diff --git a/product/ERP5/PropertySheet/Snapshot.py b/product/ERP5/PropertySheet/Snapshot.py
new file mode 100644
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+++ b/product/ERP5/PropertySheet/Snapshot.py
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+##############################################################################
+#
+# Copyright (c) 2006 Nexedi SARL and Contributors. All Rights Reserved.
+#          Jean-Paul Smets <jp@nexedi.com>
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsability of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# garantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+class Snapshot:
+  """
+     This property sheet defines the way to store data (file, images, etc.)
+     in the form of an object of any type
+  """
+
+  _properties = (
+    { 'id'          : 'snapshot_data',
+      'description' : 'An object (string, stream, etc.) which contains raw data'
+                      'of a snapshot. Snapshot is used to keep a visual representation'
+                      'of a document such as an invoice.',
+      'type'        : 'object',
+      'write_permission' : 'Manage properties',
+      'default'     : '',
+      'mode'        : 'w' },
+    { 'id'          : 'snapshot_content_type',
+      'description' : 'A string which represents the mime type of the snapshot data',
+      'type'        : 'string',
+      'default'     : 'application/pdf',
+      'mode'        : 'w' },
+   )