diff --git a/src/main/java/net/onrc/onos/ofcontroller/topology/TopologyElement.java b/src/main/java/net/onrc/onos/ofcontroller/topology/TopologyElement.java
new file mode 100644
index 0000000..6809125
--- /dev/null
+++ b/src/main/java/net/onrc/onos/ofcontroller/topology/TopologyElement.java
@@ -0,0 +1,90 @@
+package net.onrc.onos.ofcontroller.topology;
+
+/**
+ * Class for storing information about a Topology Element: Switch, Port or
+ * Link.
+ */
+public class TopologyElement {
+    /**
+     * The Element Type.
+     */
+    enum Type {
+	ELEMENT_SWITCH,		// Network Switch
+	ELEMENT_PORT,		// Switch Port
+	ELEMENT_LINK		// Unidirectional Link between Switch Ports
+    }
+
+    private Type elementType;		// The element type
+    private long fromSwitchDpid = 0;	// The Switch DPID
+    private int fromSwitchPort = 0;	// The Switch Port
+    private long toSwitchDpid = 0;	// The Neighbor Switch DPID
+    private int toSwitchPort = 0;	// The Neighbor Switch Port
+
+    /**
+     * Constructor to create a Topology Element for a Switch.
+     *
+     * @param switchDpid the Switch DPID.
+     */
+    public TopologyElement(long switchDpid) {
+	this.elementType = Type.ELEMENT_SWITCH;
+	this.fromSwitchDpid = switchDpid;
+    }
+
+    /**
+     * Constructor to create a Topology Element for a Switch Port.
+     *
+     * @param switchDpid the Switch DPID.
+     * @param switchPort the Switch Port.
+     */
+    public TopologyElement(long switchDpid, int switchPort) {
+	this.elementType = Type.ELEMENT_PORT;
+	this.fromSwitchDpid = switchDpid;
+	this.fromSwitchPort = switchPort;
+    }
+
+    /**
+     * Constructor to create a Topology Element for an unidirectional Link
+     * between Switch Ports.
+     *
+     * @param fromSwitchDpid the Switch DPID the Link begins from.
+     * @param fromSwitchPort the Switch Port the Link begins from.
+     * @param toSwitchDpid the Switch DPID the Link ends to.
+     * @param toSwitchPort the Switch Port the Link ends to.
+     */
+    public TopologyElement(long fromSwitchDpid, int fromSwitchPort,
+			   long toSwitchDpid, int toSwitchPort) {
+	this.elementType = Type.ELEMENT_LINK;
+	this.fromSwitchDpid = fromSwitchDpid;
+	this.fromSwitchPort = fromSwitchPort;
+	this.toSwitchDpid = toSwitchDpid;
+	this.toSwitchPort = toSwitchPort;
+    }
+
+    /**
+     * Get the Topology Element ID.
+     *
+     * The Topology Element ID has the following format:
+     *   - Switch: "Switch=<Dpid>"
+     *     Example: "Switch=00:00:00:00:00:00:00:01"
+     *   - Switch Port: "Port=<Dpid>/<PortId>"
+     *     Example: "Port=00:00:00:00:00:00:00:01/1"
+     *   - Link: "Link=<FromDpid>/<FromPortId>/<ToDpid>/<ToPortId>"
+     *     Example: "Link=00:00:00:00:00:00:00:01/1/00:00:00:00:00:00:00:02/1"
+     *
+     * @return the Topology Element ID.
+     */
+    public String elementId() {
+	switch (elementType) {
+	case ELEMENT_SWITCH:
+	    return "Switch=" + fromSwitchDpid;
+	case ELEMENT_PORT:
+	    return "Port=" + fromSwitchDpid + "/" + fromSwitchPort;
+	case ELEMENT_LINK:
+	    return "Link=" + fromSwitchDpid + "/" + fromSwitchPort +
+		toSwitchDpid + "/" + toSwitchPort;
+	}
+
+	assert(false);
+	return null;
+    }
+}