diff --git a/library/Businessprocess/Renderer/Renderer.php b/library/Businessprocess/Renderer/Renderer.php
index 894b2af..655a108 100644
--- a/library/Businessprocess/Renderer/Renderer.php
+++ b/library/Businessprocess/Renderer/Renderer.php
@@ -76,6 +76,14 @@ abstract class Renderer extends Html
         return $this->parent !== null;
     }
 
+    /**
+     * @return BpNode
+     */
+    public function getParentNode()
+    {
+        return $this->parent;
+    }
+
     /**
      * @return BpNode[]
      */
@@ -196,7 +204,12 @@ abstract class Renderer extends Html
      */
     public function setUrl(Url $url)
     {
-        $this->url = $url->without(array('simulationnode', 'deletenode'));
+        $this->url = $url->without(array(
+            'deletenode',
+            'deleteparent',
+            'editnode',
+            'simulationnode'
+        ));
         $this->setBaseUrl($url);
         return $this;
     }