diff --git a/src/tlv/adjacency.hpp b/src/tlv/adjacency.hpp
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+++ b/src/tlv/adjacency.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2015,  The University of Memphis,
+ *                           Regents of the University of California,
+ *                           Arizona Board of Regents.
+ *
+ * This file is part of NLSR (Named-data Link State Routing).
+ * See AUTHORS.md for complete list of NLSR authors and contributors.
+ *
+ * NLSR 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.
+ *
+ * NLSR 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
+ * NLSR, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#ifndef NLSR_TLV_ADJACENCY_HPP
+#define NLSR_TLV_ADJACENCY_HPP
+
+#include <ndn-cxx/util/time.hpp>
+#include <ndn-cxx/encoding/block.hpp>
+#include <ndn-cxx/encoding/encoding-buffer.hpp>
+#include <ndn-cxx/encoding/tlv.hpp>
+#include <ndn-cxx/name.hpp>
+
+namespace nlsr {
+namespace tlv  {
+
+/**
+ * @brief Data abstraction for Adjacency
+ *
+ * Adjacency := ADJACENCY-TYPE TLV-LENGTH
+ *                Name
+ *                Uri
+ *                Cost
+ *
+ * @sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
+ */
+class Adjacency
+{
+public:
+  class Error : public ndn::tlv::Error
+  {
+  public:
+    explicit
+    Error(const std::string& what)
+      : ndn::tlv::Error(what)
+    {
+    }
+  };
+
+  Adjacency();
+
+  explicit
+  Adjacency(const ndn::Block& block);
+
+  const ndn::Name&
+  getName() const
+  {
+    return m_name;
+  }
+
+  Adjacency&
+  setName(const ndn::Name& name)
+  {
+    m_name = name;
+    m_wire.reset();
+    return *this;
+  }
+
+  const std::string&
+  getUri() const
+  {
+    return m_uri;
+  }
+
+  Adjacency&
+  setUri(const std::string& uri)
+  {
+    m_uri = uri;
+    m_wire.reset();
+    return *this;
+  }
+
+  uint64_t
+  getCost() const
+  {
+    return m_cost;
+  }
+
+  Adjacency&
+  setCost(uint64_t cost)
+  {
+    m_cost = cost;
+    m_wire.reset();
+    return *this;
+  }
+
+  template<bool T>
+  size_t
+  wireEncode(ndn::EncodingImpl<T>& block) const;
+
+  const ndn::Block&
+  wireEncode() const;
+
+  void
+  wireDecode(const ndn::Block& wire);
+
+private:
+  ndn::Name m_name;
+  std::string m_uri;
+  uint64_t m_cost;
+
+  mutable ndn::Block m_wire;
+};
+
+std::ostream&
+operator<<(std::ostream& os, const Adjacency& adjacency);
+
+} // namespace tlv
+} // namespace nlsr
+
+#endif // NLSR_TLV_ADJACENCY_HPP