diff --git a/titan/schema/test-network.xml b/titan/schema/test-network.xml
new file mode 100644
index 0000000..a03a99c
--- /dev/null
+++ b/titan/schema/test-network.xml
@@ -0,0 +1,237 @@
+<?xml version="1.0" ?>
+<graphml xmlns="http://graphml.graphdrawing.org/xmlns">
+
+    <key id="id" for="node" attr.name="id" attr.type="string"></key>
+    <key id="type" for="node" attr.name="type" attr.type="string"></key>
+    <key id="dpid" for="node" attr.name="dpid" attr.type="string"></key>
+    <key id="desc" for="node" attr.name="desc" attr.type="string"></key>
+    <key id="number" for="node" attr.name="number" attr.type="int"></key>
+    <key id="dl_addr" for="node" attr.name="dl_addr" attr.type="string"></key>
+    <key id="nw_addr" for="node" attr.name="nw_addr" attr.type="string"></key>
+    <key id="id" for="edge" attr.name="id" attr.type="string"></key>
+    <key id="source" for="edge" attr.name="source" attr.type="string"></key>
+    <key id="target" for="edge" attr.name="target" attr.type="string"></key>
+    <key id="label" for="edge" attr.name="label" attr.type="string"></key>
+
+    <graph id="G" edgedefault="directed">
+        <node id="1">
+            <data key="type">switch</data>
+            <data key="dpid">00:00:00:00:00:00:0a:01</data>
+            <data key="desc">OpenFlow Switch at SEA</data>
+        </node>
+        <node id="2">
+            <data key="type">switch</data>
+            <data key="dpid">00:00:00:00:00:00:0a:02</data>
+            <data key="desc">OpenFlow Switch at LAX</data>
+        </node>
+        <node id="3">
+            <data key="type">switch</data>
+            <data key="dpid">00:00:00:00:00:00:0a:03</data>
+            <data key="desc">OpenFlow Switch at CHI</data>
+        </node>
+        <node id="4">
+            <data key="type">switch</data>
+            <data key="dpid">00:00:00:00:00:00:0a:04</data>
+            <data key="desc">OpenFlow Switch at IAH</data>
+        </node>
+        <node id="5">
+            <data key="type">switch</data>
+            <data key="dpid">00:00:00:00:00:00:0a:05</data>
+            <data key="desc">OpenFlow Switch at NYC</data>
+        </node>
+        <node id="6">
+            <data key="type">switch</data>
+            <data key="dpid">00:00:00:00:00:00:0a:06</data>
+            <data key="desc">OpenFlow Switch at ATL</data>
+        </node>
+
+        <node id="100">
+            <data key="type">port</data>
+            <data key="number">1</data>
+            <data key="desc">port 1 at SEA Switch</data>
+        </node>
+        <node id="101">
+            <data key="type">port</data>
+            <data key="number">2</data>
+            <data key="desc">port 2 at SEA Switch</data>
+        </node>
+        <node id="102">
+            <data key="type">port</data>
+            <data key="number">3</data>
+            <data key="desc">port 3 at SEA Switch</data>
+        </node>
+        <node id="103">
+            <data key="type">port</data>
+            <data key="number">4</data>
+            <data key="desc">port 4 at SEA Switch</data>
+        </node>
+
+        <node id="104">
+            <data key="type">port</data>
+            <data key="number">1</data>
+            <data key="desc">port 1 at LAX Switch</data>
+        </node>
+        <node id="105">
+            <data key="type">port</data>
+            <data key="number">2</data>
+            <data key="desc">port 2 at LAX Switch</data>
+        </node>
+        <node id="106">
+            <data key="type">port</data>
+            <data key="number">3</data>
+            <data key="desc">port 3 at LAX Switch</data>
+        </node>
+
+        <node id="107">
+            <data key="type">port</data>
+            <data key="number">1</data>
+            <data key="desc">port 1 at CHI Switch</data>
+        </node>
+        <node id="108">
+            <data key="type">port</data>
+            <data key="number">2</data>
+            <data key="desc">port 2 at CHI Switch</data>
+        </node>
+        <node id="109">
+            <data key="type">port</data>
+            <data key="number">3</data>
+            <data key="desc">port 3 at CHI Switch</data>
+        </node>
+        <node id="110">
+            <data key="type">port</data>
+            <data key="number">4</data>
+            <data key="desc">port 4 at CHI Switch</data>
+        </node>
+
+        <node id="111">
+            <data key="type">port</data>
+            <data key="number">1</data>
+            <data key="desc">port 1 at IAH Switch</data>
+        </node>
+        <node id="112">
+            <data key="type">port</data>
+            <data key="number">2</data>
+            <data key="desc">port 2 at IAH Switch</data>
+        </node>
+        <node id="113">
+            <data key="type">port</data>
+            <data key="number">3</data>
+            <data key="desc">port 3 at IAH Switch</data>
+        </node>
+
+        <node id="114">
+            <data key="type">port</data>
+            <data key="number">1</data>
+            <data key="desc">port 1 at NYC Switch</data>
+        </node>
+        <node id="115">
+            <data key="type">port</data>
+            <data key="number">2</data>
+            <data key="desc">port 2 at NYC Switch</data>
+        </node>
+        <node id="116">
+            <data key="type">port</data>
+            <data key="number">3</data>
+            <data key="desc">port 3 at NYC Switch</data>
+        </node>
+
+        <node id="117">
+            <data key="type">port</data>
+            <data key="number">1</data>
+            <data key="desc">port 1 at ATL Switch</data>
+        </node>
+        <node id="118">
+            <data key="type">port</data>
+            <data key="number">2</data>
+            <data key="desc">port 2 at ATL Switch</data>
+        </node>
+        <node id="119">
+            <data key="type">port</data>
+            <data key="number">3</data>
+            <data key="desc">port 3 at ATL Switch</data>
+        </node>
+
+        <node id="1000">
+            <data key="type">device</data>
+            <data key="dl_addr">20:c9:d0:4a:e1:73</data>
+            <data key="nw_addr">192.168.10.101</data>
+        </node>
+        <node id="1001">
+            <data key="type">device</data>
+            <data key="dl_addr">20:c9:d0:4a:e1:62</data>
+            <data key="nw_addr">192.168.20.101</data>
+        </node>
+        <node id="1002">
+            <data key="type">device</data>
+            <data key="dl_addr">10:40:f3:e6:8d:55</data>
+            <data key="nw_addr">192.168.10.1</data>
+        </node>
+        <node id="1003">
+            <data key="type">device</data>
+            <data key="dl_addr">a0:b3:cc:9c:c6:88</data>
+            <data key="nw_addr">192.168.20.1</data>
+        </node>
+        <node id="1004">
+            <data key="type">device</data>
+            <data key="dl_addr">00:04:20:e2:50:a2</data>
+            <data key="nw_addr">192.168.30.1</data>
+        </node>
+        <node id="1005">
+            <data key="type">device</data>
+            <data key="dl_addr">58:55:ca:c4:1b:a0</data>
+            <data key="nw_addr">192.168.40.1</data>
+        </node>
+
+        <edge id="10000" source="1" target="101" label="on"></edge>
+        <edge id="10001" source="1" target="102" label="on"></edge>
+        <edge id="10002" source="1" target="103" label="on"></edge>
+
+        <edge id="10003" source="2" target="104" label="on"></edge>
+        <edge id="10004" source="2" target="105" label="on"></edge>
+        <edge id="10005" source="2" target="106" label="on"></edge>
+
+        <edge id="10006" source="3" target="107" label="on"></edge>
+        <edge id="10007" source="3" target="108" label="on"></edge>
+        <edge id="10008" source="3" target="109" label="on"></edge>
+        <edge id="10009" source="3" target="110" label="on"></edge>
+
+        <edge id="10010" source="4" target="111" label="on"></edge>
+        <edge id="10011" source="4" target="112" label="on"></edge>
+        <edge id="10012" source="4" target="113" label="on"></edge>
+
+        <edge id="10013" source="5" target="114" label="on"></edge>
+        <edge id="10014" source="5" target="115" label="on"></edge>
+        <edge id="10015" source="5" target="116" label="on"></edge>
+
+        <edge id="10016" source="6" target="117" label="on"></edge>
+        <edge id="10017" source="6" target="118" label="on"></edge>
+        <edge id="10018" source="6" target="119" label="on"></edge>
+
+        <edge id="11000" source="101" target="107" label="link"></edge>
+        <!--<edge id="11001" source="102" target="104" label="link"></edge>-->
+
+        <edge id="11002" source="104" target="102" label="link"></edge>
+        <edge id="11003" source="105" target="111" label="link"></edge>
+
+        <edge id="11004" source="107" target="101" label="link"></edge>
+        <edge id="11005" source="108" target="112" label="link"></edge>
+        <edge id="11006" source="109" target="114" label="link"></edge>
+
+        <edge id="11007" source="111" target="105" label="link"></edge>
+        <edge id="11008" source="112" target="108" label="link"></edge>
+        <edge id="11009" source="113" target="117" label="link"></edge>
+
+        <edge id="11010" source="114" target="109" label="link"></edge>
+        <edge id="11011" source="115" target="118" label="link"></edge>
+
+        <edge id="11012" source="117" target="113" label="link"></edge>
+        <edge id="11013" source="118" target="115" label="link"></edge>
+
+        <edge id="12000" source="103" target="1000" label="host"></edge>
+        <edge id="12001" source="103" target="1001" label="host"></edge>
+        <edge id="12002" source="110" target="1002" label="host"></edge>
+        <edge id="12003" source="116" target="1003" label="host"></edge>
+        <edge id="12004" source="106" target="1004" label="host"></edge>
+        <edge id="12005" source="119" target="1005" label="host"></edge>
+    </graph>
+</graphml>
\ No newline at end of file