diff --git a/nsync/src/sync-logic-event-container.h b/nsync/src/sync-logic-event-container.h
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+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 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: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         Chaoyi Bian <bcy@pku.edu.cn>
+ *	   Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef SYNC_LOGIC_EVENT_CONTAINER_H
+#define SYNC_LOGIC_EVENT_CONTAINER_H
+
+#include "sync-event.h"
+
+#include <boost/function.hpp>
+#include <boost/date_time/posix_time/posix_time_types.hpp>
+
+#include <boost/multi_index_container.hpp>
+// #include <boost/multi_index/tag.hpp>
+#include <boost/multi_index/ordered_index.hpp>
+// #include <boost/multi_index/composite_key.hpp>
+// #include <boost/multi_index/hashed_index.hpp>
+// #include <boost/multi_index/random_access_index.hpp>
+#include <boost/multi_index/member.hpp>
+// #include <boost/multi_index/mem_fun.hpp>
+
+namespace mi = boost::multi_index;
+
+namespace Sync
+{
+
+struct LogicEvent
+{
+  LogicEvent (const boost::system_time &_time, Event _event, uint32_t _label)
+    : time (_time)
+    , event (_event)
+    , lbl (_label)
+  { }
+  
+  boost::system_time time;
+  Event event;
+  uint32_t lbl;
+};
+
+/// @cond include_hidden
+struct byLabel { } ;
+/// @endcond
+
+/**
+ * \ingroup sync
+ * @brief ???
+ */
+struct EventsContainer : public mi::multi_index_container<
+  LogicEvent,
+  mi::indexed_by<
+
+    mi::ordered_non_unique<
+      mi::member<LogicEvent, boost::system_time, &LogicEvent::time>
+      >,
+
+    mi::ordered_non_unique<
+      mi::tag<byLabel>,
+      mi::member<LogicEvent, uint32_t, &LogicEvent::lbl>
+      >
+    >
+  >
+{
+};
+
+} // Sync
+
+#endif // SYNC_LOGIC_EVENT_CONTAINER_H