diff -r a2f3b82f93c3 -r 8e9a1496c2ba src/pyams_content/component/illustration/__init__.py
--- a/src/pyams_content/component/illustration/__init__.py	Thu Sep 06 11:27:55 2018 +0200
+++ b/src/pyams_content/component/illustration/__init__.py	Thu Sep 06 11:33:49 2018 +0200
@@ -52,9 +52,10 @@
 class BasicIllustration(Persistent, Contained):
     """Illustration persistent class"""
 
-    _data = I18nFileProperty(IIllustration['data'])
-    title = FieldProperty(IIllustration['title'])
-    alt_title = FieldProperty(IIllustration['alt_title'])
+    _data = I18nFileProperty(IBasicIllustration['data'])
+    title = FieldProperty(IBasicIllustration['title'])
+    alt_title = FieldProperty(IBasicIllustration['alt_title'])
+    author = FieldProperty(IBasicIllustration['author'])
 
     @property
     def data(self):
@@ -94,7 +95,6 @@
     """Illustration persistent class"""
 
     description = FieldProperty(IIllustration['description'])
-    author = FieldProperty(IIllustration['author'])
     renderer = FieldProperty(IIllustration['renderer'])