--- a/playground/jsonld.js	Sat Apr 21 15:38:53 2012 -0400
+++ b/playground/jsonld.js	Sun Apr 22 00:57:38 2012 -0400
@@ -3562,9 +3562,6 @@
   if(oldName) {
     this.existing[oldName] = name;
   }
-  else {
-    this.existing[name] = name;
-  }
 
   return name;
 };