diff --git a/src/main/java/com/metaweb/gridworks/protograph/AnonymousNode.java b/src/main/java/com/metaweb/gridworks/protograph/AnonymousNode.java
new file mode 100644
index 000000000..980c9fe1d
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/AnonymousNode.java
@@ -0,0 +1,18 @@
+package com.metaweb.gridworks.protograph;
+
+import java.util.Properties;
+
+import org.json.JSONException;
+import org.json.JSONWriter;
+
+public class AnonymousNode extends Node {
+	private static final long serialVersionUID = -6956243664838720646L;
+
+	@Override
+	public void write(JSONWriter writer, Properties options)
+			throws JSONException {
+		// TODO Auto-generated method stub
+
+	}
+
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/FreebaseProperty.java b/src/main/java/com/metaweb/gridworks/protograph/FreebaseProperty.java
new file mode 100644
index 000000000..6e50544dc
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/FreebaseProperty.java
@@ -0,0 +1,16 @@
+package com.metaweb.gridworks.protograph;
+
+public class FreebaseProperty extends FreebaseTopic {
+	private static final long serialVersionUID = 7909539492956342421L;
+	
+	final protected FreebaseType _expectedType;
+	
+	public FreebaseProperty(String id, String name, FreebaseType expectedType) {
+		super(id, name);
+		_expectedType = expectedType;
+	}
+	
+	public FreebaseType getExpectedType() {
+		return _expectedType;
+	}
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/FreebaseTopic.java b/src/main/java/com/metaweb/gridworks/protograph/FreebaseTopic.java
new file mode 100644
index 000000000..f4b4ee051
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/FreebaseTopic.java
@@ -0,0 +1,37 @@
+package com.metaweb.gridworks.protograph;
+
+import java.io.Serializable;
+import java.util.Properties;
+
+import org.json.JSONException;
+import org.json.JSONWriter;
+
+import com.metaweb.gridworks.Jsonizable;
+
+public class FreebaseTopic implements Serializable, Jsonizable {
+	private static final long serialVersionUID = -3427885694129112432L;
+	
+	final protected String _id;
+	final protected String _name;
+	
+	public FreebaseTopic(String id, String name) {
+		_id = id;
+		_name = name;
+	}
+	
+	public String getID() {
+		return _id;
+	}
+
+	public String getName() {
+		return _name;
+	}
+
+	@Override
+	public void write(JSONWriter writer, Properties options)
+			throws JSONException {
+		// TODO Auto-generated method stub
+
+	}
+
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/FreebaseType.java b/src/main/java/com/metaweb/gridworks/protograph/FreebaseType.java
new file mode 100644
index 000000000..4b6abd9ca
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/FreebaseType.java
@@ -0,0 +1,10 @@
+package com.metaweb.gridworks.protograph;
+
+public class FreebaseType extends FreebaseTopic {
+	private static final long serialVersionUID = -3070300264980791404L;
+
+	public FreebaseType(String id, String name) {
+		super(id, name);
+	}
+
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/Link.java b/src/main/java/com/metaweb/gridworks/protograph/Link.java
new file mode 100644
index 000000000..b96040dd2
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/Link.java
@@ -0,0 +1,37 @@
+package com.metaweb.gridworks.protograph;
+
+import java.io.Serializable;
+import java.util.Properties;
+
+import org.json.JSONException;
+import org.json.JSONWriter;
+
+import com.metaweb.gridworks.Jsonizable;
+
+public class Link implements Serializable, Jsonizable {
+	private static final long serialVersionUID = 2908086768260322876L;
+	
+	final protected FreebaseProperty 	_property;
+	final protected Node				_target;
+	
+	public Link(FreebaseProperty property, Node target) {
+		_property = property;
+		_target = target;
+	}
+	
+	public FreebaseProperty getProperty() {
+		return _property;
+	}
+	
+	public Node getTarget() {
+		return _target;
+	}
+
+	@Override
+	public void write(JSONWriter writer, Properties options)
+			throws JSONException {
+		// TODO Auto-generated method stub
+		
+	}
+
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/NewNode.java b/src/main/java/com/metaweb/gridworks/protograph/NewNode.java
new file mode 100644
index 000000000..b0deca256
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/NewNode.java
@@ -0,0 +1,18 @@
+package com.metaweb.gridworks.protograph;
+
+import java.util.Properties;
+
+import org.json.JSONException;
+import org.json.JSONWriter;
+
+public class NewNode extends Node {
+	private static final long serialVersionUID = 5820786756175547307L;
+
+	@Override
+	public void write(JSONWriter writer, Properties options)
+			throws JSONException {
+		// TODO Auto-generated method stub
+
+	}
+
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/Node.java b/src/main/java/com/metaweb/gridworks/protograph/Node.java
new file mode 100644
index 000000000..8e3602697
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/Node.java
@@ -0,0 +1,10 @@
+package com.metaweb.gridworks.protograph;
+
+import java.io.Serializable;
+
+import com.metaweb.gridworks.Jsonizable;
+
+abstract public class Node implements Serializable, Jsonizable {
+	private static final long serialVersionUID = 2892833010059212143L;
+	
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/TopicNode.java b/src/main/java/com/metaweb/gridworks/protograph/TopicNode.java
new file mode 100644
index 000000000..84d436a18
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/protograph/TopicNode.java
@@ -0,0 +1,23 @@
+package com.metaweb.gridworks.protograph;
+
+import java.util.Properties;
+
+import org.json.JSONException;
+import org.json.JSONWriter;
+
+public class TopicNode extends Node {
+	private static final long serialVersionUID = 8418548867745587387L;
+
+	final protected FreebaseTopic _topic;
+	
+	public TopicNode(FreebaseTopic topic) {
+		_topic = topic;
+	}
+
+	@Override
+	public void write(JSONWriter writer, Properties options)
+			throws JSONException {
+		// TODO Auto-generated method stub
+		
+	}
+}