First step of refactoring code (ccnx prefix => ndn prefix)
diff --git a/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h b/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h
index 5ac08bf..1f9d1fa 100644
--- a/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h
+++ b/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h
@@ -28,7 +28,7 @@
 namespace CcnbParser {
 
 /**
- * \ingroup ccnx-ccnb
+ * \ingroup ndn-ccnb
  * \brief Visitor interface that takes one boost::any argument and returns nothing
  *
  * \see http://www.ccnx.org/releases/latest/doc/technical/BinaryEncoding.html