=== modified file 'dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata2/objectbundle/DefaultObjectBundleService.java'
--- dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata2/objectbundle/DefaultObjectBundleService.java	2016-03-03 10:04:35 +0000
+++ dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata2/objectbundle/DefaultObjectBundleService.java	2016-03-04 03:55:19 +0000
@@ -322,7 +322,26 @@
 
     private void handleUpdates( List<IdentifiableObject> objects, ObjectBundle bundle )
     {
-
+        for ( IdentifiableObject object : objects )
+        {
+            if ( Preheat.isDefault( object ) ) continue;
+
+            IdentifiableObject persistedObject = bundle.getPreheat().get( bundle.getPreheatIdentifier(), object );
+            persistedObject.mergeWith( object, bundle.getMergeMode() );
+
+            objectBundleHooks.forEach( hook -> hook.preUpdate( persistedObject, bundle ) );
+
+            preheatService.connectReferences( persistedObject, bundle.getPreheat(), bundle.getPreheatIdentifier() );
+            manager.update( persistedObject, bundle.getUser() );
+
+            objectBundleHooks.forEach( hook -> hook.postUpdate( persistedObject, bundle ) );
+
+            if ( log.isDebugEnabled() )
+            {
+                String msg = "Updated object '" + IdentifiableObjectUtils.getDisplayName( object ) + "'";
+                log.debug( msg );
+            }
+        }
     }
 
     private void handleDeletes( List<IdentifiableObject> objects, ObjectBundle bundle )

=== modified file 'dhis-2/dhis-services/dhis-service-dxf2/src/test/java/org/hisp/dhis/dxf2/metadata2/objectbundle/ObjectBundleServiceTest.java'
--- dhis-2/dhis-services/dhis-service-dxf2/src/test/java/org/hisp/dhis/dxf2/metadata2/objectbundle/ObjectBundleServiceTest.java	2016-03-04 03:27:18 +0000
+++ dhis-2/dhis-services/dhis-service-dxf2/src/test/java/org/hisp/dhis/dxf2/metadata2/objectbundle/ObjectBundleServiceTest.java	2016-03-04 03:55:19 +0000
@@ -30,6 +30,7 @@
 
 import org.hisp.dhis.DhisSpringTest;
 import org.hisp.dhis.attribute.Attribute;
+import org.hisp.dhis.common.IdScheme;
 import org.hisp.dhis.common.IdentifiableObject;
 import org.hisp.dhis.common.IdentifiableObjectManager;
 import org.hisp.dhis.common.MergeMode;
@@ -37,9 +38,11 @@
 import org.hisp.dhis.dataelement.DataElementCategoryCombo;
 import org.hisp.dhis.dataelement.DataElementGroup;
 import org.hisp.dhis.dataset.DataSet;
+import org.hisp.dhis.dxf2.metadata2.MetadataExportService;
 import org.hisp.dhis.feedback.ErrorCode;
 import org.hisp.dhis.feedback.ErrorReport;
 import org.hisp.dhis.importexport.ImportStrategy;
+import org.hisp.dhis.node.NodeService;
 import org.hisp.dhis.option.Option;
 import org.hisp.dhis.option.OptionSet;
 import org.hisp.dhis.organisationunit.OrganisationUnit;
@@ -75,6 +78,12 @@
     private IdentifiableObjectManager manager;
 
     @Autowired
+    private MetadataExportService metadataExportService;
+
+    @Autowired
+    private NodeService nodeService;
+
+    @Autowired
     private RenderService _renderService;
 
     @Override
@@ -610,6 +619,42 @@
         assertEquals( 1, dataElements.get( 1 ).getUserGroupAccesses().size() );
     }
 
+    @Test
+    public void testUpdateDataElements() throws IOException
+    {
+        defaultSetup();
+
+        Map<Class<? extends IdentifiableObject>, List<IdentifiableObject>> metadata = renderService.fromMetadata(
+            new ClassPathResource( "dxf2/de_update1.json" ).getInputStream(), RenderFormat.JSON );
+
+        ObjectBundleParams params = new ObjectBundleParams();
+        params.setObjectBundleMode( ObjectBundleMode.COMMIT );
+        params.setImportMode( ImportStrategy.UPDATE );
+        params.setObjects( metadata );
+
+        ObjectBundle bundle = objectBundleService.create( params );
+        objectBundleService.validate( bundle );
+        objectBundleService.commit( bundle );
+
+        Map<String, DataElement> dataElementMap = manager.getIdMap( DataElement.class, IdScheme.UID );
+        assertEquals( 4, dataElementMap.size() );
+
+        DataElement dataElementA = dataElementMap.get( "deabcdefghA" );
+        DataElement dataElementB = dataElementMap.get( "deabcdefghB" );
+        DataElement dataElementC = dataElementMap.get( "deabcdefghC" );
+        DataElement dataElementD = dataElementMap.get( "deabcdefghD" );
+
+        assertNotNull( dataElementA );
+        assertNotNull( dataElementB );
+        assertNotNull( dataElementC );
+        assertNotNull( dataElementD );
+
+        assertEquals( "DEA", dataElementA.getName() );
+        assertEquals( "DEB", dataElementB.getName() );
+        assertEquals( "DEC", dataElementC.getName() );
+        assertEquals( "DED", dataElementD.getName() );
+    }
+
     private void defaultSetup()
     {
         DataElement de1 = createDataElement( 'A' );

=== added file 'dhis-2/dhis-services/dhis-service-dxf2/src/test/resources/dxf2/de_update1.json'
--- dhis-2/dhis-services/dhis-service-dxf2/src/test/resources/dxf2/de_update1.json	1970-01-01 00:00:00 +0000
+++ dhis-2/dhis-services/dhis-service-dxf2/src/test/resources/dxf2/de_update1.json	2016-03-04 03:55:19 +0000
@@ -0,0 +1,84 @@
+{
+  "dataElements": [
+    {
+      "code": "DECA",
+      "created": "2016-03-04T03:37:12.714+0000",
+      "lastUpdated": "2016-03-04T03:37:12.733+0000",
+      "name": "DEA",
+      "id": "deabcdefghA",
+      "shortName": "DESA",
+      "aggregationType": "SUM",
+      "domainType": "AGGREGATE",
+      "publicAccess": "--------",
+      "description": "DEDA",
+      "zeroIsSignificant": false,
+      "valueType": "INTEGER",
+      "categoryCombo": {
+        "id": "hmqVMxvDKUD"
+      },
+      "userGroupAccesses": [],
+      "attributeValues": [],
+      "aggregationLevels": []
+    },
+    {
+      "code": "DECB",
+      "created": "2016-03-04T03:37:12.720+0000",
+      "lastUpdated": "2016-03-04T03:37:12.741+0000",
+      "name": "DEB",
+      "id": "deabcdefghB",
+      "shortName": "DESB",
+      "aggregationType": "SUM",
+      "domainType": "AGGREGATE",
+      "publicAccess": "--------",
+      "description": "DEDB",
+      "zeroIsSignificant": false,
+      "valueType": "INTEGER",
+      "categoryCombo": {
+        "id": "hmqVMxvDKUD"
+      },
+      "userGroupAccesses": [],
+      "attributeValues": [],
+      "aggregationLevels": []
+    },
+    {
+      "code": "DECC",
+      "created": "2016-03-04T03:37:12.725+0000",
+      "lastUpdated": "2016-03-04T03:37:12.743+0000",
+      "name": "DEC",
+      "id": "deabcdefghC",
+      "shortName": "DESC",
+      "aggregationType": "SUM",
+      "domainType": "AGGREGATE",
+      "publicAccess": "--------",
+      "description": "DEDC",
+      "zeroIsSignificant": false,
+      "valueType": "INTEGER",
+      "categoryCombo": {
+        "id": "hmqVMxvDKUD"
+      },
+      "userGroupAccesses": [],
+      "attributeValues": [],
+      "aggregationLevels": []
+    },
+    {
+      "code": "DECD",
+      "created": "2016-03-04T03:37:12.729+0000",
+      "lastUpdated": "2016-03-04T03:37:12.745+0000",
+      "name": "DED",
+      "id": "deabcdefghD",
+      "shortName": "DESD",
+      "aggregationType": "SUM",
+      "domainType": "AGGREGATE",
+      "publicAccess": "--------",
+      "description": "DEDD",
+      "zeroIsSignificant": false,
+      "valueType": "INTEGER",
+      "categoryCombo": {
+        "id": "hmqVMxvDKUD"
+      },
+      "userGroupAccesses": [],
+      "attributeValues": [],
+      "aggregationLevels": []
+    }
+  ]
+}
\ No newline at end of file