diff -r 7b2dcd2b31c1 -r 74fba571487e server/src/app/Models/DocumentBase.php
--- a/server/src/app/Models/DocumentBase.php	Mon Feb 06 16:05:02 2017 +0100
+++ b/server/src/app/Models/DocumentBase.php	Wed Feb 08 15:25:24 2017 +0100
@@ -22,6 +22,8 @@
     }
 
     private $id = null;
+    private $cocoonId = null;
+    private $countryCode = false;
 
     // memoization
     private $providedCHO = null;
@@ -32,7 +34,6 @@
     private $modified = false;
     private $created = false;
 
-
     public function getProvidedCHO() {
         if(is_null($this->providedCHO)) {
             $this->providedCHO = $this->get("<http://www.europeana.eu/schemas/edm/aggregatedCHO>");
@@ -65,6 +66,21 @@
         return $this->id;
     }
 
+    public function getCocoonId() {
+        if(is_null($this->cocoonId)) {
+            $ids = $this->getProvidedCHO()->all('<http://purl.org/dc/elements/1.1/identifier>');
+            foreach ($ids as $id) {
+                if($id instanceof Literal && strpos($id->getValue(), config('corpusparole.cocoon_doc_id_base')) === 0) {
+                    $this->cocoonId = substr($id->getValue(), strlen(config('corpusparole.cocoon_doc_id_base')));
+                }
+            }
+            if(is_null($this->cocoonId)) {
+                $this->id = CocoonUtils::getCocoonIdFromCorpusUri($this->uri);
+            }
+        }
+        return $this->cocoonId;
+    }
+
     public function getLanguages() {
         if(is_null($this->langs)) {
             try {
@@ -194,6 +210,14 @@
         return is_null($modified)?null:$modified->getValue();
     }
 
+    public function getCountryCode() {
+        return $this->countryCode;
+    }
+
+    public function setCountryCode($code) {
+        $this->countryCode = $code;
+    }
+
 
     public function jsonSerialize() {
         if(!$this->graph) {
@@ -203,6 +227,7 @@
         } else {
             $res = [
                 'id' => $this->getId(),
+                'cocoonId' => $this->getCocoonId(),
                 'uri' => $this->getUri(),
                 'title' => $this->getTitleValue(),
                 'languages' => $this->getLanguagesValue(),
@@ -214,6 +239,9 @@
             if($this->languagesResolved) {
                 $res['languages_resolved'] = $this->getLanguagesResolved();
             }
+            if($this->getCountryCode() !== false) {
+                $res['countryCode'] = $this->getCountryCode();
+            }
 
             return $res;
         }