diff --git a/src/ndns-label.hpp b/src/ndns-label.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014, Regents of the University of California.
+ *
+ * This file is part of NDNS (Named Data Networking Domain Name Service).
+ * See AUTHORS.md for complete list of NDNS authors and contributors.
+ *
+ * NDNS is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NDNS 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
+ * NDNS, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NDNS_NDNS_LABEL_HPP
+#define NDNS_NDNS_LABEL_HPP
+
+#include "ndns-enum.hpp"
+
+#include <ndn-cxx/name.hpp>
+#include <ndn-cxx/interest.hpp>
+
+#include <string>
+
+namespace ndn {
+namespace ndns {
+namespace label {
+
+/**
+ * @brief NDNS iterative query type
+ */
+
+const name::Component NdnsIterativeQuery("NDNS");
+
+/**
+ * @brief NDNS recursive query type
+ */
+const name::Component NdnsRecursiveQuery("NDNS-R");
+
+/**
+ * @brief NDNS ID-CERT query type
+ */
+const name::Component NdnsCertQuery("KEY");
+
+/////////////////////////////////////////////
+
+/**
+ * @brief label of forwarding hint
+ * @todo not support forwarding hint yet, for future use
+ */
+const name::Component ForwardingHintLabel("\xF0.");
+
+/**
+ * @brief label of update message, located at the last component in Interest name
+ */
+const name::Component NdnsUpdateLabel("UPDATE");
+
+//////////////////////////////////////////////
+
+/**
+ * @brief NS resource record type
+ */
+const name::Component NsRrType("NS");
+
+/**
+ * @brief ID-CERT resource record type
+ */
+const name::Component CertRrType("ID-CERT");
+
+//////////////////////////////////////////
+
+/**
+ * @brief result of Matching. version only works when matching a Interest Name
+ */
+struct MatchResult
+{
+  Name rrLabel;
+  name::Component rrType;
+  name::Component version;
+};
+
+/**
+ * @brief match the Interest (NDNS query, NDNS update) name
+ *
+ * @param[in] interest Interest to parse
+ * @param[in] hint Forwarding hint that is part of the Interest
+ *            (only the length will be taken into account)
+ * @param[in] zone Zone that the Interest is related to
+ *            (only the length will be taken into account)
+ * @param[out] result The matching result
+ * @return true if match succeeds, or false
+ */
+bool
+matchName(const Interest& interest,
+           const Name& hint, const Name& zone,
+           MatchResult& result);
+
+/**
+ * @brief match the Data (NDNS query response, NDNS update response) name
+ *
+ * @param[in] data Data to parse
+ * @param[in] hint Forwarding hint that is part of the Data
+ *            (only the length will be taken into account)
+ * @param[in] zone Zone that the Data is related to
+ *            (only the length will be taken into account)
+ * @param[out] result The matching result
+ * @return true if match succeeds, or false
+ */
+bool
+matchName(const Data& data,
+          const Name& hint, const Name& zone,
+          MatchResult& result);
+
+} // namespace label
+} // namespace ndns
+} // namespace ndn
+
+#endif // NDNS_NDNS_LABEL_HPP