diff --git a/lib/lutaml/uml/top_element_attribute.rb b/lib/lutaml/uml/top_element_attribute.rb
index fd70b5f..4b5eede 100644
--- a/lib/lutaml/uml/top_element_attribute.rb
+++ b/lib/lutaml/uml/top_element_attribute.rb
@@ -9,6 +9,7 @@ class TopElementAttribute
       attr_accessor :name,
                     :visibility,
                     :type,
+                    :id,
                     :xmi_id,
                     :definition,
                     :contain,
diff --git a/lib/lutaml/uml/value.rb b/lib/lutaml/uml/value.rb
index 96c327d..754d39c 100644
--- a/lib/lutaml/uml/value.rb
+++ b/lib/lutaml/uml/value.rb
@@ -8,6 +8,7 @@ class Value
 
       attr_accessor :definition,
                     :name,
+                    :id,
                     :type
 
       # rubocop:disable Rails/ActiveRecordAliases