diff --git a/plugins/org.eclipse.fordiac.ide.model.edit/src/org/eclipse/fordiac/ide/model/edit/TypeEntryAdapter.java b/plugins/org.eclipse.fordiac.ide.model.edit/src/org/eclipse/fordiac/ide/model/edit/TypeEntryAdapter.java
index 9418e20fdb..e75d7118bf 100644
--- a/plugins/org.eclipse.fordiac.ide.model.edit/src/org/eclipse/fordiac/ide/model/edit/TypeEntryAdapter.java
+++ b/plugins/org.eclipse.fordiac.ide.model.edit/src/org/eclipse/fordiac/ide/model/edit/TypeEntryAdapter.java
@@ -22,6 +22,7 @@
 import org.eclipse.emf.common.notify.impl.AdapterImpl;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.fordiac.ide.model.commands.change.ChangeAttributeDeclarationCommand;
+import org.eclipse.fordiac.ide.model.commands.change.ChangeAttributeTypeCommand;
 import org.eclipse.fordiac.ide.model.commands.change.ChangeDataTypeCommand;
 import org.eclipse.fordiac.ide.model.commands.change.ChangeStructCommand;
 import org.eclipse.fordiac.ide.model.commands.change.ConfigureFBCommand;
@@ -192,6 +193,10 @@ private static void handleDataTypeEntryUpdate(final LibraryElement editedElement
 		final DataTypeInstanceSearch search = new DataTypeInstanceSearch(editedElement, dtEntry);
 		final AnyDerivedType dataType = dtEntry.getType();
 		search.performSearch().stream().map(item -> {
+			if (item instanceof final Attribute attr) {
+				return ChangeAttributeTypeCommand.forDataType(attr, dataType);
+			}
+
 			if (item instanceof final VarDeclaration varDecl) {
 				return ChangeDataTypeCommand.forDataType(varDecl, dataType);
 			}
diff --git a/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/DataTypeInstanceSearch.java b/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/DataTypeInstanceSearch.java
index be003ef29b..0a588ab0d8 100644
--- a/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/DataTypeInstanceSearch.java
+++ b/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/DataTypeInstanceSearch.java
@@ -16,11 +16,16 @@
 
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.fordiac.ide.model.data.StructuredType;
+import org.eclipse.fordiac.ide.model.libraryElement.Application;
+import org.eclipse.fordiac.ide.model.libraryElement.Attribute;
 import org.eclipse.fordiac.ide.model.libraryElement.AttributeDeclaration;
 import org.eclipse.fordiac.ide.model.libraryElement.AutomationSystem;
 import org.eclipse.fordiac.ide.model.libraryElement.ConfigurableFB;
+import org.eclipse.fordiac.ide.model.libraryElement.ConfigurableObject;
 import org.eclipse.fordiac.ide.model.libraryElement.ErrorMarkerDataType;
+import org.eclipse.fordiac.ide.model.libraryElement.FBNetworkElement;
 import org.eclipse.fordiac.ide.model.libraryElement.FBType;
+import org.eclipse.fordiac.ide.model.libraryElement.IInterfaceElement;
 import org.eclipse.fordiac.ide.model.libraryElement.LibraryElement;
 import org.eclipse.fordiac.ide.model.libraryElement.UntypedSubApp;
 import org.eclipse.fordiac.ide.model.libraryElement.VarDeclaration;
@@ -55,7 +60,8 @@ private static IEC61499SearchFilter createSearchFilter(final TypeEntry dtEntry)
 		return searchCandidate -> (searchCandidate instanceof final VarDeclaration varDecl
 				&& dtEntry == varDecl.getType().getTypeEntry())
 				|| (searchCandidate instanceof final ConfigurableFB configFb
-						&& isConfiguredWithDataType(configFb, dtEntry));
+						&& isConfiguredWithDataType(configFb, dtEntry))
+				|| (searchCandidate instanceof final Attribute attr && attr.getType().getTypeEntry() == dtEntry);
 	}
 
 	private static boolean isConfiguredWithDataType(final ConfigurableFB confFB, final TypeEntry dtEntry) {
@@ -72,7 +78,9 @@ private static final class DataTypeInstanceSearchChildrenProvider implements ISe
 		@Override
 		public boolean hasChildren(final EObject obj) {
 			return (obj instanceof FBType) || (obj instanceof AutomationSystem) || (obj instanceof UntypedSubApp)
-					|| (obj instanceof final StructuredType) || (obj instanceof final AttributeDeclaration);
+					|| (obj instanceof final StructuredType) || (obj instanceof final AttributeDeclaration)
+					|| (obj instanceof final Application) || (obj instanceof Attribute)
+					|| (obj instanceof FBNetworkElement) || (obj instanceof IInterfaceElement);
 		}
 
 		@Override
@@ -81,9 +89,17 @@ public Stream<? extends EObject> getChildren(final EObject obj) {
 				return SearchChildrenProviderHelper.getFBTypeChildren(fbType);
 			}
 			if (obj instanceof final AutomationSystem system) {
-				return system.getApplication().stream()
-						.flatMap(app -> app.getFBNetwork().getNetworkElements().stream());
+				return Stream.concat(system.getAttributes().stream(), system.getApplication().stream());
 			}
+
+			if (obj instanceof final Application application) {
+				Stream<? extends EObject> stream = application.getFBNetwork().getNetworkElements().stream();
+				stream = Stream.concat(stream, application.getFBNetwork().getAdapterConnections().stream());
+				stream = Stream.concat(stream, application.getFBNetwork().getDataConnections().stream());
+				stream = Stream.concat(stream, application.getFBNetwork().getEventConnections().stream());
+				return Stream.concat(stream, application.getAttributes().stream());
+			}
+
 			if (obj instanceof final UntypedSubApp untypedSubapp) {
 				return SearchChildrenProviderHelper.getUntypedSubappChildren(untypedSubapp);
 			}
@@ -93,6 +109,24 @@ public Stream<? extends EObject> getChildren(final EObject obj) {
 			if (obj instanceof final AttributeDeclaration attrdecl) {
 				return SearchChildrenProviderHelper.getAttributeDeclChildren(attrdecl);
 			}
+
+			if (obj instanceof final FBNetworkElement elem) {
+				return Stream.concat(elem.getAttributes().stream(),
+						SearchChildrenProviderHelper.getInterfaceListChildren(elem.getInterface()));
+			}
+
+			if (obj instanceof final IInterfaceElement interfaceElement) {
+				return interfaceElement.getAttributes().stream();
+			}
+
+			if (obj instanceof final Attribute atrr) {
+				return Stream.of(atrr.getType());
+			}
+
+			if (obj instanceof final ConfigurableObject object) {
+				return object.getAttributes().stream();
+			}
+
 			return null;
 		}
 	}
diff --git a/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/SearchChildrenProviderHelper.java b/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/SearchChildrenProviderHelper.java
index b05ed1f182..06f0664ff2 100644
--- a/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/SearchChildrenProviderHelper.java
+++ b/plugins/org.eclipse.fordiac.ide.model.search/src/org/eclipse/fordiac/ide/model/search/types/SearchChildrenProviderHelper.java
@@ -39,13 +39,18 @@ public static Stream<? extends EObject> getFBTypeChildren(final FBType fbType) {
 		if (fbType instanceof final SubAppType subappType) {
 			// we may have untyped subapps inside
 			retval = Stream.concat(retval, subappType.getFBNetwork().getNetworkElements().stream());
+			retval = Stream.concat(retval, subappType.getFBNetwork().getAdapterConnections().stream());
+			retval = Stream.concat(retval, subappType.getFBNetwork().getDataConnections().stream());
+			retval = Stream.concat(retval, subappType.getFBNetwork().getEventConnections().stream());
 		}
+
 		return retval;
 	}
 
 	public static Stream<? extends EObject> getUntypedSubappChildren(final UntypedSubApp untypedSubapp) {
 		Stream<? extends EObject> retval = getInterfaceListChildren(untypedSubapp.getInterface());
 		retval = Stream.concat(retval, untypedSubapp.getSubAppNetwork().getNetworkElements().stream());
+		retval = Stream.concat(retval, untypedSubapp.getAttributes().stream());
 		return retval;
 	}