diff --git a/code/internal/+openminds/+abstract/Schema.m b/code/internal/+openminds/+abstract/Schema.m
index 22209b85..11ee2724 100644
--- a/code/internal/+openminds/+abstract/Schema.m
+++ b/code/internal/+openminds/+abstract/Schema.m
@@ -560,6 +560,11 @@ function assignInstanceId(obj, id)
             displayLabel = sprintf("%s", str);
         end
 
+        function str = createLabelForMissingLabelDefinition(obj)
+            classNames = split( class(obj), '.');
+            str = sprintf('<Unlabeled %s>', classNames{end});
+        end
+
         function annotation = getAnnotation(obj)
 
             import openminds.internal.utility.getSchemaDocLink