diff --git a/pisi/data.py b/pisi/data.py
new file mode 100644
index 00000000..94b6d0c0
--- /dev/null
+++ b/pisi/data.py
@@ -0,0 +1,37 @@
+# Copyright (C) 2005, TUBITAK/UEKAE
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# Please read the COPYING file.
+#
+# Authors:  Eray Ozkural <eray@uludag.org.tr>
+
+"""a placeholder for data types, might factor elsewhere later"""
+
+import pisi.xmlfile
+
+__metaclass__ = xmlfile.autoxml
+
+class Distribution:
+    t_Name = [xmlfile.Text, xmlfile.mandatory]
+    t_Version = [xmlfile.Text, xmlfile.mandatory]
+    t_Type =  [xmlfile.Text, xmlfile.mandatory]
+    t_Dependencies = [ [xmlfile.Text], xmlfile.optional, "Distribution"]
+
+class Component:
+    "part-of representation for component declarations"
+    t_Name = [xmlfile.Text, xmlfile.mandatory]
+    t_PartOf = [xmlfile.Text, xmlfile.mandatory]
+    #t_Icon = [xmlfile.Binary, xmlfile.mandatory]
+    t_Dependencies = [ [xmlfile.String], xmlfile.optional, "Component"]
+
+class ComponentTree:
+    "index representation for the component structure"
+    tag = "Component"
+    t_Name = [xmlfile.Text, xmlfile.mandatory]
+    #t_Icon = [xmlfile.Binary, xmlfile.mandatory]
+    t_Dependencies = [ [xmlfile.Text], xmlfile.optional, "Component"]
+    t_Parts = [ [ComponentTree], xmlfile.optional, "Component"]