsolidator.java b/repository/src/main/java/org/alfresco/repo/event2/ChildAssociationEventConsolidator.java
index 8837f3648e..d09833b74e 100644
--- a/repository/src/main/java/org/alfresco/repo/event2/ChildAssociationEventConsolidator.java
+++ b/repository/src/main/java/org/alfresco/repo/event2/ChildAssociationEventConsolidator.java
@@ -27,7 +27,6 @@ package org.alfresco.repo.event2;
 
 import java.util.ArrayDeque;
 import java.util.Deque;
-
 import org.alfresco.repo.event.v1.model.ChildAssociationResource;
 import org.alfresco.repo.event.v1.model.DataAttributes;
 import org.alfresco.repo.event.v1.model.EventData;
@@ -117,8 +116,9 @@ public class ChildAssociationEventConsolidator implements ChildAssociationEventS
     {
         String parentId = childAssociationRef.getParentRef().getId();
         String childId = childAssociationRef.getChildRef().getId();
+        String assocQName = helper.getQNamePrefixString(childAssociationRef.getQName());
         String assocType = helper.getQNamePrefixString(childAssociationRef.getTypeQName());
-        return new ChildAssociationResource(parentId, childId, assocType);
+        return new ChildAssociationResource(parentId, childId, assocType, assocQName);
     }
 
     /**
diff --git a/repository/src/main/java/org/alfresco/repo/event2/NodeResourceHelper.java b/repository/src/main/java/org/alfresco/repo/event2/NodeResourceHelper.java
index 7ce7e40d21..9212f2a1b8 100644
--- a/repository/src/main/java/org/alfresco/repo/event2/NodeResourceHelper.java
+++ b/repository/src/main/java/org/alfresco/repo/event2/NodeResourceHelper.java
@@ -46,6 +46,7 @@ import org.alfresco.repo.event2.filter.NodePropertyFilter;
 import org.alfresco.repo.security.authentication.AuthenticationUtil;
 import org.alfresco.repo.security.permissions.AccessDeniedException;
 import org.alfresco.service.cmr.dictionary.DictionaryService;
+import org.alfresco.service.cmr.repository.ChildAssociationRef;
 import org.alfresco.service.cmr.repository.ContentData;
 import org.alfresco.service.cmr.repository.MLText;
 import org.alfresco.service.cmr.repository.NodeRef;
@@ -148,6 +149,7 @@ public class NodeResourceHelper implements InitializingBean
                            .setModifiedByUser(getUserInfo((String) properties.get(ContentModel.PROP_MODIFIER), mapUserCache))
                            .setModifiedAt(getZonedDateTime((Date)properties.get(ContentModel.PROP_MODIFIED)))
                            .setContent(getContentInfo(properties))
+                           .setPrimaryAssocQName(getPrimaryAssocQName(nodeRef))
                            .setPrimaryHierarchy(PathUtil.getNodeIdsInReverse(path, false))
                            .setProperties(mapToNodeProperties(properties))
                            .setAspectNames(getMappedAspects(nodeRef));
@@ -158,6 +160,23 @@ public class NodeResourceHelper implements InitializingBean
         return dictionaryService.isSubClass(className, ofClassQName);
     }
 
+    private String getPrimaryAssocQName(NodeRef nodeRef) 
+    {
+        String result = null;
+        try 
+        {
+            ChildAssociationRef primaryParent = nodeService.getPrimaryParent(nodeRef);
+            if(primaryParent != null && primaryParent.getQName() != null) 
+            {
+                result = primaryParent.getQName().getPrefixedQName(namespaceService).getPrefixString();
+            }
+        } catch (NamespaceException namespaceException) 
+        {
+            LOGGER.error("Cannot return a valid primary association QName: " + namespaceException.getMessage());
+        }
+        return result;
+    }
+
     private UserInfo getUserInfo(String userName, Map<String, UserInfo> mapUserCache)
     {
         UserInfo userInfo = mapUserCache.get(userName);
diff --git a/repository/src/test/java/org/alfresco/repo/event2/AbstractContextAwareRepoEvent.java b/repository/src/test/java/org/alfresco/repo/event2/AbstractContextAwareRepoEvent.java
index c5f3f9248f..995bec4cfe 100644
--- a/repository/src/test/java/org/alfresco/repo/event2/AbstractContextAwareRepoEvent.java
+++ b/repository/src/test/java/org/alfresco/repo/event2/AbstractContextAwareRepoEvent.java
@@ -36,6 +36,7 @@ import java.util.List;
 import javax.jms.ConnectionFactory;
 
 import org.alfresco.model.ContentModel;
+import org.alfresco.repo.dictionary.NamespaceDAO;
 import org.alfresco.repo.event.v1.model.ChildAssociationResource;
 import org.alfresco.repo.event.v1.model.DataAttributes;
 import org.alfresco.repo.event.v1.model.EventType;
@@ -114,6 +115,9 @@ public abstract class AbstractContextAwareRepoEvent extends BaseSpringTest
     @Qualifier("eventGeneratorQueue")
     protected EventGeneratorQueue eventQueue;
 
+    @Autowired
+    private NamespaceDAO namespaceDAO;
+
     protected NodeRef rootNodeRef;
 
     @BeforeClass
@@ -152,9 +156,19 @@ public abstract class AbstractContextAwareRepoEvent extends BaseSpringTest
             return nodeService.getRootNode(storeRef);
         });
 
+        initTestNamespacePrefixMapping();
+
         flushSpuriousEvents();
     }
 
+    protected void initTestNamespacePrefixMapping() {
+        if(namespaceDAO.getNamespaceURI("ce") == null)
+        {
+            namespaceDAO.addURI(TEST_NAMESPACE);
+            namespaceDAO.addPrefix("ce", TEST_NAMESPACE);
+        }
+    }
+
     /*
      * When running with an empty database some events related to the creation may
      * creep up here making the test fails. After attempting several other
@@ -207,11 +221,16 @@ public abstract class AbstractContextAwareRepoEvent extends BaseSpringTest
     }
 
     protected NodeRef createNode(QName contentType, PropertyMap propertyMap)
+    {
+        return createNode(contentType, GUID.generate(), propertyMap);
+    }
+
+    protected NodeRef createNode(QName contentType, String localName, PropertyMap propertyMap)
     {
         return retryingTransactionHelper.doInTransaction(() -> nodeService.createNode(
             rootNodeRef,
             ContentModel.ASSOC_CHILDREN,
-            QName.createQName(TEST_NAMESPACE, GUID.generate()),
+            QName.createQName(TEST_NAMESPACE, localName),
             contentType,
             propertyMap).getChildRef());
     }
diff --git a/repository/src/test/java/org/alfresco/repo/event2/ChildAssociationRepoEventIT.java b/repository/src/test/java/org/alfresco/repo/event2/ChildAssociationRepoEventIT.java
index d7db0e007a..11b6bcf77d 100644
--- a/repository/src/test/java/org/alfresco/repo/event2/ChildAssociationRepoEventIT.java
+++ b/repository/src/test/java/org/alfresco/repo/event2/ChildAssociationRepoEventIT.java
@@ -50,6 +50,7 @@ public class ChildAssociationRepoEventIT extends AbstractContextAwareRepoEvent
     @Test
     public void testAddChildAssociation()
     {
+        String assocLocalName = GUID.generate();
         final NodeRef parentNodeRef = createNode(ContentModel.TYPE_FOLDER);
         final NodeRef childNodeRef = createNode(ContentModel.TYPE_CONTENT);
 
@@ -64,11 +65,11 @@ public class ChildAssociationRepoEventIT extends AbstractContextAwareRepoEvent
             resultRepoEvent.getType());
 
         retryingTransactionHelper.doInTransaction(() ->
-            nodeService.addChild(
-                parentNodeRef,
-                childNodeRef,
-                ContentModel.ASSOC_CONTAINS,
-                QName.createQName(TEST_NAMESPACE, GUID.generate())));
+                                                      nodeService.addChild(
+                                                          parentNodeRef,
+                                                          childNodeRef,
+                                                          ContentModel.ASSOC_CONTAINS,
+                                                          QName.createQName(TEST_NAMESPACE, assocLocalName)));
 
         List<ChildAssociationRef> childAssociationRefs = retryingTransactionHelper.doInTransaction(() ->
                 nodeService.getChildAssocs(parentNodeRef));
@@ -101,6 +102,7 @@ public class ChildAssociationRepoEventIT extends AbstractContextAwareRepoEvent
         assertEquals("Wrong parent", parentNodeRef.getId(), childAssociationResource.getParent().getId());
         assertEquals("Wrong child", childNodeRef.getId(), childAssociationResource.getChild().getId());
         assertEquals("Wrong assoc type", "cm:contains", childAssociationResource.getAssocType());
+        assertEquals("Wrong assoc name", "ce:" + assocLocalName, childAssociationResource.getAssocQName());
     }
 
     @Test
diff --git a/repository/src/test/java/org/alfresco/repo/event2/CreateRepoEventIT.java b/repository/src/test/java/org/alfresco/repo/event2/CreateRepoEventIT.java
index db6b592c70..1e801ad206 100644
--- a/repository/src/test/java/org/alfresco/repo/event2/CreateRepoEventIT.java
+++ b/repository/src/test/java/org/alfresco/repo/event2/CreateRepoEventIT.java
@@ -53,16 +53,17 @@ public class CreateRepoEventIT extends AbstractContextAwareRepoEvent
 
     @Autowired
     private NodeDAO nodeDAO;
-    
+
     @Test
     public void testCreateEvent()
     {
         // Create a node without content
         final String name = "TestFile-" + System.currentTimeMillis() + ".txt";
+        String localName = GUID.generate();
         PropertyMap propertyMap = new PropertyMap();
         propertyMap.put(ContentModel.PROP_TITLE, "test title");
         propertyMap.put(ContentModel.PROP_NAME, name);
-        final NodeRef nodeRef = createNode(ContentModel.TYPE_CONTENT, propertyMap);
+        final NodeRef nodeRef = createNode(ContentModel.TYPE_CONTENT, localName, propertyMap);
 
         final RepoEvent<EventData<NodeResource>> resultRepoEvent = getRepoEvent(1);
         // Repo event attributes
@@ -103,6 +104,7 @@ public class CreateRepoEventIT extends AbstractContextAwareRepoEvent
         assertEquals("Wrong node modifier display name.", "Administrator",
             nodeResource.getModifiedByUser().getDisplayName());
         assertNotNull("Missing modifiedAt property.", nodeResource.getModifiedAt());
+        assertEquals("Wrong primaryAssocQName prefix.", "ce:" + localName, nodeResource.getPrimaryAssocQName());
     }
 
     @Test
diff --git a/repository/src/test/java/org/alfresco/repo/event2/DeleteRepoEventIT.java b/repository/src/test/java/org/alfresco/repo/event2/DeleteRepoEventIT.java
index 52a69434af..d7115c6677 100644
--- a/repository/src/test/java/org/alfresco/repo/event2/DeleteRepoEventIT.java
+++ b/repository/src/test/java/org/alfresco/repo/event2/DeleteRepoEventIT.java
@@ -45,9 +45,10 @@ public class DeleteRepoEventIT extends AbstractContextAwareRepoEvent
     @Test
     public void testDeleteContent()
     {
+        String localName = GUID.generate();
         PropertyMap propertyMap = new PropertyMap();
         propertyMap.put(ContentModel.PROP_TITLE, "test title");
-        NodeRef nodeRef = createNode(ContentModel.TYPE_CONTENT, propertyMap);
+        NodeRef nodeRef = createNode(ContentModel.TYPE_CONTENT, localName, propertyMap);
 
         NodeResource createdResource = getNodeResource(1);
 
@@ -64,6 +65,7 @@ public class DeleteRepoEventIT extends AbstractContextAwareRepoEvent
 
         assertEquals("Repo event type:", EventType.NODE_DELETED.getType(), resultRepoEvent.getType());
         assertEquals(createdResource.getId(), getNodeResource(resultRepoEvent).getId());
+        assertEquals("Wrong primaryAssocQName prefix.", "ce:" + localName, createdResource.getPrimaryAssocQName());
 
         // There should be no resourceBefore
         EventData<NodeResource> eventData = getEventData(resultRepoEvent);
diff --git a/repository/src/test/java/org/alfresco/repo/event2/UpdateRepoEventIT.java b/repository/src/test/java/org/alfresco/repo/event2/UpdateRepoEventIT.java
index 413fa7d395..6075c2fd0c 100644
--- a/repository/src/test/java/org/alfresco/repo/event2/UpdateRepoEventIT.java
+++ b/repository/src/test/java/org/alfresco/repo/event2/UpdateRepoEventIT.java
@@ -33,7 +33,6 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-
 import org.alfresco.model.ContentModel;
 import org.alfresco.repo.content.MimetypeMap;
 import org.alfresco.repo.dictionary.M2Model;
@@ -59,6 +58,7 @@ import org.junit.Test;
  */
 public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
 {
+
     @Test
     public void testUpdateNodeResourceContent()
     {
@@ -138,6 +138,7 @@ public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
         assertNull(resourceBefore.getProperties());
         assertNull(resourceBefore.getAspectNames());
         assertNull(resourceBefore.getPrimaryHierarchy());
+        assertNull(resourceBefore.getPrimaryAssocQName());
     }
 
     @Test
@@ -198,6 +199,7 @@ public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
         assertNull(resourceBefore.getProperties());
         assertNull(resourceBefore.getAspectNames());
         assertNull(resourceBefore.getPrimaryHierarchy());
+        assertNull(resourceBefore.getPrimaryAssocQName());
     }
 
     @Test
@@ -274,6 +276,7 @@ public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
         assertNull(resourceBefore.getProperties());
         assertNull(resourceBefore.getAspectNames());
         assertNull(resourceBefore.getPrimaryHierarchy());
+        assertNull(resourceBefore.getPrimaryAssocQName());
     }
 
     @Test
@@ -539,6 +542,7 @@ public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
         assertNull(resourceBefore.getProperties());
         assertNull(resourceBefore.getAspectNames());
         assertNull(resourceBefore.getPrimaryHierarchy());
+        assertNull(resourceBefore.getPrimaryAssocQName());
     }
 
     @Test
@@ -574,6 +578,7 @@ public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
         NodeResource nodeResource = getNodeResource(resultRepoEvent);
         assertEquals("Incorrect node type was found", "cm:dictionaryModel", nodeResource.getNodeType());
 
+        initTestNamespacePrefixMapping();
         final NodeRef nodeRef = createNode(ContentModel.TYPE_CONTENT);
         // old node's type
         assertEquals(ContentModel.TYPE_CONTENT, nodeService.getType(nodeRef));
@@ -613,7 +618,7 @@ public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
         assertNull(resourceBefore.getProperties());
         assertNull(resourceBefore.getAspectNames());
         assertNull(resourceBefore.getPrimaryHierarchy());
-
+        assertNull(resourceBefore.getPrimaryAssocQName());
     }
 
     @Test
@@ -660,6 +665,7 @@ public class UpdateRepoEventIT extends AbstractContextAwareRepoEvent
         assertNull(resourceBefore.getProperties());
         assertNull(resourceBefore.getAspectNames());
         assertNull(resourceBefore.getPrimaryHierarchy());
+        assertNull(resourceBefore.getPrimaryAssocQName());
     }
 
     @Test