diff --git a/core/scope-prefix.hpp b/core/scope-prefix.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2018,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD 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.
+ *
+ * NFD 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
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_CORE_SCOPE_PREFIX_HPP
+#define NFD_CORE_SCOPE_PREFIX_HPP
+
+#include "common.hpp"
+
+/** \brief contain name prefixes that affect namespace-based scope control
+ *  \sa https://redmine.named-data.net/projects/nfd/wiki/ScopeControl
+ */
+namespace nfd {
+namespace scope_prefix {
+
+/** \brief ndn:/localhost
+ *
+ *  The localhost scope limits propagation to the applications on the originating host.
+ *
+ *  Interest and Data packets under prefix ndn:/localhost are restricted by these rules:
+ *  \li Interest can come from and go to local faces only.
+ *  \li Data can come from and go to local faces only.
+ */
+extern const Name LOCALHOST;
+
+/** \brief ndn:/localhop
+ *
+ *  The localhop scope limits propagation to no further than the next node.
+ *
+ *  Interest packets under prefix ndn:/localhop are restricted by these rules:
+ *  \li If an Interest is received from a local face, it can be forwarded to a non-local face.
+ *  \li If an Interest is received from a non-local face, it cannot be forwarded to a non-local face.
+ *  \li In either case the Interest can be forwarded to a local face.
+ *  \li PIT entry can be satisfied by Data from any source.
+ *
+ *  Data packets under prefix ndn:/localhop are unrestricted.
+ */
+extern const Name LOCALHOP;
+
+} // namespace scope_prefix
+} // namespace nfd
+
+#endif // NFD_CORE_SCOPE_PREFIX_HPP