--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_default_theme/shared/common/interfaces.py	Fri Dec 28 10:49:47 2018 +0100
@@ -0,0 +1,33 @@
+#
+# Copyright (c) 2008-2018 Thierry Florac <tflorac AT ulthar.net>
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+
+__docformat__ = 'restructuredtext'
+
+from zope.contentprovider.interfaces import IContentProvider
+
+from pyams_portal.interfaces import IPortletSettings
+
+
+class ICustomContentHeaderRenderer(IContentProvider):
+    """Custom content header renderer"""
+
+
+class ISharedContentSpecificitiesPortletSettings(IPortletSettings):
+    """Shared content specificities portlet settings"""
+
+
+class ICustomContentSpecificitiesRenderer(IContentProvider):
+    """Custom content specificities renderer"""
+
+
+class ICustomContentSpecificitiesParagraphRenderer(IContentProvider):
+    """Custom content specificities paragraph renderer"""