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diff --git a/src/base/BaseProperties.cpp b/src/base/BaseProperties.cpp
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+/*
+    Rosegarden
+    A sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <glaurent@telegraph-road.org>,
+        Chris Cannam        <cannam@all-day-breakfast.com>,
+        Richard Bown        <bownie@bownie.com>
+
+    The moral right of the authors to claim authorship of this work
+    has been asserted.
+
+    This program 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 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "BaseProperties.h"
+#include <vector>
+
+#if (__GNUC__ < 3)
+#include <strstream>
+#define stringstream strstream
+#else
+#include <sstream>
+#endif
+
+namespace Rosegarden
+{
+
+namespace BaseProperties
+{
+
+// Some of the most basic property names are defined in individual
+// classes in NotationTypes.h -- those are the ones that are used to
+// store the value of a clef/key/timesig event, whereas things like
+// notes have their values calculated from the duration property.
+
+// We mostly define persistent properties with lower-case names and
+// non-persistent ones with mixed-case.  That's just because lower-
+// case looks nicer in XML, whereas mixed-case is friendlier for the
+// sorts of long names sometimes found in cached calculations.
+
+const PropertyName PITCH		= "pitch";
+const PropertyName VELOCITY		= "velocity";
+const PropertyName ACCIDENTAL		= "accidental";
+
+const PropertyName NOTE_TYPE            = "notetype";
+const PropertyName NOTE_DOTS            = "notedots";
+
+const PropertyName MARK_COUNT		= "marks";
+
+PropertyName getMarkPropertyName(int markNo)
+{
+    static std::vector<PropertyName> firstFive;
+
+    if (firstFive.size() == 0) {
+	firstFive.push_back(PropertyName("mark1"));
+	firstFive.push_back(PropertyName("mark2"));
+	firstFive.push_back(PropertyName("mark3"));
+	firstFive.push_back(PropertyName("mark4"));
+	firstFive.push_back(PropertyName("mark5"));
+    }
+
+    if (markNo < 5) return firstFive[markNo];
+
+    // This is slower than it looks, because it means we need to do
+    // the PropertyName interning process for each string -- hence the
+    // firstFive cache
+
+    std::stringstream markPropertyName;
+
+#if (__GNUC__ < 3)
+    markPropertyName << "mark" << (markNo + 1) << std::ends;
+#else
+    markPropertyName << "mark" << (markNo + 1);
+#endif
+
+    return markPropertyName.str();
+}
+
+const PropertyName TIED_BACKWARD	= "tiedback";
+const PropertyName TIED_FORWARD		= "tiedforward";
+const PropertyName TIE_IS_ABOVE		= "tieabove";
+
+// capitalised for back-compatibility (used to be in NotationProperties)
+const PropertyName HEIGHT_ON_STAFF      = "HeightOnStaff";
+const PropertyName NOTE_STYLE		= "NoteStyle";
+const PropertyName BEAMED		= "Beamed";
+
+const PropertyName BEAMED_GROUP_ID               = "groupid";
+const PropertyName BEAMED_GROUP_TYPE		 = "grouptype";
+
+const PropertyName BEAMED_GROUP_TUPLET_BASE	 = "tupletbase";
+const PropertyName BEAMED_GROUP_TUPLED_COUNT	 = "tupledcount";
+const PropertyName BEAMED_GROUP_UNTUPLED_COUNT	 = "untupledcount";
+
+// persistent, but mixed-case anyway
+const PropertyName IS_GRACE_NOTE                 = "IsGraceNote";
+
+// obsolete
+const PropertyName HAS_GRACE_NOTES               = "HasGraceNotes";
+
+// non-persistent
+const PropertyName MAY_HAVE_GRACE_NOTES          = "MayHaveGraceNotes";
+
+const std::string GROUP_TYPE_BEAMED		 = "beamed";
+const std::string GROUP_TYPE_TUPLED		 = "tupled";
+const std::string GROUP_TYPE_GRACE		 = "grace";
+
+const PropertyName TRIGGER_SEGMENT_ID            = "triggersegmentid";
+const PropertyName TRIGGER_SEGMENT_RETUNE        = "triggersegmentretune";
+const PropertyName TRIGGER_SEGMENT_ADJUST_TIMES  = "triggersegmentadjusttimes";
+
+const std::string TRIGGER_SEGMENT_ADJUST_NONE = "none";
+const std::string TRIGGER_SEGMENT_ADJUST_SQUISH = "squish";
+const std::string TRIGGER_SEGMENT_ADJUST_SYNC_START = "syncstart";
+const std::string TRIGGER_SEGMENT_ADJUST_SYNC_END = "syncend";
+
+const PropertyName RECORDED_CHANNEL		 = "recordedchannel";
+const PropertyName RECORDED_PORT		 = "recordedport";
+
+const PropertyName DISPLACED_X                   = "displacedx";
+const PropertyName DISPLACED_Y                   = "displacedy";
+
+const PropertyName INVISIBLE                     = "invisible";
+
+}
+
+}
+