diff -r d7c5b43d309a -r 0365fd9977a4 server/src/app/Models/Document.php
--- a/server/src/app/Models/Document.php	Wed Oct 19 15:55:04 2016 +0200
+++ b/server/src/app/Models/Document.php	Wed Oct 19 18:05:51 2016 +0200
@@ -100,13 +100,13 @@
 
     public function getDiscourseTypes() {
         return array_values(array_filter($this->getTypes(), function($v) {
-            return $v instanceof Literal && $v->getDatatypeUri() === Config::get('corpusparole.olac_discourse_type')['uri'];
+            return $v instanceof Resource && preg_match(config('corpusparole.bnf_ark_url_regexp'), $v->getUri());
         }));
     }
 
     public function getOtherTypes() {
         $res = array_values(array_filter($this->getTypes(), function($v) {
-            return $v instanceof Resource || $v->getDatatypeUri() !== Config::get('corpusparole.olac_discourse_type')['uri'];
+            return !($v instanceof Resource) || !preg_match(config('corpusparole.bnf_ark_url_regexp'), $v->getUri());
         }));
         return $res;
     }
@@ -190,15 +190,14 @@
 
         //delete
         foreach($this->getDiscourseTypes() as $discourseType) {
-            $literalValue = new Literal($discourseType, null, Config::get('corpusparole.olac_discourse_type')['uri']);
-            $this->getProvidedCHO()->delete('dc11:type', $literalValue);
-            $this->currentDelta->getDeletedGraph()->add($this->getProvidedCHO(), 'dc11:type', new Literal($discourseType, null, Config::get('corpusparole.olac_discourse_type')['uri']));
+            $this->getProvidedCHO()->delete('dc11:type', $discourseType);
+            $this->currentDelta->getDeletedGraph()->addResource($this->getProvidedCHO(), 'dc11:type', $discourseType->getUri());
         }
 
         // and re-add them
         foreach($discoursesTypes as $dType) {
-            $this->getProvidedCHO()->add('dc11:type', new Literal($dType, null, Config::get('corpusparole.olac_discourse_type')['uri']));
-            $this->currentDelta->getAddedGraph()->add($this->getProvidedCHO(), 'dc11:type', new Literal($dType, null, Config::get('corpusparole.olac_discourse_type')['uri']));
+            $this->getProvidedCHO()->addResource('dc11:type', $dType);
+            $this->currentDelta->getAddedGraph()->addResource($this->getProvidedCHO(), 'dc11:type', $dType);
         }
 
         $this->clearMemoizationCache();