diff -r aefaad270b9b -r 084aae09edf4 server/src/app/Console/Commands/ImportCocoonRDF.php
--- a/server/src/app/Console/Commands/ImportCocoonRDF.php	Wed Oct 05 02:31:25 2016 +0200
+++ b/server/src/app/Console/Commands/ImportCocoonRDF.php	Thu Oct 06 11:14:32 2016 +0200
@@ -100,8 +100,8 @@
         $documentCounts = ['all' => 0, 'unknown' => 0, 'error' => 0];
 
         foreach ($recs as $item) {
-
-            $identifier = (string) $item->xpath('/record/header/identifier')[0];
+            $item->registerXPathNamespace('oai', "http://www.openarchives.org/OAI/2.0/");
+            $identifier = (string) $item->xpath('/oai:record/oai:header/oai:identifier')[0];
             $docRdfUrl = Config::get('corpusparole.cocoon_rdf_base_uri').substr($identifier, strlen(Config::get('corpusparole.cocoon_doc_id_base')));
             $message = "$identifier : $docRdfUrl";
             if($recs->getNumRetrieved() <= $skip) {