diff --git a/schema/corenova-node.yang b/schema/corenova-node.yang
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+module corenova-node {
+  namespace "urn:corenova:node";
+  prefix node;
+
+  organization
+    "Corenova Technologies, Inc.";
+
+  contact
+    "Peter K. Lee <peter@corenova.com>";
+
+  description
+    "This module defines extensions to dynamically control schema node
+     display and access overlay controls";
+
+  feature corenova-node {
+    description
+      "this is to indicate the agent supports dynamic schema node
+       link/map/view.";
+  }
+    
+  extension link {
+    description
+      "Links the current leaf (or leaf-list) to an alternate leaf in the
+       schema data tree. The current leaf becomes a 'mirror' instance
+       of the target node.";
+    argument target-node-path {
+      yin-element true;
+    }
+  }
+
+  extension map {
+    description
+      "Maps the current container (or list entry) to an alternate container
+       in the schema data tree. The target-node-path must not map to
+       leaf or leaf-list nodes. The current container will map to
+       additional data nodes found inside the alternate container. The
+       mapped data nodes behave similarly to the 'link' extension
+       case. It can be defined one or more times within the same
+       container to map across modules and other subtrees.";
+    argument target-node-path {
+      yin-element true;
+    }
+  }
+
+  extension view {
+    description
+      "Informs the interface layers that only the data nodes referenced
+       within the value argument should be made visible to the
+       consumer.";
+    argument value;
+  }
+}