diff --git a/model/ndn-data.h b/model/ndn-data.h
new file mode 100644
index 0000000..4d51d37
--- /dev/null
+++ b/model/ndn-data.h
@@ -0,0 +1,221 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011-2013 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: Ilya Moiseenko <iliamo@cs.ucla.edu>
+ *         Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef _NDN_CONTENT_OBJECT_HEADER_H_
+#define _NDN_CONTENT_OBJECT_HEADER_H_
+
+#include "ns3/simple-ref-count.h"
+#include "ns3/nstime.h"
+#include "ns3/packet.h"
+#include "ns3/ptr.h"
+
+#include <ns3/ndn-name.h>
+
+namespace ns3 {
+namespace ndn {
+
+/**
+ * @ingroup ndn
+ * @brief Data header
+ */
+class Data : public SimpleRefCount<Data>
+{
+public:
+  /**
+   * @brief Constructor
+   *
+   * Creates a null header
+   **/
+  Data (Ptr<Packet> payload = Create<Packet> ());
+
+  /**
+   * @brief Copy constructor
+   */
+  Data (const Data &other);
+
+  /**
+   * \brief Set content object name
+   *
+   * Sets name of the content object
+   **/
+  void
+  SetName (Ptr<Name> name);
+
+  /**
+   * @brief Another, less efficient, variant of setting content object name
+   *
+   * Sets name of the content object
+   */
+  void
+  SetName (const Name &name);
+  
+  /**
+   * @brief Get name of the content object
+   */
+  const Name&
+  GetName () const;
+
+  /**
+   * @brief Get smart pointer to the interest name (to avoid extra memory usage)
+   */
+  Ptr<const Name>
+  GetNamePtr () const;
+
+  /**
+   * @brief Set content object timestamp
+   * @param timestamp timestamp
+   */
+  void
+  SetTimestamp (const Time &timestamp);
+
+  /**
+   * @brief Get timestamp of the content object
+   */
+  Time
+  GetTimestamp () const;
+
+  /**
+   * @brief Set freshness of the content object
+   * @param freshness Freshness, 0s means infinity
+   */
+  void
+  SetFreshness (const Time &freshness);
+
+  /**
+   * @brief Get freshness of the content object
+   */
+  Time
+  GetFreshness () const;
+
+  /**
+   * @brief Set "fake" signature on the content object
+   * @param signature  uint32_t number, simulating content object signature
+   *
+   * Values for the signature totally depend on the application
+   */
+  void
+  SetSignature (uint32_t signature);
+
+  /**
+   * @brief Get "fake" signature of the content object
+   *
+   * Values for the signature totally depend on the application
+   */
+  uint32_t
+  GetSignature () const;
+
+  /**
+   * @brief Set key locator
+   * @param keyLocator name of the key
+   */
+  void
+  SetKeyLocator (Ptr<Name> keyLocator);
+
+  /**
+   * @brief Get key locator
+   *
+   * Note that only <KeyName> option for the key locator is supported
+   */
+  Ptr<const Name>
+  GetKeyLocator () const;
+  
+  //////////////////////////////////////////////////////////////////
+  /**
+   * @brief Get payload of data packet
+   *
+   * This payload can also carry packet tags
+   */
+  void
+  SetPayload (Ptr<Packet> payload);
+
+  /**
+   * @brief Set payload of data packet
+   *
+   * This payload can also carry packet tags
+   */
+  Ptr<const Packet>
+  GetPayload () const;
+  
+  /**
+   * @brief Get wire formatted packet
+   *
+   * If wire formatted packet has not been set before, 0 will be returned
+   */
+  inline Ptr<const Packet>
+  GetWire () const;
+
+  /**
+   * @brief Set (cache) wire formatted packet
+   */
+  inline void
+  SetWire (Ptr<const Packet> packet) const;
+
+  /**
+   * @brief Print Interest in plain-text to the specified output stream
+   */
+  void
+  Print (std::ostream &os) const;
+  
+private:
+  // NO_ASSIGN
+  Data &
+  operator = (const Data &other) { return *this; }
+  
+private:
+  Ptr<Name> m_name;
+  Time m_freshness;
+  Time m_timestamp;
+  uint32_t m_signature; // 0, means no signature, any other value application dependent (not a real signature)
+  Ptr<Packet> m_payload;
+  Ptr<Name> m_keyLocator;
+
+  mutable Ptr<const Packet> m_wire;
+};
+
+inline std::ostream &
+operator << (std::ostream &os, const Data &d)
+{
+  d.Print (os);
+  return os;
+}
+
+/**
+ * @brief Class for Data parsing exception
+ */
+class DataException {};
+
+inline Ptr<const Packet>
+Data::GetWire () const
+{
+  return m_wire;
+}
+
+inline void
+Data::SetWire (Ptr<const Packet> packet) const
+{
+  m_wire = packet;
+}
+
+
+} // namespace ndn
+} // namespace ns3
+
+#endif // _NDN_CONTENT_OBJECT_HEADER_H_