diff --git a/openerp/addons/base/ir/ir_attachment.py b/openerp/addons/base/ir/ir_attachment.py
index 704488f6938..285551cb3c9 100644
--- a/openerp/addons/base/ir/ir_attachment.py
+++ b/openerp/addons/base/ir/ir_attachment.py
@@ -44,6 +44,7 @@ class ir_attachment(osv.osv):
     The default implementation is the file:dirname location that stores files
     on the local filesystem using name based on their sha1 hash
     """
+    _order = 'id desc'
     def _name_get_resname(self, cr, uid, ids, object, method, context):
         data = {}
         for attachment in self.browse(cr, uid, ids, context=context):
diff --git a/openerp/import_xml.rng b/openerp/import_xml.rng
index d4cd358ae89..e694e6d64b8 100644
--- a/openerp/import_xml.rng
+++ b/openerp/import_xml.rng
@@ -167,6 +167,10 @@
                         <rng:ref name="any"/>
                     </rng:oneOrMore>
                 </rng:group>
+                <rng:group>
+                    <rng:attribute name="file"/>
+                    <rng:empty/>
+                </rng:group>
                 <rng:group>
                     <rng:attribute name="ref"/>
                     <rng:empty/>
diff --git a/openerp/tools/convert.py b/openerp/tools/convert.py
index 3334649eec0..a316dc28a9b 100644
--- a/openerp/tools/convert.py
+++ b/openerp/tools/convert.py
@@ -175,6 +175,13 @@ def _eval_xml(self, node, pool, cr, uid, idref, context=None):
         if t == 'html':
             return _process("".join([etree.tostring(n, encoding='utf-8')
                                    for n in node]), idref)
+        if node.get('file'):
+            import openerp.tools
+            import base64
+            fp = openerp.tools.file_open(node.get('file'))
+            result = base64.b64encode(fp.read())
+            return result
+
         if t == 'file':
             from ..modules import module
             path = node.text.strip()
@@ -241,7 +248,9 @@ class xml_import(object):
         return val.lower() not in ('0', 'false', 'off')
 
     def isnoupdate(self, data_node=None):
-        return self.noupdate or (len(data_node) and self.nodeattr2bool(data_node, 'noupdate', False))
+        if data_node and data_node.get('noupdate'):
+            return len(data_node) and self.nodeattr2bool(data_node, 'noupdate', False)
+        return self.noupdate
 
     def get_context(self, data_node, node, eval_dict):
         data_node_context = (len(data_node) and data_node.get('context','').encode('utf8'))