--- a/src/pyams_content/component/keynumber/interfaces/__init__.py	Fri Jul 13 09:23:53 2018 +0200
+++ b/src/pyams_content/component/keynumber/interfaces/__init__.py	Fri Jul 13 09:24:29 2018 +0200
@@ -59,6 +59,9 @@
                              required=False)
 
 
+KEYNUMBER_HIDDEN_FIELDS = ('__parent__', '__name__', 'visible')
+
+
 class IKeyNumberContainer(IOrderedContainer):
     """Key numbers container interface"""