--- a/server/src/app/Models/Document.php	Fri Feb 03 16:35:09 2017 +0100
+++ b/server/src/app/Models/Document.php	Mon Feb 06 10:03:33 2017 +0100
@@ -29,6 +29,7 @@
     private $transcript = false;
     private $contributors = null;
     private $subjects = null;
+    private $types = null;
     private $geoInfo = false;
 
     protected function clearMemoizationCache() {
@@ -37,6 +38,7 @@
         $this->mediaArray = null;
         $this->contributors = null;
         $this->subjects = null;
+        $this->types = null;
         $this->transcript = false;
         $this->geoInfo = false;
     }
@@ -95,7 +97,10 @@
     }
 
     public function getTypes() {
-        return $this->getProvidedCHO()->all('dc11:type');
+        if(is_null($this->types)) {
+            $this->types = $this->getProvidedCHO()->all('dc11:type');
+        }
+        return $this->types;
     }
 
     public function getDiscourseTypes() {
@@ -350,11 +355,16 @@
                 function($s) { return Utils::processLiteralResourceOrString($s); },
                 $this->getSubjects()
             );
+            $types = array_map(
+                function($s) { return Utils::processLiteralResourceOrString($s); },
+                $this->getTypes()
+            );
 
             $res = array_merge($res, [
                 'publishers' => $publishers,
                 'contributors' => $contributors,
                 'subjects' => $subjects,
+                'types' => $types,
                 'transcript' => $transcript,
                 'mediaArray'=> $mediaArray,
                 'geoInfo' => $geoInfo