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diff --git a/src/main/java/com/kitfox/svg/animation/TrackManager.java b/src/main/java/com/kitfox/svg/animation/TrackManager.java
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+/*
+ * TrackManager.java
+ *
+ *  The Salamander Project - 2D and 3D graphics libraries in Java
+ *  Copyright (C) 2004 Mark McKay
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *  Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
+ *  projects can be found at http://www.kitfox.com
+ *
+ * Created on August 15, 2004, 11:34 PM
+ */
+
+package com.kitfox.svg.animation;
+
+import java.util.*;
+
+import com.kitfox.svg.*;
+import java.io.Serializable;
+
+/**
+ * Every element contains tracks, which manage the animation.  There is one track
+ * for every parameter with animation, and each track in turn is composed of
+ * many events.
+ *
+ * @author Mark McKay
+ * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
+ */
+public class TrackManager implements Serializable
+{
+    public static final long serialVersionUID = 0;
+    
+    static class TrackKey
+    {
+        String name;
+        int type;
+        
+        TrackKey(AnimationElement base)
+        {
+            this(base.getAttribName(), base.getAttribType());
+        }
+        
+        TrackKey(String name, int type)
+        {
+            this.name = name;
+            this.type = type;
+        }
+        
+        public int hashCode() { return name.hashCode() ^ type; } 
+        public boolean equals(Object obj) 
+        {
+            if (!(obj instanceof TrackKey)) return false;
+            TrackKey key = (TrackKey)obj;
+            return key.type == type && key.name.equals(name);
+        }
+    }
+    
+    HashMap tracks = new HashMap();
+    
+    /** Creates a new instance of TrackManager */
+    public TrackManager()
+    {
+    }
+    
+    /**
+     * Adds a new animation element to this track
+     */
+    public void addTrackElement(AnimationElement element) throws SVGElementException
+    {
+        TrackKey key = new TrackKey(element);
+        
+        TrackBase track = (TrackBase)tracks.get(key);
+        
+        if (track == null)
+        {
+            //Create a track for this element
+            if (element instanceof Animate)
+            {
+                switch (((Animate)element).getDataType())
+                {
+                    case Animate.DT_REAL:
+                        track = new TrackDouble(element);
+                        break;
+                    case Animate.DT_COLOR:
+                        track = new TrackColor(element);
+                        break;
+                    case Animate.DT_PATH:
+                        track = new TrackPath(element);
+                        break;
+                    default:
+                        throw new RuntimeException("");
+                }
+            }
+            else if (element instanceof AnimateColor)
+            {
+                track = new TrackColor(element);
+            }
+            else if (element instanceof AnimateTransform || element instanceof AnimateMotion)
+            {
+                track = new TrackTransform(element);
+            }
+            
+            tracks.put(key, track);
+        }
+  
+        track.addElement(element);
+    }
+    
+    public TrackBase getTrack(String name, int type)
+    {
+        //Handle AUTO, which will match either CSS or XML (in that order)
+        if (type == AnimationElement.AT_AUTO)
+        {
+            TrackBase t = getTrack(name, AnimationElement.AT_CSS);
+            if (t != null) return t;
+            t = getTrack(name, AnimationElement.AT_XML);
+            if (t != null) return t;
+            return null;
+        }
+        
+        //Get requested attribute
+        TrackKey key = new TrackKey(name, type);
+        TrackBase t = (TrackBase)tracks.get(key);
+        if (t != null) return t;
+        
+        //If that didn't exist, see if one exists of type AUTO
+        key = new TrackKey(name, AnimationElement.AT_AUTO);
+        return (TrackBase)tracks.get(key);
+    }
+    
+    public int getNumTracks()
+    {
+        return tracks.size();
+    }
+    
+    public Iterator iterator()
+    {
+        return tracks.values().iterator();
+    }
+}