--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_content/reference/__init__.py	Sat Mar 10 02:35:15 2018 +0100
@@ -0,0 +1,66 @@
+#
+# Copyright (c) 2008-2015 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'
+
+
+# import standard library
+from persistent import Persistent
+
+# import interfaces
+from pyams_content.reference.interfaces import IReferenceManager, IReferenceTable, IReferenceInfo
+from pyams_i18n.interfaces import II18nManager
+from zope.component.interfaces import ISite
+from zope.lifecycleevent import IObjectAddedEvent
+
+# import packages
+from pyams_utils.traversing import get_parent
+from pyramid.events import subscriber
+from zope.container.contained import Contained
+from zope.container.folder import Folder
+from zope.interface import implementer
+from zope.schema.fieldproperty import FieldProperty
+
+
+@implementer(IReferenceManager)
+class ReferencesManager(Folder):
+    """References tables container"""
+
+    title = FieldProperty(IReferenceManager['title'])
+    short_name = FieldProperty(IReferenceManager['short_name'])
+
+
+@subscriber(IObjectAddedEvent, context_selector=IReferenceManager)
+def handle_added_references_manager(event):
+    """Handle new references manager"""
+    site = get_parent(event.object, ISite)
+    registry = site.getSiteManager()
+    if registry is not None:
+        registry.registerUtility(event.object, IReferenceManager)
+
+
+@implementer(IReferenceTable, II18nManager)
+class ReferenceTable(Folder):
+    """References table"""
+
+    title = FieldProperty(IReferenceTable['title'])
+    short_name = FieldProperty(IReferenceTable['short_name'])
+
+    languages = FieldProperty(II18nManager['languages'])
+
+
+@implementer(IReferenceInfo)
+class ReferenceInfo(Persistent, Contained):
+    """Reference record"""
+
+    title = FieldProperty(IReferenceInfo['title'])
+    short_name = FieldProperty(IReferenceInfo['short_name'])