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diff --git a/include/datetime/state.h b/include/datetime/state.h
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+/*
+ * Copyright 2013 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, 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 warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ */
+
+#ifndef INDICATOR_DATETIME_STATE_H
+#define INDICATOR_DATETIME_STATE_H
+
+#include <datetime/clock.h>
+#include <datetime/locations.h>
+#include <datetime/planner.h>
+#include <datetime/settings.h>
+#include <datetime/timezones.h>
+   
+#include <core/property.h>
+
+#include <memory> // std::shared_ptr
+
+namespace unity {
+namespace indicator {
+namespace datetime {
+
+/**
+ * \brief Aggregates all the classes that represent the backend state.
+ *
+ * This is where the app comes together. It's a model that aggregates
+ * all of the backend appointments/alarms, locations, timezones,
+ * system time, and so on. The "view" code (ie, the Menus) need to
+ * respond to Signals from the State and update themselves accordingly.
+ *
+ * @see Menu
+ * @see MenuFactory
+ * @see Timezones
+ * @see Clock
+ * @see Planner
+ * @see Locations
+ * @see Settings
+ */
+struct State
+{
+    /** \brief The current time. Used by the header, by the date menuitem,
+               and by the locations for relative timestamp */
+    std::shared_ptr<Clock> clock;
+
+    /** \brief The locations to be displayed in the Locations
+               section of the #Menu */
+    std::shared_ptr<Locations> locations;
+
+    /** \brief The appointments to be displayed in the Calendar and
+               Appointments sections of the #Menu */
+    std::shared_ptr<Planner> planner;
+
+    /** \brief Configuration options that modify the view */
+    std::shared_ptr<Settings> settings;
+};
+
+} // namespace datetime
+} // namespace indicator
+} // namespace unity
+
+#endif // INDICATOR_DATETIME_STATE_H