diff --git a/helper/ccnb-parser/syntax-tree/tag.cc b/helper/ccnb-parser/syntax-tree/tag.cc
new file mode 100644
index 0000000..5a0d96c
--- /dev/null
+++ b/helper/ccnb-parser/syntax-tree/tag.cc
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#include "tag.h"
+
+#include "base-attr.h"
+
+namespace ns3 {
+namespace ndn {
+namespace CcnbParser {
+
+Tag::Tag (Buffer::Iterator &start, uint32_t length)
+{
+  m_tag.reserve (length+2); // extra byte for potential \0 at the end
+  uint32_t i = 0;
+  for (; !start.IsEnd () && i < (length+1); i++)
+    {
+      m_tag.push_back (start.ReadU8 ());
+    }
+  if (i < (length+1) && start.IsEnd ())
+    throw CcnbDecodingException ();
+  
+  // parse attributes until first nested block reached
+  while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE)
+    {
+      Ptr<Block> block = Block::ParseBlock (start);
+      if (DynamicCast<BaseAttr> (block)!=0)
+		m_attrs.push_back (block);
+	  else
+		{
+		  m_nestedTags.push_back (block);
+		  break;
+		}
+	}
+
+  // parse the rest of nested blocks
+  while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE)
+    {
+      Ptr<Block> block = Block::ParseBlock (start);
+	  m_nestedTags.push_back (block);
+    }
+  
+  if (start.IsEnd ()) //should not be the end
+      throw CcnbDecodingException ();
+
+  start.ReadU8 (); // read CCN_CLOSE
+}
+
+}
+}
+}