diff --git a/cord-device.yang b/cord-device.yang
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@@ -0,0 +1,48 @@
+module cord-device {
+  namespace "urn:cord:device";
+  prefix cord-dev;
+  yang-version 1.1;
+
+  organization
+   "Open Networking Lab (CORD) / Corenova Technologies";
+
+  contact
+    "Larry Peterson <llp@onlab.us>
+     Peter K. Lee <peter@corenova.com>";
+  
+  import ietf-yang-types { prefix yang; }
+  
+  revision 2016-07-14 {
+    description "Initial revision.";
+  }
+
+  typedef bandwidth {
+    type unit32;
+    range 1000000..max; // should be at least 1 Mbps?
+    units 'bps';
+  }
+  
+  grouping device {
+    leaf mac { type yang:mac-address; mandatory true; }
+    leaf identity { type string; }
+
+    leaf subscriber {
+      type instance-identifier;
+      config false;
+    }
+    
+    container features {
+      // how are the uplink/downlink speeds defined here related to 'subscriber'?
+      leaf uplink-speed {
+        type bandwidth;
+        default 1000000000;      
+      }
+      leaf downlink-speed {
+        type bandwidth;
+        default 1000000000;      
+      }
+      action update;
+    }
+    action save;
+  }
+}