Checkpoint. Reorganizing ccnb parsing into many small files.
diff --git a/helper/ccnb-parser/syntax-tree/ccnb-parser-base-tag.h b/helper/ccnb-parser/syntax-tree/ccnb-parser-base-tag.h
new file mode 100644
index 0000000..bfd1f5b
--- /dev/null
+++ b/helper/ccnb-parser/syntax-tree/ccnb-parser-base-tag.h
@@ -0,0 +1,51 @@
+/* -*- 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>
+ */
+
+#ifndef _CCNB_PARSER_BASE_TAG_H_
+#define _CCNB_PARSER_BASE_TAG_H_
+
+#include "ccnb-parser-block.h"
+#include <list>
+
+namespace ns3 {
+namespace CcnbParser {
+
+/**
+ * \ingroup ccnx-ccnb
+ * \brief Virtual base class providing a common storage for TAG
+ * and DTAG ccnb-encoded blocks
+ *
+ * \see http://www.ccnx.org/releases/latest/doc/technical/BinaryEncoding.html
+ */
+class BaseTag : public Block
+{
+public:
+ std::list<Ptr<Block> > m_attrs; ///< \brief List of attributes, associated with this tag
+ std::list<Ptr<Block> > m_nestedTags; ///< \brief List of nested tags
+
+protected:
+ /**
+ * \brief Default constructor
+ */
+ BaseTag() { }
+};
+
+#endif // _CCNB_PARSER_BASE_TAG_H_
+