title: Can't do an xpath in openerp 7
body: <p>Hello I'm usually coding in Odoo v10 and +, </p>
  
  <p>Now I have to code on OpenERP 7, and I don't succeed to do a simple Xpath !
  Here is my XML stock_view.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;openerp&gt;
      &lt;data&gt;
      &lt;!--...--&gt;
      &lt;!--...--&gt;
  
          &lt;record model="ir.ui.view" id="view_picking_in_form_adquat"&gt;
              &lt;field name="name"&gt;stock.picking.in.adquat&lt;/field&gt;
              &lt;field name="model"&gt;stock.picking.in&lt;/field&gt;
              &lt;field name="inherit_id" ref="stock.view_picking_in_form"/&gt;
              &lt;field name="arch" type="xml"&gt;
  
                  &lt;xpath expr="/field[@name='origin']" &gt; &lt;!--position="after"--&gt;                        &lt;!--...--&gt;
                      &lt;string&gt;I'm Here&lt;/string&gt;
                  &lt;/xpath&gt;
  
              &lt;/field&gt;
          &lt;/record&gt;
  &lt;!--... --&gt;
      &lt;/data&gt;
  &lt;/openerp&gt;
  </code></pre>
  
  <p>It seems the error is in the arch field : "ValidateError Error occurred while validating the field(s) arch: Invalid XML for View Architecture"</p>
  
  <pre><code>Client Traceback (most recent call last):
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/http.py", line 204, in dispatch
      response["result"] = method(self, **self.params)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/controllers/main.py", line 1135, in call_button
      action = self._call_kw(req, model, method, args, {})
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/controllers/main.py", line 1123, in _call_kw
      return getattr(req.session.model(model), method)(*args, **kwargs)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 42, in proxy
      result = self.proxy.execute_kw(self.session._db, self.session._uid, self.session._password, self.model, method, args, kw)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 30, in proxy_method
      result = self.session.send(self.service_name, method, *args)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 103, in send
      raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)
  
  
  Server Traceback (most recent call last):
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 89, in send
      return openerp.netsvc.dispatch_rpc(service_name, method, args)
    File "/usr/lib/pymodules/python2.7/openerp/netsvc.py", line 292, in dispatch_rpc
      result = ExportService.getService(service_name).dispatch(method, params)
    File "/usr/lib/pymodules/python2.7/openerp/service/web_services.py", line 622, in dispatch
      security.check(db,uid,passwd)
    File "/usr/lib/pymodules/python2.7/openerp/service/security.py", line 40, in check
      pool = pooler.get_pool(db)
    File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 49, in get_pool
      return get_db_and_pool(db_name, force_demo, status, update_module)[1]
    File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 33, in get_db_and_pool
      registry = RegistryManager.get(db_name, force_demo, status, update_module)
    File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 192, in get
      update_module)
    File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 218, in new
      openerp.modules.load_modules(registry.db, force_demo, status, update_module)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 350, in load_modules
      force, status, report, loaded_modules, update_module)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 256, in load_marked_modules
      loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 188, in load_module_graph
      load_data(module_name, idref, mode)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 76, in &lt;lambda&gt;
      load_data = lambda *args: _load_data(cr, *args, kind='data')
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 124, in _load_data
      tools.convert_xml_import(cr, module_name, fp, idref, mode, noupdate, report)
    File "/usr/lib/pymodules/python2.7/openerp/tools/convert.py", line 954, in convert_xml_import
      obj.parse(doc.getroot())
    File "/usr/lib/pymodules/python2.7/openerp/tools/convert.py", line 847, in parse
      self._tags[rec.tag](self.cr, rec, n)
    File "/usr/lib/pymodules/python2.7/openerp/tools/convert.py", line 814, in _tag_record
      id = self.pool.get('ir.model.data')._update(cr, self.uid, rec_model, self.module, res, rec_id or False, not self.isnoupdate(data_node), noupdate=self.isnoupdate(data_node), mode=self.mode, context=rec_context )
    File "/usr/lib/pymodules/python2.7/openerp/addons/base/ir/ir_model.py", line 964, in _update
      res_id = model_obj.create(cr, uid, values, context=context)
    File "/usr/lib/pymodules/python2.7/openerp/addons/base/ir/ir_ui_view.py", line 103, in create
      return super(view, self).create(cr, uid, values, context)
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 4472, in create
      self._validate(cr, user, [id_new], context)
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 1546, in _validate
      raise except_orm('ValidateError', '\n'.join(error_msgs))
  except_orm: ('ValidateError', u'Une erreur est apparue lors de la validation du/des champ(s) arch: Invalid XML for View Architecture!')
  </code></pre>
  
  <p>Can someone tell me if there is syntax differences between odoo and openerp ?</p>