diff --git a/xos/header.py b/xos/header.py
new file mode 100644
index 0000000..803d477
--- /dev/null
+++ b/xos/header.py
@@ -0,0 +1,30 @@
+
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from django.db import models
+from django.db.models import *
+from core.models import Service
+from core.models.xosbase import StrippedCharField
+import os
+from django.db import models, transaction
+from django.forms.models import model_to_dict
+import traceback
+from xos.exceptions import *
+
+class ConfigurationError(Exception):
+    pass
+
+VTN_KIND = "VTN"