diff --git a/OpenChange/classes.txt b/OpenChange/classes.txt
new file mode 100644
index 000000000..5e82d7864
--- /dev/null
+++ b/OpenChange/classes.txt
@@ -0,0 +1,27 @@
+class hierarchy:
+
+MAPIStoreContext
+  MAPIStoreGCSBaseContext
+    MAPIStoreCalendarContext
+    MAPIStoreContactsContext
+    MAPIStoreTasksContext
+  MAPIStoreFileSystemBaseContext
+    MAPIStoreCommonViewsContext
+    MAPIStoreDeferredActionsContext
+    MAPIStoreDraftsContext
+    MAPIStoreJournalContext
+    MAPIStoreNotesContext
+    MAPIStoreRemindersContext
+    MAPIStoreSearchContext
+    MAPIStoreSentItemsContext
+    MAPIStoreShortcutsContext
+
+    (undecided:)
+    DeletedItems (trash IMAP folder?)
+    Freebusy (needs info)
+    Schedule (needs info + purpose?)
+    Views (needs info + purpose)
+  MAPIStoreMailContext
+    MAPIStoreOutboxContext
+      MAPIStoreSpoolerContext
+